Updated kernel-rt packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise MRG 2.4.

The Red Hat Security Response Team has rated this update as having important 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-rt packages contain the Linux kernel, the core of any Linux operating system.

* A flaw was found in the way the Linux kernel's TCP/IP protocol suite implementation handled sending of certain UDP packets over sockets that used the UDP_CORK option when the UDP Fragmentation Offload (UFO) feature was enabled on the output device. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges on the system. (CVE-2013-4470, Important)

* A flaw was found in the way the perf_trace_event_perm() function in the Linux kernel checked permissions for the function tracer functionality. An unprivileged local user could use this flaw to enable function tracing and cause a denial of service on the system.
(CVE-2013-2930, Moderate)

* A flaw was found in the way the net_ctl_permissions() function in the Linux kernel checked access permissions. A local, unprivileged user could potentially use this flaw to access certain files in /proc/sys/net regardless of the underlying file system permissions.
(CVE-2013-4270, Moderate)

* A flaw was found in the way the Linux kernel's Adaptec RAID controller (aacraid) checked permissions of compat IOCTLs. A local attacker could use this flaw to bypass intended security restrictions.
(CVE-2013-6383, Moderate)

* A flaw was found in the way the get_dumpable() function return value was interpreted in the ptrace subsystem of the Linux kernel. When 'fs.suid_dumpable' was set to 2, a local, unprivileged local user could use this flaw to bypass intended ptrace restrictions and obtain potentially sensitive information. (CVE-2013-2929, Low)

* An invalid pointer dereference flaw was found in the Marvell 8xxx Libertas WLAN (libertas) driver in the Linux kernel. A local user able to write to a file that is provided by the libertas driver and located on the debug file system (debugfs) could use this flaw to crash the system. Note: The debugfs file system must be mounted locally to exploit this issue. It is not mounted by default. (CVE-2013-6378, Low)

* A NULL pointer dereference flaw was found in the Linux kernel's IPv6 source address-based routing implementation. A local attacker who has the CAP_NET_ADMIN capability could use this flaw to crash the system.
(CVE-2013-6431, Low)

Red Hat would like to thank Hannes Frederic Sowa for reporting CVE-2013-4470. The CVE-2013-4270 issue was discovered by Miroslav Vadkerti of Red Hat.

This update also fixes multiple bugs. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section.

Users should upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.8.13-rt27, correct these issues, and fix the bugs noted in the Red Hat Enterprise MRG 2 Technical Notes. The system must be rebooted for this update to take effect.

According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - The skb_flow_dissect function in     net/core/flow_dissector.c in the Linux kernel through     3.12 allows remote attackers to cause a denial of     service (infinite loop) via a small value in the IHL     field of a packet with IPIP     encapsulation.(CVE-2013-4348)

  - The IPv6 SCTP implementation in net/sctp/ipv6.c in the     Linux kernel through 3.11.1 uses data structures and     function calls that do not trigger an intended     configuration of IPsec encryption, which allows remote     attackers to obtain sensitive information by sniffing     the network.(CVE-2013-4350)

  - net/ipv6/ip6_output.c in the Linux kernel through     3.11.4 does not properly determine the need for UDP     Fragmentation Offload (UFO) processing of small packets     after the UFO queueing of a large packet, which allows     remote attackers to cause a denial of service (memory     corruption and system crash) or possibly have     unspecified other impact via network traffic that     triggers a large response packet.(CVE-2013-4387)

  - The Linux kernel before 3.12, when UDP Fragmentation     Offload (UFO) is enabled, does not properly initialize     certain data structures, which allows local users to     cause a denial of service (memory corruption and system     crash) or possibly gain privileges via a crafted     application that uses the UDP_CORK option in a     setsockopt system call and sends both short and long     packets, related to the ip_ufo_append_data function in     net/ipv4/ip_output.c and the ip6_ufo_append_data     function in net/ipv6/ip6_output.c.(CVE-2013-4470)

