Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service, information leak or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2013-0343     George Kargiotakis reported an issue in the temporary     address handling of the IPv6 privacy extensions. Users     on the same LAN can cause a denial of service or obtain     access to sensitive information by sending router     advertisement messages that cause temporary address     generation to be disabled.

  - CVE-2013-2147     Dan Carpenter reported issues in the cpqarray driver for     Compaq Smart2 Controllers and the cciss driver for HP     Smart Array controllers allowing users to gain access to     sensitive kernel memory.

  - CVE-2013-2889     Kees Cook discovered missing input sanitization in the     HID driver for Zeroplus game pads that could lead to a     local denial of service.

  - CVE-2013-2893     Kees Cook discovered that missing input sanitization in     the HID driver for various Logitech force feedback     devices could lead to a local denial of service.

  - CVE-2013-2929     Vasily Kulikov discovered that a flaw in the     get_dumpable() function of the ptrace subsytsem could     lead to information disclosure. Only systems with the     fs.suid_dumpable sysctl set to a non-default value of     '2' are vulnerable.

  - CVE-2013-4162     Hannes Frederic Sowa discovered that incorrect handling     of IPv6 sockets using the UDP_CORK option could result     in denial of service.

  - CVE-2013-4299     Fujitsu reported an issue in the device-mapper     subsystem. Local users could gain access to sensitive     kernel memory.

  - CVE-2013-4345     Stephan Mueller found in bug in the ANSI pseudo random     number generator which could lead to the use of less     entropy than expected.

  - CVE-2013-4512     Nico Golde and Fabian Yamaguchi reported an issue in the     user mode linux port. A buffer overflow condition exists     in the write method for the /proc/exitcode file. Local     users with sufficient privileges allowing them to write     to this file could gain further elevated privileges.

  - CVE-2013-4587     Andrew Honig of Google reported an issue in the KVM     virtualization subsystem. A local user could gain     elevated privileges by passing a large vcpu_id     parameter.

  - CVE-2013-6367     Andrew Honig of Google reported an issue in the KVM     virtualization subsystem. A divide-by-zero condition     could allow a guest user to cause a denial of service on     the host (crash).

  - CVE-2013-6380     Mahesh Rajashekhara reported an issue in the aacraid     driver for storage products from various vendors. Local     users with CAP_SYS_ADMIN privileges could gain further     elevated privileges.

  - CVE-2013-6381     Nico Golde and Fabian Yamaguchi reported an issue in the     Gigabit Ethernet device support for s390 systems. Local     users could cause a denial of service or gain elevated     privileges via the SIOC_QETH_ADP_SET_SNMP_CONTROL ioctl.

  - CVE-2013-6382     Nico Golde and Fabian Yamaguchi reported an issue in the     XFS filesystem. Local users with CAP_SYS_ADMIN     privileges could gain further elevated privileges.

  - CVE-2013-6383     Dan Carpenter reported an issue in the aacraid driver     for storage devices from various vendors. A local user     could gain elevated privileges due to a missing     privilege level check in the aac_compat_ioctl function.

  - CVE-2013-7263 CVE-2013-7264 CVE-2013-7265     mpb reported an information leak in the recvfrom,     recvmmsg and recvmsg system calls. A local user could     obtain access to sensitive kernel memory.

  - CVE-2013-7339     Sasha Levin reported an issue in the RDS network     protocol over Infiniband. A local user could cause a     denial of service condition.

  - CVE-2014-0101     Nokia Siemens Networks reported an issue in the SCTP     network protocol subsystem. Remote users could cause a     denial of service (NULL pointer dereference).

  - CVE-2014-1444     Salva Peiro reported an issue in the FarSync WAN driver.
    Local users with the CAP_NET_ADMIN capability could gain     access to sensitive kernel memory.

  - CVE-2014-1445     Salva Peiro reported an issue in the wanXL serial card     driver. Local users could gain access to sensitive     kernel memory.

