The Xen netback functionality in the Linux kernel before 3.7.8 allows guest OS users to cause a denial of service (loop) by triggering ring pointer corruption.

The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security and bugfixes.

Four new speculative execution information leak issues have been identified in Intel CPUs. (bsc#1111331)

CVE-2018-12126: Microarchitectural Store Buffer Data Sampling (MSBDS)

CVE-2018-12127: Microarchitectural Fill Buffer Data Sampling (MFBDS)

CVE-2018-12130: Microarchitectural Load Port Data Samling (MLPDS)

CVE-2019-11091: Microarchitectural Data Sampling Uncacheable Memory (MDSUM)

This kernel update contains software mitigations for these issues, which also utilize CPU microcode updates shipped in parallel.

For more information on this set of information leaks, check out https://www.suse.com/support/kb/doc/?id=7023736

The following security bugs were fixed: CVE-2019-9213: The expand_downwards function in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bnc#1128166).

CVE-2013-0216: The Xen netback functionality allowed guest OS users to cause a denial of service (loop) by triggering ring pointer corruption (bnc#800280).

CVE-2013-0231: The pciback_enable_msi function in the PCI backend driver (drivers/xen/pciback/conf_space_capability_msi.c) in Xen allowed guest OS users with PCI device access to cause a denial of service via a large number of kernel log messages. (bnc#801178).

CVE-2012-3430: The rds_recvmsg function in net/rds/recv.c did not initialize a certain structure member, which allowed local users to obtain potentially sensitive information from kernel stack memory via a recvfrom or recvmsg system call on an RDS socket (bnc#773383).

CVE-2012-3412: The sfc (aka Solarflare Solarstorm) driver allowed remote attackers to cause a denial of service (DMA descriptor consumption and network-controller outage) via crafted TCP packets that trigger a small MSS value (bnc#774523).

CVE-2013-0160: The kernel allowed local users to obtain sensitive information about keystroke timing by using the inotify API on the /dev/ptmx device (bnc#797175).

CVE-2013-1979: The scm_set_cred function in include/net/scm.h uses incorrect uid and gid values during credentials passing, which allowed local users to gain privileges via a crafted application (bnc#816708).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This Linux kernel update fixes various security issues and bugs in the SUSE Linux Enterprise 10 SP4 kernel.

The following security issues have been fixed :

CVE-2013-0871: A race condition in ptrace(2) could be used by local attackers to crash the kernel and/or execute code in kernel context.

CVE-2013-0160: Avoid side channel information leaks from the ptys via ptmx, which allowed local attackers to guess keypresses.

CVE-2012-4530: Avoid leaving bprm->interp on the stack which might have leaked information from the kernel to userland attackers.

CVE-2013-0268: The msr_open function in arch/x86/kernel/msr.c in the Linux kernel allowed local users to bypass intended capability restrictions by executing a crafted application as root, as demonstrated by msr32.c.

CVE-2013-0216: The Xen netback functionality in the Linux kernel allowed guest OS users to cause a denial of service (loop) by triggering ring pointer corruption.

CVE-2013-0231: The pciback_enable_msi function in the PCI backend driver (drivers/xen/pciback/conf_space_capability_msi.c) in Xen for the Linux kernel allowed guest OS users with PCI device access to cause a denial of service via a large number of kernel log messages. NOTE: some of these details are obtained from third-party information.

Also the following non-security bugs have been fixed :

S/390 :

  - s390x: tty struct used after free (bnc#809692,     LTC#90216).

  - s390x/kernel: sched_clock() overflow (bnc#799611,     LTC#87978).

  - qeth: set new mac even if old mac is gone     (bnc#789012,LTC#86643).

  - qeth: set new mac even if old mac is gone (2)     (bnc#792697,LTC#87138).

  - qeth: fix deadlock between recovery and bonding driver     (bnc#785101,LTC#85905).

  - dasd: check count address during online setting     (bnc#781485,LTC#85346).

  - hugetlbfs: add missing TLB invalidation     (bnc#781485,LTC#85463).

  - s390/kernel: make user-access pagetable walk code huge     page aware (bnc#781485,LTC#85455).

XEN :

  - xen/netback: fix netbk_count_requests().

  - xen: properly bound buffer access when parsing     cpu/availability.

  - xen/scsiback/usbback: move cond_resched() invocations to     proper place.

  - xen/pciback: properly clean up after calling     pcistub_device_find().

  - xen: add further backward-compatibility configure     options.

  - xen/PCI: suppress bogus warning on old hypervisors.

  - xenbus: fix overflow check in xenbus_dev_write().

  - xen/x86: do not corrupt %eip when returning from a     signal handler.

Other :

  - kernel: Restrict clearing TIF_SIGPENDING (bnc#742111).

  - kernel: recalc_sigpending_tsk fixes (bnc#742111).

  - xfs: Do not reclaim new inodes in xfs_sync_inodes()     (bnc#770980).

  - jbd: Avoid BUG_ON when checkpoint stalls (bnc#795335).

  - reiserfs: Fix int overflow while calculating free space     (bnc#795075).

  - cifs: clarify the meaning of tcpStatus == CifsGood     (bnc#769093).

  - cifs: do not allow cifs_reconnect to exit with NULL     socket pointer (bnc#769093).