  - Multiple integer overflows in Alchemy LCD frame-buffer     drivers in the Linux kernel before 3.12 allow local     users to create a read-write memory mapping for the     entirety of kernel memory, and consequently gain     privileges, via crafted mmap operations, related to the     (1) au1100fb_fb_mmap function in     drivers/video/au1100fb.c and the (2) au1200fb_fb_mmap     function in drivers/video/au1200fb.c.(CVE-2013-4511)

  - The udp6_ufo_fragment function in     net/ipv6/udp_offload.c in the Linux kernel through     3.12, when UDP Fragmentation Offload (UFO) is enabled,     does not properly perform a certain size comparison     before inserting a fragment header, which allows remote     attackers to cause a denial of service (panic) via a     large IPv6 UDP packet, as demonstrated by use of the     Token Bucket Filter (TBF) queueing     discipline.(CVE-2013-4563)

  - The ath9k_htc_set_bssid_mask function in     drivers/net/wireless/ath/ath9k/htc_drv_main.c in the     Linux kernel through 3.12 uses a BSSID masking approach     to determine the set of MAC addresses on which a Wi-Fi     device is listening, which allows remote attackers to     discover the original MAC address after spoofing by     sending a series of packets to MAC addresses with     certain bit manipulations.(CVE-2013-4579)

  - Array index error in the kvm_vm_ioctl_create_vcpu     function in virt/kvm/kvm_main.c in the KVM subsystem in     the Linux kernel through 3.12.5 allows local users to     gain privileges via a large id value.(CVE-2013-4587)

  - The apic_get_tmcct function in arch/x86/kvm/lapic.c in     the KVM subsystem in the Linux kernel through 3.12.5     allows guest OS users to cause a denial of service     (divide-by-zero error and host OS crash) via crafted     modifications of the TMICT value.(CVE-2013-6367)

  - The KVM subsystem in the Linux kernel through 3.12.5     allows local users to gain privileges or cause a denial     of service (system crash) via a VAPIC synchronization     operation involving a page-end address.(CVE-2013-6368)

  - The recalculate_apic_map function in     arch/x86/kvm/lapic.c in the KVM subsystem in the Linux     kernel through 3.12.5 allows guest OS users to cause a     denial of service (host OS crash) via a crafted ICR     write operation in x2apic mode.(CVE-2013-6376)

  - The lbs_debugfs_write function in     drivers/net/wireless/libertas/debugfs.c in the Linux     kernel through 3.12.1 allows local users to cause a     denial of service (OOPS) by leveraging root privileges     for a zero-length write operation.(CVE-2013-6378)

  - The aac_send_raw_srb function in     drivers/scsi/aacraid/commctrl.c in the Linux kernel     through 3.12.1 does not properly validate a certain     size value, which allows local users to cause a denial     of service (invalid pointer dereference) or possibly     have unspecified other impact via an     FSACTL_SEND_RAW_SRB ioctl call that triggers a crafted     SRB command.(CVE-2013-6380)

  - Multiple buffer underflows in the XFS implementation in     the Linux kernel through 3.12.1 allow local users to     cause a denial of service (memory corruption) or     possibly have unspecified other impact by leveraging     the CAP_SYS_ADMIN capability for a (1)     XFS_IOC_ATTRLIST_BY_HANDLE or (2)     XFS_IOC_ATTRLIST_BY_HANDLE_32 ioctl call with a crafted     length value, related to the xfs_attrlist_by_handle     function in fs/xfs/xfs_ioctl.c and the     xfs_compat_attrlist_by_handle function in     fs/xfs/xfs_ioctl32.c.(CVE-2013-6382)

  - The aac_compat_ioctl function in     drivers/scsi/aacraid/linit.c in the Linux kernel before     3.11.8 does not require the CAP_SYS_RAWIO capability,     which allows local users to bypass intended access     restrictions via a crafted ioctl call.(CVE-2013-6383)

  - The fib6_add function in net/ipv6/ip6_fib.c in the     Linux kernel before 3.11.5 does not properly implement     error-code encoding, which allows local users to cause     a denial of service (NULL pointer dereference and     system crash) by leveraging the CAP_NET_ADMIN     capability for an IPv6 SIOCADDRT ioctl     call.(CVE-2013-6431)