  - CVE-2014-1446     Salva Peiro reported an issue in the YAM radio modem     driver. Local users with the CAP_NET_ADMIN capability     could gain access to sensitive kernel memory.

  - CVE-2014-1874     Matthew Thode reported an issue in the SELinux     subsystem. A local user with CAP_MAC_ADMIN privileges     could cause a denial of service by setting an empty     security context on a file.

  - CVE-2014-2039     Martin Schwidefsky reported an issue on s390 systems. A     local user could cause a denial of service (kernel oops)     by executing an application with a linkage stack     instruction.

  - CVE-2014-2523     Daniel Borkmann provided a fix for an issue in the     nf_conntrack_dccp module. Remote users could cause a     denial of service (system crash) or potentially gain     elevated privileges.

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6.

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

* A buffer overflow flaw was found in the way the qeth_snmp_command() function in the Linux kernel's QETH network device driver implementation handled SNMP IOCTL requests with an out-of-bounds length. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2013-6381, Important)

* 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)

* It was found that certain protocol handlers in the Linux kernel's networking implementation could set the addr_len value without initializing the associated data structure. A local, unprivileged user could use this flaw to leak kernel stack memory to user space using the recvmsg, recvfrom, and recvmmsg system calls (CVE-2013-7263, CVE-2013-7265, Low).

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

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

* A buffer overflow flaw was found in the way the qeth_snmp_command() function in the Linux kernel's QETH network device driver implementation handled SNMP IOCTL requests with an out-of-bounds length. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2013-6381, Important)

* 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)

* It was found that certain protocol handlers in the Linux kernel's networking implementation could set the addr_len value without initializing the associated data structure. A local, unprivileged user could use this flaw to leak kernel stack memory to user space using the recvmsg, recvfrom, and recvmmsg system calls (CVE-2013-7263, CVE-2013-7265, Low).

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

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6.4 Extended Update Support.

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

* A flaw was found in the way the Linux kernel's IPv6 implementation handled certain UDP packets when the UDP Fragmentation Offload (UFO) feature was enabled. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2013-4387, Important)

* 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 divide-by-zero flaw was found in the apic_get_tmcct() function in KVM's Local Advanced Programmable Interrupt Controller (LAPIC) implementation. A privileged guest user could use this flaw to crash the host. (CVE-2013-6367, Important)

* A memory corruption flaw was discovered in the way KVM handled virtual APIC accesses that crossed a page boundary. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2013-6368, Important)

* A buffer overflow flaw was found in the way the qeth_snmp_command() function in the Linux kernel's QETH network device driver implementation handled SNMP IOCTL requests with an out-of-bounds length. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2013-6381, Important)

* It was found that the fix for CVE-2012-2375 released via RHSA-2012:1580 accidentally removed a check for small-sized result buffers. A local, unprivileged user with access to an NFSv4 mount with ACL support could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2013-4591, Moderate)

* A format string flaw was found in the Linux kernel's block layer. A privileged, local user could potentially use this flaw to escalate their privileges to kernel level (ring0). (CVE-2013-2851, Low)

Red Hat would like to thank Hannes Frederic Sowa for reporting CVE-2013-4470, Andrew Honig of Google for reporting CVE-2013-6367 and CVE-2013-6368, and Kees Cook for reporting CVE-2013-2851.

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

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

Updated kernel packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 5.9 Extended Update Support.

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

* A buffer overflow flaw was found in the way the qeth_snmp_command() function in the Linux kernel's QETH network device driver implementation handled SNMP IOCTL requests with an out-of-bounds length. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2013-6381, Important)

* 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)

This update also fixes the following bug :

* Running a process in the background on a GFS2 file system could sometimes trigger a glock recursion error that resulted in a kernel panic. This happened when a readpage operation attempted to take a glock that had already been held by another function. To prevent this error, GFS2 now verifies whether the glock is already held when performing the readpage operation. (BZ#1077789)

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

The version of kernel installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2013-6381 advisory.