  - cifs: switch to seq_files (bnc#776370).

  - scsi: fix check of PQ and PDT bits for WLUNs     (bnc#765687).

  - hugetlb: preserve hugetlb pte dirty state (bnc#790236).

  - poll: enforce RLIMIT_NOFILE in poll() (bnc#787272).

  - proc: fix ->open less usage due to ->proc_fops flip     (bnc#776370).

  - rpm/kernel-binary.spec.in: Ignore kabi errors if     %%ignore_kabi_badness is defined. This is used in the     Kernel:* projects in the OBS.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote OracleVM system is missing necessary patches to address critical security updates :

  - xen-pciback: rate limit error messages from     xen_pcibk_enable_msi[,x] (Jan Beulich) [Orabug:
    16243736] (CVE-2013-0231)

  - Xen: Fix stack corruption in xen_failsafe_callback for     32bit PVOPS guests. (Frediano Ziglio) [Orabug: 16274171]     (CVE-2013-0190)

  - netback: correct netbk_tx_err to handle wrap around.
    (Ian Campbell) [Orabug: 16243309] (CVE-2013-0216     CVE-2013-0217)

  - xen/netback: free already allocated memory on failure in     xen_netbk_get_requests (Ian Campbell) [Orabug: 16243309]     (CVE-2013-0216 CVE-2013-0217)

  - xen/netback: don't leak pages on failure in     xen_netbk_tx_check_gop. (Ian Campbell) [Orabug:
    16243309] (CVE-2013-0216 CVE-2013-0217)

  - xen/netback: shutdown the ring if it contains garbage.
    (Ian Campbell) [Orabug: 16243309] (CVE-2013-0216     CVE-2013-0217)

  - e1000e: Avoid wrong check on TX hang (Jeff Kirsher)     [Orabug: 15834316]

The Linux kernel was updated to fix various bugs and security issues :

CVE-2013-0871: Race condition in the ptrace functionality in the Linux kernel allowed local users to gain privileges via a PTRACE_SETREGS ptrace system call in a crafted application, as demonstrated by ptrace_death.

CVE-2013-0160: Avoid a side channel attack on /dev/ptmx (keyboard input timing).

CVE-2012-5374: Fixed a local denial of service in the BTRFS hashing code.

CVE-2013-0309: arch/x86/include/asm/pgtable.h in the Linux kernel, when transparent huge pages are used, does not properly support PROT_NONE memory regions, which allows local users to cause a denial of service (system crash) via a crafted application.

CVE-2013-0268: The msr_open function in arch/x86/kernel/msr.c in the Linux kernel allowed local users to bypass intended capability restrictions by executing a crafted application as root, as demonstrated by msr32.c.

CVE-2012-0957: The override_release function in kernel/sys.c in the Linux kernel allowed local users to obtain sensitive information from kernel stack memory via a uname system call in conjunction with a UNAME26 personality.

CVE-2013-0216: The Xen netback functionality in the Linux kernel allowed guest OS users to cause a denial of service (loop) by triggering ring pointer corruption.

CVE-2013-0231: The pciback_enable_msi function in the PCI backend driver (drivers/xen/pciback/conf_space_capability_msi.c) in Xen for the Linux kernel allowed guest OS users with PCI device access to cause a denial of service via a large number of kernel log messages.
NOTE: some of these details are obtained from third-party information.

CVE-2012-4530: The load_script function in fs/binfmt_script.c in the Linux kernel did not properly handle recursion, which allowed local users to obtain sensitive information from kernel stack memory via a crafted application.

CVE-2012-4508: Race condition in fs/ext4/extents.c in the Linux kernel allowed local users to obtain sensitive information from a deleted file by reading an extent that was not properly marked as uninitialized.

CVE-2012-3412: The sfc (aka Solarflare Solarstorm) driver in the Linux kernel allowed remote attackers to cause a denial of service (DMA descriptor consumption and network-controller outage) via crafted TCP packets that trigger a small MSS value.

CVE-2012-2745: The copy_creds function in kernel/cred.c in the Linux kernel provided an invalid replacement session keyring to a child process, which allowed local users to cause a denial of service (panic) via a crafted application that uses the fork system call.

CVE-2012-3375: The epoll_ctl system call in fs/eventpoll.c in the Linux kernel did not properly handle ELOOP errors in EPOLL_CTL_ADD operations, which allowed local users to cause a denial of service (file-descriptor consumption and system crash) via a crafted application that attempts to create a circular epoll dependency.

CVE-2012-3400: Heap-based buffer overflow in the udf_load_logicalvol function in fs/udf/super.c in the Linux kernel allowed remote attackers to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted UDF filesystem.

The Linux kernel was updated to 3.4.33 and to fix a local root privilege escalation and various other security and non-security bugs.

CVE-2013-1763: A out of bounds access in sock_diag could be used by local attackers to execute code in kernel context and so become root.

CVE-2013-0160: The atime of /dev/ptmx is no longer updated, avoiding side channel attacks via user typing speed.

CVE-2012-5374: Denial of service via btrfs hashes could have been used by local attackers to cause a compute denial of service.

CVE-2013-0216: Fixed a problem in XEN netback: shutdown the ring if it contains garbage.