  - The uio_mmap_physical function in drivers/uio/uio.c in     the Linux kernel before 3.12 does not validate the size     of a memory block, which allows local users to cause a     denial of service (memory corruption) or possibly gain     privileges via crafted mmap operations, a different     vulnerability than CVE-2013-4511.(CVE-2013-6763)

  - Multiple race conditions in ipc/shm.c in the Linux     kernel before 3.12.2 allow local users to cause a     denial of service (use-after-free and system crash) or     possibly have unspecified other impact via a crafted     application that uses shmctl IPC_RMID operations in     conjunction with other shm system calls.(CVE-2013-7026)

  - The ieee80211_radiotap_iterator_init function in     net/wireless/radiotap.c in the Linux kernel before     3.11.7 does not check whether a frame contains any data     outside of the header, which might allow attackers to     cause a denial of service (buffer over-read) via a     crafted header.(CVE-2013-7027)

  - The Linux kernel before 3.12.4 updates certain length     values before ensuring that associated data structures     have been initialized, which allows local users to     obtain sensitive information from kernel stack memory     via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system     call, related to net/ipv4/ping.c, net/ipv4/raw.c,     net/ipv4/udp.c, net/ipv6/raw.c, and     net/ipv6/udp.c.(CVE-2013-7263)

  - The l2tp_ip_recvmsg function in net/l2tp/l2tp_ip.c in     the Linux kernel before 3.12.4 updates a certain length     value before ensuring that an associated data structure     has been initialized, which allows local users to     obtain sensitive information from kernel stack memory     via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system     call.(CVE-2013-7264)

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

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - In the Linux kernel through 4.14.13, the     rds_message_alloc_sgs() function does not validate a     value that is used during DMA page allocation, leading     to a heap-based out-of-bounds write (related to the     rds_rdma_extra_size function in     net/rds/rdma.c).(CVE-2018-5332i1/4%0

  - The fib6_add function in net/ipv6/ip6_fib.c in the     Linux kernel before 3.11.5 does not properly implement     error-code encoding, which allows local users to cause     a denial of service (NULL pointer dereference and     system crash) by leveraging the CAP_NET_ADMIN     capability for an IPv6 SIOCADDRT ioctl     call.(CVE-2013-6431i1/4%0

  - A flaw was discovered in the F2FS filesystem code in     fs/f2fs/super.c in the Linux kernel. An out-of-bounds     read or a divide-by-zero error for an incorrect     user_block_count in a corrupted f2fs image can lead to     a denial of service.(CVE-2018-13097i1/4%0

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

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

  - mm/page-writeback.c: do not count anon pages as     dirtyable memory (reclaim stalls).

  - mm/page-writeback.c: fix dirty_balance_reserve     subtraction from dirtyable memory (reclaim stalls).

  - compat_sys_recvmmsg X32 fix (bnc#860993 CVE-2014-0038).

  - hwmon: (coretemp) Fix truncated name of alarm attributes

  - net: fib: fib6_add: fix potential NULL pointer     dereference (bnc#854173 CVE-2013-6431).

  - keys: fix race with concurrent install_user_keyrings()     (bnc#808358)(CVE-2013-1792).

  - KVM: x86: Convert vapic synchronization to _cached     functions (CVE-2013-6368) (bnc#853052 CVE-2013-6368).

  - wireless: radiotap: fix parsing buffer overrun     (bnc#854634 CVE-2013-7027).

  - KVM: x86: fix guest-initiated crash with x2apic     (CVE-2013-6376) (bnc#853053 CVE-2013-6376).

  - KVM: x86: Fix potential divide by 0 in lapic     (CVE-2013-6367) (bnc#853051 CVE-2013-6367).

  - KVM: Improve create VCPU parameter (CVE-2013-4587)     (bnc#853050 CVE-2013-4587).

  - staging: ozwpan: prevent overflow in oz_cdev_write()     (bnc#849023 CVE-2013-4513).

  - perf/x86: Fix offcore_rsp valid mask for SNB/IVB     (bnc#825006).

  - perf/x86: Add Intel IvyBridge event scheduling     constraints (bnc#825006).

  - libertas: potential oops in debugfs (bnc#852559     CVE-2013-6378).

  - aacraid: prevent invalid pointer dereference (bnc#852373     CVE-2013-6380).

  - staging: wlags49_h2: buffer overflow setting station     name (bnc#849029 CVE-2013-4514).

  - net: flow_dissector: fail on evil iph->ihl (bnc#848079     CVE-2013-4348).

  - Staging: bcm: info leak in ioctl (bnc#849034     CVE-2013-4515).

  - Refresh     patches.fixes/net-rework-recvmsg-handler-msg_name-and-ms     g_namelen-logic.patch.

  - ipv6: remove max_addresses check from     ipv6_create_tempaddr (bnc#805226, CVE-2013-0343).

  - net: rework recvmsg handler msg_name and msg_namelen     logic (bnc#854722).

  - crypto: ansi_cprng - Fix off by one error in non-block     size request (bnc#840226).

  - x6: Fix reserve_initrd so that acpi_initrd_override is     reached (bnc#831836).

  - Refresh other Xen patches.

  - aacraid: missing capable() check in compat ioctl     (bnc#852558).

  -     patches.fixes/gpio-ich-fix-ichx_gpio_check_available-ret     urn.patch: Update upstream reference

  - perf/ftrace: Fix paranoid level for enabling function     tracer (bnc#849362).

  - xhci: fix NULL pointer dereference on     ring_doorbell_for_active_rings (bnc#848255).

  - xhci: Fix oops happening after address device timeout     (bnc#848255).

  - xhci: Ensure a command structure points to the correct     trb on the command ring (bnc#848255).

  -     patches.arch/iommu-vt-d-remove-stack-trace-from-broken-i     rq-remapping-warning.patch: Update upstream reference.

  - Allow NFSv4 username mapping to work properly     (bnc#838024).

  - Refresh btrfs attribute publishing patchset to match     openSUSE-13.1 No user-visible changes, but uses     kobj_sysfs_ops and better kobject lifetime management.

  - Fix a few incorrectly checked [io_]remap_pfn_range()     calls (bnc#849021, CVE-2013-4511).

  - drm/radeon: don't set hpd, afmt interrupts when     interrupts are disabled.

  -     patches.fixes/cifs-fill-TRANS2_QUERY_FILE_INFO-ByteCount
    -fields.patch: Fix TRANS2_QUERY_FILE_INFO ByteCount     fields (bnc#804950).

  - iommu: Remove stack trace from broken irq remapping     warning (bnc#844513).

  - Disable patches related to bnc#840656     patches.suse/btrfs-cleanup-don-t-check-the-same-thing-tw     ice     patches.suse/btrfs-0220-fix-for-patch-cleanup-don-t-chec     k-the-same-thi.patch

  - btrfs: use feature attribute names to print better error     messages.

  - btrfs: add ability to change features via sysfs.

  - btrfs: add publishing of unknown features in sysfs.

  - btrfs: publish per-super features to sysfs.

  - btrfs: add per-super attributes to sysfs.

  - btrfs: export supported featured to sysfs.

  - kobject: introduce kobj_completion.

  - btrfs: add ioctls to query/change feature bits online.

  - btrfs: use btrfs_commit_transaction when setting     fslabel.

  - x86/iommu/vt-d: Expand interrupt remapping quirk to     cover x58 chipset (bnc#844513).

  - NFSv4: Fix issues in nfs4_discover_server_trunking     (bnc#811746).

  - iommu/vt-d: add quirk for broken interrupt remapping on     55XX chipsets (bnc#844513).

ID	Name	Product	Family	Published	Updated	Severity
76672	RHEL 6 : MRG (RHSA-2014:0100)	Nessus	Red Hat Local Security Checks	7/22/2014	1/14/2021	medium
124799	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1475)	Nessus	Huawei Local Security Checks	5/13/2019	1/6/2021	high
124817	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1493)	Nessus	Huawei Local Security Checks	5/13/2019	1/6/2021	high
75251	openSUSE Security Update : kernel (openSUSE-SU-2014:0204-1)	Nessus	SuSE Local Security Checks	6/13/2014	1/19/2021	high

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