CVE-2013-0231: Fixed a problem in XEN pciback: rate limit error messages from xen_pcibk_enable_msi(x).

The remote Oracle Linux 5 / 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2013-2507 advisory.

  - arch/x86/include/asm/pgtable.h in the Linux kernel before 3.6.2, when transparent huge pages are used,     does not properly support PROT_NONE memory regions, which allows local users to cause a denial of service     (system crash) via a crafted application. (CVE-2013-0309)

  - The cipso_v4_validate function in net/ipv4/cipso_ipv4.c in the Linux kernel before 3.4.8 allows local     users to cause a denial of service (NULL pointer dereference and system crash) or possibly have     unspecified other impact via an IPOPT_CIPSO IP_OPTIONS setsockopt system call. (CVE-2013-0310)

  - The translate_desc function in drivers/vhost/vhost.c in the Linux kernel before 3.7 does not properly     handle cross-region descriptors, which allows guest OS users to obtain host OS privileges by leveraging     KVM guest OS privileges. (CVE-2013-0311)

  - The xen_iret function in arch/x86/xen/xen-asm_32.S in the Linux kernel before 3.7.9 on 32-bit Xen     paravirt_ops platforms does not properly handle an invalid value in the DS segment register, which allows     guest OS users to gain guest OS privileges via a crafted application. (CVE-2013-0228)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

From Red Hat Security Advisory 2013:0747 :

Updated kernel packages that fix several security issues and three bugs are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* A flaw was found in the Xen netback driver implementation in the Linux kernel. A privileged guest user with access to a para-virtualized network device could use this flaw to cause a long loop in netback, leading to a denial of service that could potentially affect the entire system. (CVE-2013-0216, Moderate)

* A flaw was found in the Xen PCI device back-end driver implementation in the Linux kernel. A privileged guest user in a guest that has a PCI passthrough device could use this flaw to cause a denial of service that could potentially affect the entire system.
(CVE-2013-0231, Moderate)

* A NULL pointer dereference flaw was found in the IP packet transformation framework (XFRM) implementation in the Linux kernel. A local user who has the CAP_NET_ADMIN capability could use this flaw to cause a denial of service. (CVE-2013-1826, Moderate)

* Information leak flaws were found in the XFRM implementation in the Linux kernel. A local user who has the CAP_NET_ADMIN capability could use these flaws to leak kernel stack memory to user-space.
(CVE-2012-6537, Low)

* An information leak flaw was found in the logical link control (LLC) implementation in the Linux kernel. A local, unprivileged user could use this flaw to leak kernel stack memory to user-space.
(CVE-2012-6542, Low)

* Two information leak flaws were found in the Linux kernel's Asynchronous Transfer Mode (ATM) subsystem. A local, unprivileged user could use these flaws to leak kernel stack memory to user-space.
(CVE-2012-6546, Low)

* An information leak flaw was found in the TUN/TAP device driver in the Linux kernel's networking implementation. A local user with access to a TUN/TAP virtual interface could use this flaw to leak kernel stack memory to user-space. (CVE-2012-6547, Low)

Red Hat would like to thank the Xen project for reporting the CVE-2013-0216 and CVE-2013-0231 issues.

This update also fixes the following bugs :

* The IPv4 code did not correctly update the Maximum Transfer Unit (MTU) of the designed interface when receiving ICMP Fragmentation Needed packets. Consequently, a remote host did not respond correctly to ping attempts. With this update, the IPv4 code has been modified so the MTU of the designed interface is adjusted as expected in this situation. The ping command now provides the expected output.
(BZ#923353)

* Previously, the be2net code expected the last word of an MCC completion message from the firmware to be transferred by direct memory access (DMA) at once. However, this is not always true, and could therefore cause the BUG_ON() macro to be triggered in the be_mcc_compl_is_new() function, consequently leading to a kernel panic. The BUG_ON() macro has been removed from be_mcc_compl_is_new(), and the kernel panic no longer occurs in this scenario. (BZ#923910)

* Previously, the NFSv3 server incorrectly converted 64-bit cookies to 32-bit. Consequently, the cookies became invalid, which affected all file system operations depending on these cookies, such as the READDIR operation that is used to read entries from a directory. This led to various problems, such as exported directories being empty or displayed incorrectly, or an endless loop of the READDIRPLUS procedure which could potentially cause a buffer overflow. This update modifies knfsd code so that 64-bit cookies are now handled correctly and all file system operations work as expected. (BZ#924087)

Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

Multiple vulnerabilities has been found and corrected in the Linux kernel :

The scm_set_cred function in include/net/scm.h in the Linux kernel before 3.8.11 uses incorrect uid and gid values during credentials passing, which allows local users to gain privileges via a crafted application. (CVE-2013-1979)

The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.9-rc7 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3232)

net/tipc/socket.c in the Linux kernel before 3.9-rc7 does not initialize a certain data structure and a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.
(CVE-2013-3235)

The rose_recvmsg function in net/rose/af_rose.c in the Linux kernel before 3.9-rc7 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3234)

The llcp_sock_recvmsg function in net/nfc/llcp/sock.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable and a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3233)

The llc_ui_recvmsg function in net/llc/af_llc.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3231)

The iucv_sock_recvmsg function in net/iucv/af_iucv.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.
(CVE-2013-3229)

The irda_recvmsg_dgram function in net/irda/af_irda.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.
(CVE-2013-3228)

The caif_seqpkt_recvmsg function in net/caif/caif_socket.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3227)

The rfcomm_sock_recvmsg function in net/bluetooth/rfcomm/sock.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3225)

The bt_sock_recvmsg function in net/bluetooth/af_bluetooth.c in the Linux kernel before 3.9-rc7 does not properly initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3224)

The ax25_recvmsg function in net/ax25/af_ax25.c in the Linux kernel before 3.9-rc7 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3223)

The vcc_recvmsg function in net/atm/common.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call. (CVE-2013-3222)

Integer overflow in the fb_mmap function in drivers/video/fbmem.c in the Linux kernel before 3.8.9, as used in a certain Motorola build of Android 4.1.2 and other products, allows local users to create a read-write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted /dev/graphics/fb0 mmap2 system calls, as demonstrated by the Motochopper pwn program.
(CVE-2013-2596)

arch/x86/kernel/cpu/perf_event_intel.c in the Linux kernel before 3.8.9, when the Performance Events Subsystem is enabled, specifies an incorrect bitmask, which allows local users to cause a denial of service (general protection fault and system crash) by attempting to set a reserved bit. (CVE-2013-2146)

The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows local users to gain privileges via a crafted perf_event_open system call. (CVE-2013-2094)

The ioapic_read_indirect function in virt/kvm/ioapic.c in the Linux kernel through 3.8.4 does not properly handle a certain combination of invalid IOAPIC_REG_SELECT and IOAPIC_REG_WINDOW operations, which allows guest OS users to obtain sensitive information from host OS memory or cause a denial of service (host OS OOPS) via a crafted application. (CVE-2013-1798)

Use-after-free vulnerability in arch/x86/kvm/x86.c in the Linux kernel through 3.8.4 allows guest OS users to cause a denial of service (host OS memory corruption) or possibly have unspecified other impact via a crafted application that triggers use of a guest physical address (GPA) in (1) movable or (2) removable memory during an MSR_KVM_SYSTEM_TIME kvm_set_msr_common operation. (CVE-2013-1797)

The kvm_set_msr_common function in arch/x86/kvm/x86.c in the Linux kernel through 3.8.4 does not ensure a required time_page alignment during an MSR_KVM_SYSTEM_TIME operation, which allows guest OS users to cause a denial of service (buffer overflow and host OS memory corruption) or possibly have unspecified other impact via a crafted application. (CVE-2013-1796)

The do_tkill function in kernel/signal.c in the Linux kernel before 3.8.9 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory via a crafted application that makes a (1) tkill or (2) tgkill system call.
(CVE-2013-2141)

Heap-based buffer overflow in the tg3_read_vpd function in drivers/net/ethernet/broadcom/tg3.c in the Linux kernel before 3.8.6 allows physically proximate attackers to cause a denial of service (system crash) or possibly execute arbitrary code via crafted firmware that specifies a long string in the Vital Product Data (VPD) data structure. (CVE-2013-1929)

The main function in tools/hv/hv_kvp_daemon.c in hypervkvpd, as distributed in the Linux kernel before 3.8-rc1, allows local users to cause a denial of service (daemon exit) via a crafted application that sends a Netlink message. NOTE: this vulnerability exists because of an incorrect fix for CVE-2012-2669. (CVE-2012-5532)

The udf_encode_fh function in fs/udf/namei.c in the Linux kernel before 3.6 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel heap memory via a crafted application. (CVE-2012-6548)

The isofs_export_encode_fh function in fs/isofs/export.c in the Linux kernel before 3.6 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel heap memory via a crafted application. (CVE-2012-6549)

net/dcb/dcbnl.c in the Linux kernel before 3.8.4 does not initialize certain structures, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.
(CVE-2013-2634)

The rtnl_fill_ifinfo function in net/core/rtnetlink.c in the Linux kernel before 3.8.4 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel stack memory via a crafted application. (CVE-2013-2635)

fs/ext3/super.c in the Linux kernel before 3.8.4 uses incorrect arguments to functions in certain circumstances related to printk input, which allows local users to conduct format-string attacks and possibly gain privileges via a crafted application. (CVE-2013-1848)

The flush_signal_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa_restorer field across an exec operation, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application containing a sigaction system call. (CVE-2013-0914)

Heap-based buffer overflow in the wdm_in_callback function in drivers/usb/class/cdc-wdm.c in the Linux kernel before 3.8.4 allows physically proximate attackers to cause a denial of service (system crash) or possibly execute arbitrary code via a crafted cdc-wdm USB device. (CVE-2013-1860)

Race condition in the install_user_keyrings function in security/keys/process_keys.c in the Linux kernel before 3.8.3 allows local users to cause a denial of service (NULL pointer dereference and system crash) via crafted keyctl system calls that trigger keyring operations in simultaneous threads. (CVE-2013-1792)

The report API in the crypto user configuration API in the Linux kernel through 3.8.2 uses an incorrect C library function for copying strings, which allows local users to obtain sensitive information from kernel stack memory by leveraging the CAP_NET_ADMIN capability.
(CVE-2013-2546)

The crypto_report_one function in crypto/crypto_user.c in the report API in the crypto user configuration API in the Linux kernel through 3.8.2 does not initialize certain structure members, which allows local users to obtain sensitive information from kernel heap memory by leveraging the CAP_NET_ADMIN capability. (CVE-2013-2547)

The crypto_report_one function in crypto/crypto_user.c in the report API in the crypto user configuration API in the Linux kernel through 3.8.2 uses an incorrect length value during a copy operation, which allows local users to obtain sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability. (CVE-2013-2548)

The translate_desc function in drivers/vhost/vhost.c in the Linux kernel before 3.7 does not properly handle cross-region descriptors, which allows guest OS users to obtain host OS privileges by leveraging KVM guest OS privileges. (CVE-2013-0311)

Array index error in the __sock_diag_rcv_msg function in net/core/sock_diag.c in the Linux kernel before 3.7.10 allows local users to gain privileges via a large family value in a Netlink message. (CVE-2013-1763)

The __skb_recv_datagram function in net/core/datagram.c in the Linux kernel before 3.8 does not properly handle the MSG_PEEK flag with zero-length data, which allows local users to cause a denial of service (infinite loop and system hang) via a crafted application.
(CVE-2013-0290)

Use-after-free vulnerability in the shmem_remount_fs function in mm/shmem.c in the Linux kernel before 3.7.10 allows local users to gain privileges or cause a denial of service (system crash) by remounting a tmpfs filesystem without specifying a required mpol (aka mempolicy) mount option. (CVE-2013-1767)

The xen_iret function in arch/x86/xen/xen-asm_32.S in the Linux kernel before 3.7.9 on 32-bit Xen paravirt_ops platforms does not properly handle an invalid value in the DS segment register, which allows guest OS users to gain guest OS privileges via a crafted application.
(CVE-2013-0228)

Memory leak in drivers/net/xen-netback/netback.c in the Xen netback functionality in the Linux kernel before 3.7.8 allows guest OS users to cause a denial of service (memory consumption) by triggering certain error conditions. (CVE-2013-0217)

The Xen netback functionality in the Linux kernel before 3.7.8 allows guest OS users to cause a denial of service (loop) by triggering ring pointer corruption. (CVE-2013-0216)

The __tun_chr_ioctl function in drivers/net/tun.c in the Linux kernel before 3.6 does not initialize a certain structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted application. (CVE-2012-6547)

The updated packages provides a solution for these security issues.

This update fixes the following security issues :

  - A flaw was found in the Xen netback driver     implementation in the Linux kernel. A privileged guest     user with access to a para-virtualized network device     could use this flaw to cause a long loop in netback,     leading to a denial of service that could potentially     affect the entire system. (CVE-2013-0216, Moderate)

  - A flaw was found in the Xen PCI device back-end driver     implementation in the Linux kernel. A privileged guest     user in a guest that has a PCI passthrough device could     use this flaw to cause a denial of service that could     potentially affect the entire system. (CVE-2013-0231,     Moderate)

  - A NULL pointer dereference flaw was found in the IP     packet transformation framework (XFRM) implementation in     the Linux kernel. A local user who has the CAP_NET_ADMIN     capability could use this flaw to cause a denial of     service. (CVE-2013-1826, Moderate)

  - Information leak flaws were found in the XFRM     implementation in the Linux kernel. A local user who has     the CAP_NET_ADMIN capability could use these flaws to     leak kernel stack memory to user-space. (CVE-2012-6537,     Low)

  - An information leak flaw was found in the logical link     control (LLC) implementation in the Linux kernel. A     local, unprivileged user could use this flaw to leak     kernel stack memory to user-space. (CVE-2012-6542, Low)

  - Two information leak flaws were found in the Linux     kernel's Asynchronous Transfer Mode (ATM) subsystem. A     local, unprivileged user could use these flaws to leak     kernel stack memory to user-space. (CVE-2012-6546, Low)

  - An information leak flaw was found in the TUN/TAP device     driver in the Linux kernel's networking implementation.
    A local user with access to a TUN/TAP virtual interface     could use this flaw to leak kernel stack memory to     user-space. (CVE-2012-6547, Low)

This update also fixes the following bugs :

  - The IPv4 code did not correctly update the Maximum     Transfer Unit (MTU) of the designed interface when     receiving ICMP Fragmentation Needed packets.
    Consequently, a remote host did not respond correctly to     ping attempts. With this update, the IPv4 code has been     modified so the MTU of the designed interface is     adjusted as expected in this situation. The ping command     now provides the expected output.

  - Previously, the be2net code expected the last word of an     MCC completion message from the firmware to be     transferred by direct memory access (DMA) at once.
    However, this is not always true, and could therefore     cause the BUG_ON() macro to be triggered in the     be_mcc_compl_is_new() function, consequently leading to     a kernel panic. The BUG_ON() macro has been removed from     be_mcc_compl_is_new(), and the kernel panic no longer     occurs in this scenario.

  - Previously, the NFSv3 server incorrectly converted     64-bit cookies to 32-bit. Consequently, the cookies     became invalid, which affected all file system     operations depending on these cookies, such as the     READDIR operation that is used to read entries from a     directory. This led to various problems, such as     exported directories being empty or displayed     incorrectly, or an endless loop of the READDIRPLUS     procedure which could potentially cause a buffer     overflow. This update modifies knfsd code so that 64-bit     cookies are now handled correctly and all file system     operations work as expected.

The system must be rebooted for this update to take effect.

Updated kernel packages that fix several security issues and three bugs are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* A flaw was found in the Xen netback driver implementation in the Linux kernel. A privileged guest user with access to a para-virtualized network device could use this flaw to cause a long loop in netback, leading to a denial of service that could potentially affect the entire system. (CVE-2013-0216, Moderate)

* A flaw was found in the Xen PCI device back-end driver implementation in the Linux kernel. A privileged guest user in a guest that has a PCI passthrough device could use this flaw to cause a denial of service that could potentially affect the entire system.
(CVE-2013-0231, Moderate)

* A NULL pointer dereference flaw was found in the IP packet transformation framework (XFRM) implementation in the Linux kernel. A local user who has the CAP_NET_ADMIN capability could use this flaw to cause a denial of service. (CVE-2013-1826, Moderate)

* Information leak flaws were found in the XFRM implementation in the Linux kernel. A local user who has the CAP_NET_ADMIN capability could use these flaws to leak kernel stack memory to user-space.
(CVE-2012-6537, Low)

* An information leak flaw was found in the logical link control (LLC) implementation in the Linux kernel. A local, unprivileged user could use this flaw to leak kernel stack memory to user-space.
(CVE-2012-6542, Low)

* Two information leak flaws were found in the Linux kernel's Asynchronous Transfer Mode (ATM) subsystem. A local, unprivileged user could use these flaws to leak kernel stack memory to user-space.
(CVE-2012-6546, Low)

* An information leak flaw was found in the TUN/TAP device driver in the Linux kernel's networking implementation. A local user with access to a TUN/TAP virtual interface could use this flaw to leak kernel stack memory to user-space. (CVE-2012-6547, Low)

Red Hat would like to thank the Xen project for reporting the CVE-2013-0216 and CVE-2013-0231 issues.

This update also fixes the following bugs :

* The IPv4 code did not correctly update the Maximum Transfer Unit (MTU) of the designed interface when receiving ICMP Fragmentation Needed packets. Consequently, a remote host did not respond correctly to ping attempts. With this update, the IPv4 code has been modified so the MTU of the designed interface is adjusted as expected in this situation. The ping command now provides the expected output.
(BZ#923353)

* Previously, the be2net code expected the last word of an MCC completion message from the firmware to be transferred by direct memory access (DMA) at once. However, this is not always true, and could therefore cause the BUG_ON() macro to be triggered in the be_mcc_compl_is_new() function, consequently leading to a kernel panic. The BUG_ON() macro has been removed from be_mcc_compl_is_new(), and the kernel panic no longer occurs in this scenario. (BZ#923910)

* Previously, the NFSv3 server incorrectly converted 64-bit cookies to 32-bit. Consequently, the cookies became invalid, which affected all file system operations depending on these cookies, such as the READDIR operation that is used to read entries from a directory. This led to various problems, such as exported directories being empty or displayed incorrectly, or an endless loop of the READDIRPLUS procedure which could potentially cause a buffer overflow. This update modifies knfsd code so that 64-bit cookies are now handled correctly and all file system operations work as expected. (BZ#924087)

Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

This Linux kernel update fixes various security issues and bugs in the SUSE Linux Enterprise 10 SP4 kernel.

The following security issues have been fixed :

  - A race condition in ptrace(2) could be used by local     attackers to crash the kernel and/or execute code in     kernel context. (CVE-2013-0871)

  - Avoid side channel information leaks from the ptys via     ptmx, which allowed local attackers to guess keypresses.
    (CVE-2013-0160)

  - Avoid leaving bprm->interp on the stack which might have     leaked information from the kernel to userland     attackers. (CVE-2012-4530)

  - The msr_open function in arch/x86/kernel/msr.c in the     Linux kernel allowed local users to bypass intended     capability restrictions by executing a crafted     application as root, as demonstrated by msr32.c.
    (CVE-2013-0268)

  - The Xen netback functionality in the Linux kernel     allowed guest OS users to cause a denial of service     (loop) by triggering ring pointer corruption.
    (CVE-2013-0216)

  - The pciback_enable_msi function in the PCI backend     driver (drivers/xen/pciback/conf_space_capability_msi.c)     in Xen for the Linux kernel allowed guest OS users with     PCI device access to cause a denial of service via a     large number of kernel log messages. NOTE: some of these     details are obtained from third-party information.
    (CVE-2013-0231)

Also the following non-security bugs have been fixed :

S/390 :

  - s390x: tty struct used after free (bnc#809692,     LTC#90216).

  - s390x/kernel: sched_clock() overflow (bnc#799611,     LTC#87978).

  - qeth: set new mac even if old mac is gone     (bnc#789012,LTC#86643).

  - qeth: set new mac even if old mac is gone (2)     (bnc#792697,LTC#87138).

  - qeth: fix deadlock between recovery and bonding driver     (bnc#785101,LTC#85905).

  - dasd: check count address during online setting     (bnc#781485,LTC#85346).

  - hugetlbfs: add missing TLB invalidation     (bnc#781485,LTC#85463).

  - s390/kernel: make user-access pagetable walk code huge     page aware (bnc#781485,LTC#85455).

XEN :

  - xen/netback: fix netbk_count_requests().

  - xen: properly bound buffer access when parsing     cpu/availability.

  - xen/scsiback/usbback: move cond_resched() invocations to     proper place.

  - xen/pciback: properly clean up after calling     pcistub_device_find().

  - xen: add further backward-compatibility configure     options.

  - xen/PCI: suppress bogus warning on old hypervisors.

  - xenbus: fix overflow check in xenbus_dev_write().

  - xen/x86: do not corrupt %eip when returning from a     signal handler. Other :

  - kernel: Restrict clearing TIF_SIGPENDING. (bnc#742111)

  - kernel: recalc_sigpending_tsk fixes. (bnc#742111)

  - xfs: Do not reclaim new inodes in xfs_sync_inodes().
    (bnc#770980)

  - jbd: Avoid BUG_ON when checkpoint stalls. (bnc#795335)

  - reiserfs: Fix int overflow while calculating free space.
    (bnc#795075)

  - cifs: clarify the meaning of tcpStatus == CifsGood.
    (bnc#769093)

  - cifs: do not allow cifs_reconnect to exit with NULL     socket pointer. (bnc#769093)

  - cifs: switch to seq_files. (bnc#776370)

  - scsi: fix check of PQ and PDT bits for WLUNs.
    (bnc#765687)

  - hugetlb: preserve hugetlb pte dirty state. (bnc#790236)

  - poll: enforce RLIMIT_NOFILE in poll(). (bnc#787272)

  - proc: fix ->open less usage due to ->proc_fops flip.
    (bnc#776370)

  - rpm/kernel-binary.spec.in: Ignore kabi errors if     %%ignore_kabi_badness is defined. This is used in the     Kernel:* projects in the OBS.

Andrew Cooper of Citrix reported a Xen stack corruption in the Linux kernel. An unprivileged user in a 32bit PVOPS guest can cause the guest kernel to crash, or operate erroneously. (CVE-2013-0190)

A failure to validate input was discovered in the Linux kernel's Xen netback (network backend) driver. A user in a guest OS may exploit this flaw to cause a denial of service to the guest OS and other guest domains. (CVE-2013-0216)

A memory leak was discovered in the Linux kernel's Xen netback (network backend) driver. A user in a guest OS could trigger this flaw to cause a denial of service on the system. (CVE-2013-0217)

A flaw was discovered in the Linux kernel Xen PCI backend driver. If a PCI device is assigned to the guest OS, the guest OS could exploit this flaw to cause a denial of service on the host. (CVE-2013-0231)

A flaw was reported in the permission checks done by the Linux kernel for /dev/cpu/*/msr. A local root user with all capabilities dropped could exploit this flaw to execute code with full root capabilities.
(CVE-2013-0268)

Tommi Rantala discovered a flaw in the a flaw the Linux kernels handling of datagrams packets when the MSG_PEEK flag is specified. An unprivileged local user could exploit this flaw to cause a denial of service (system hang). (CVE-2013-0290)

A flaw was discovered in the Linux kernel's vhost driver used to accelerate guest networking in KVM based virtual machines. A privileged guest user could exploit this flaw to crash the host system. (CVE-2013-0311)

A flaw was discovered in the Extended Verification Module (EVM) of the Linux kernel. An unprivileged local user code exploit this flaw to cause a denial of service (system crash). (CVE-2013-0313)

An information leak was discovered in the Linux kernel's Bluetooth stack when HIDP (Human Interface Device Protocol) support is enabled.
A local unprivileged user could exploit this flaw to cause an information leak from the kernel. (CVE-2013-0349).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Andrew Cooper of Citrix reported a Xen stack corruption in the Linux kernel. An unprivileged user in a 32bit PVOPS guest can cause the guest kernel to crash, or operate erroneously. (CVE-2013-0190)

A failure to validate input was discovered in the Linux kernel's Xen netback (network backend) driver. A user in a guest OS may exploit this flaw to cause a denial of service to the guest OS and other guest domains. (CVE-2013-0216)

A memory leak was discovered in the Linux kernel's Xen netback (network backend) driver. A user in a guest OS could trigger this flaw to cause a denial of service on the system. (CVE-2013-0217)

Andrew Jones discovered a flaw with the xen_iret function in Linux kernel's Xen virtualizeation. In the 32-bit Xen paravirt platform an unprivileged guest OS user could exploit this flaw to cause a denial of service (crash the system) or gain guest OS privilege.
(CVE-2013-0228)

A flaw was discovered in the Linux kernel Xen PCI backend driver. If a PCI device is assigned to the guest OS, the guest OS could exploit this flaw to cause a denial of service on the host. (CVE-2013-0231)

A flaw was reported in the permission checks done by the Linux kernel for /dev/cpu/*/msr. A local root user with all capabilities dropped could exploit this flaw to execute code with full root capabilities.
(CVE-2013-0268)

A flaw was discovered in the Linux kernel's vhost driver used to accelerate guest networking in KVM based virtual machines. A privileged guest user could exploit this flaw to crash the host system. (CVE-2013-0311)

A flaw was discovered in the Extended Verification Module (EVM) of the Linux kernel. An unprivileged local user code exploit this flaw to cause a denial of service (system crash). (CVE-2013-0313)

An information leak was discovered in the Linux kernel's Bluetooth stack when HIDP (Human Interface Device Protocol) support is enabled.
A local unprivileged user could exploit this flaw to cause an information leak from the kernel. (CVE-2013-0349)

A flaw was discovered in the Edgeort USB serial converter driver when the device is disconnected while it is in use. A local user could exploit this flaw to cause a denial of service (system crash).
(CVE-2013-1774).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

A failure to validate input was discovered in the Linux kernel's Xen netback (network backend) driver. A user in a guest OS may exploit this flaw to cause a denial of service to the guest OS and other guest domains. (CVE-2013-0216)

A memory leak was discovered in the Linux kernel's Xen netback (network backend) driver. A user in a guest OS could trigger this flaw to cause a denial of service on the system. (CVE-2013-0217)

Andrew Jones discovered a flaw with the xen_iret function in Linux kernel's Xen virtualizeation. In the 32-bit Xen paravirt platform an unprivileged guest OS user could exploit this flaw to cause a denial of service (crash the system) or gain guest OS privilege.
(CVE-2013-0228)

A flaw was reported in the permission checks done by the Linux kernel for /dev/cpu/*/msr. A local root user with all capabilities dropped could exploit this flaw to execute code with full root capabilities.
(CVE-2013-0268)

A flaw was discovered in the Linux kernel's vhost driver used to accelerate guest networking in KVM based virtual machines. A privileged guest user could exploit this flaw to crash the host system. (CVE-2013-0311)

An information leak was discovered in the Linux kernel's Bluetooth stack when HIDP (Human Interface Device Protocol) support is enabled.
A local unprivileged user could exploit this flaw to cause an information leak from the kernel. (CVE-2013-0349)

A flaw was discovered on the Linux kernel's VFAT filesystem driver when a disk is mounted with the utf8 option (this is the default on Ubuntu). On a system where disks/images can be auto-mounted or a FAT filesystem is mounted an unprivileged user can exploit the flaw to gain root privileges. (CVE-2013-1773).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2013-0747.

ID	Name	Product	Family	Severity
125250	SUSE SLES11 Security Update : kernel (SUSE-SU-2019:14051-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)	Nessus	SuSE Local Security Checks	medium
83611	SUSE SLES11 Security Update : kernel (SUSE-SU-2014:0287-1)	Nessus	SuSE Local Security Checks	high
83580	SUSE SLED10 / SLES10 Security Update : kernel (SUSE-SU-2013:0674-1)	Nessus	SuSE Local Security Checks	medium
79499	OracleVM 3.1 : kernel-uek (OVMSA-2013-0010)	Nessus	OracleVM Local Security Checks	medium
74914	openSUSE Security Update : kernel (openSUSE-SU-2013:0396-1)	Nessus	SuSE Local Security Checks	high
74913	openSUSE Security Update : kernel (openSUSE-SU-2013:0395-1)	Nessus	SuSE Local Security Checks	high
68847	Oracle Linux 5 / 6 : Unbreakable Enterprise kernel (ELSA-2013-2507)	Nessus	Oracle Linux Local Security Checks	high
68809	Oracle Linux 5 : kernel (ELSA-2013-0747)	Nessus	Oracle Linux Local Security Checks	medium
68808	Oracle Linux 5 : kernel (ELSA-2013-0747-1)	Nessus	Oracle Linux Local Security Checks	medium
66975	Mandriva Linux Security Advisory : kernel (MDVSA-2013:176)	Nessus	Mandriva Local Security Checks	high
66344	SuSE 11.2 Security Update : Linux kernel (SAT Patch Numbers 7667 / 7669 / 7675)	Nessus	SuSE Local Security Checks	high
66016	Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20130416)	Nessus	Scientific Linux Local Security Checks	medium
65991	RHEL 5 : kernel (RHSA-2013:0747)	Nessus	Red Hat Local Security Checks	medium
65988	CentOS 5 : kernel (CESA-2013:0747)	Nessus	CentOS Local Security Checks	medium
65960	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 8527)	Nessus	SuSE Local Security Checks	medium
65959	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 8518)	Nessus	SuSE Local Security Checks	medium
65611	Ubuntu 12.10 : linux vulnerabilities (USN-1769-1)	Nessus	Ubuntu Local Security Checks	medium
65610	Ubuntu 12.04 LTS : linux-lts-quantal vulnerabilities (USN-1768-1)	Nessus	Ubuntu Local Security Checks	medium
65609	Ubuntu 12.04 LTS : linux vulnerabilities (USN-1767-1)	Nessus	Ubuntu Local Security Checks	medium
65252	Ubuntu 10.04 LTS : linux-lts-backport-oneiric vulnerabilities (USN-1760-1)	Nessus	Ubuntu Local Security Checks	medium
65077	Ubuntu 11.10 : linux vulnerabilities (USN-1756-1)	Nessus	Ubuntu Local Security Checks	medium
801541	CentOS RHSA-2013-0747 Security Check	Log Correlation Engine	Generic	high

Detections

Analytics

CVE-2013-0216

medium

Tenable Plugins

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