  - Buffer overflow in the qeth_snmp_command function in drivers/s390/net/qeth_core_main.c in the Linux kernel     through 3.12.1 allows local users to cause a denial of service or possibly have unspecified other impact     via an SNMP ioctl call with a length value that is incompatible with the command-buffer size.
    (CVE-2013-6381)

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

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

The Linux kernel before 3.12.2 does not properly use the get_dumpable function, which allows local users to bypass intended ptrace restrictions or obtain sensitive information from IA64 scratch registers via a crafted application, related to kernel/ptrace.c and arch/ia64/include/asm/processor.h (CVE-2013-2929).

The perf_trace_event_perm function in kernel/trace/trace_event_perf.c in the Linux kernel before 3.12.2 does not properly restrict access to the perf subsystem, which allows local users to enable function tracing via a crafted application (CVE-2013-2930).

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).

Buffer overflow in the exitcode_proc_write function in arch/um/kernel/exitcode.c in the Linux kernel before 3.12 allows local users to cause a denial of service or possibly have unspecified other impact by leveraging root privileges for a write operation (CVE-2013-4512).

Multiple buffer overflows in drivers/staging/wlags49_h2/wl_priv.c in the Linux kernel before 3.12 allow local users to cause a denial of service or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability and providing a long station-name string, related to the (1) wvlan_uil_put_info and (2) wvlan_set_station_nickname functions (CVE-2013-4514).

The bcm_char_ioctl function in drivers/staging/bcm/Bcmchar.c in the Linux kernel before 3.12 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory via an IOCTL_BCM_GET_DEVICE_DRIVER_INFO ioctl call (CVE-2013-4515).

Memory leak in the __kvm_set_memory_region function in virt/kvm/kvm_main.c in the Linux kernel before 3.9 allows local users to cause a denial of service (memory consumption) by leveraging certain device access to trigger movement of memory slots (CVE-2013-4592).

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).

Buffer overflow in the qeth_snmp_command function in drivers/s390/net/qeth_core_main.c in the Linux kernel through 3.12.1 allows local users to cause a denial of service or possibly have unspecified other impact via an SNMP ioctl call with a length value that is incompatible with the command-buffer size (CVE-2013-6381).

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 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).

The updated packages provides a solution for these security issues.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2014-0159 advisory.

    - [exec] ptrace: fix get_dumpable() incorrect tests (Petr Oros) [1039486 1039487] {CVE-2013-2929}
    - [net] ipv6: fix leaking uninitialized port number of offender sockaddr (Florian Westphal) [1035882     1035883] {CVE-2013-6405}
    - [net] inet: fix addr_len/msg->msg_namelen assignment in recv_error functions (Florian Westphal) [1035882     1035883] {CVE-2013-6405}
    - [net] inet: prevent leakage of uninitialized memory to user in recv syscalls (Florian Westphal) [1035882     1035883] {CVE-2013-6405}
    - [net] ipvs: Add boundary check on ioctl arguments (Denys Vlasenko) [1030817 1030818] {CVE-2013-4588}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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

Updated kernel packages that fix multiple security issues, several bugs, and add one enhancement are now available for Red Hat Enterprise Linux 5.

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

* A buffer overflow flaw was found in the way the qeth_snmp_command() function in the Linux kernel's QETH network device driver implementation handled SNMP IOCTL requests with an out-of-bounds length. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2013-6381, Important)

* A flaw was found in the way the ipc_rcu_putref() function in the Linux kernel's IPC implementation handled reference counter decrementing. A local, unprivileged user could use this flaw to trigger an Out of Memory (OOM) condition and, potentially, crash the system. (CVE-2013-4483, Moderate)

* It was found that the Xen hypervisor implementation did not correctly check privileges of hypercall attempts made by HVM guests, allowing hypercalls to be invoked from protection rings 1 and 2 in addition to ring 0. A local attacker in an HVM guest able to execute code on privilege levels 1 and 2 could potentially use this flaw to further escalate their privileges in that guest. Note: Xen HVM guests running unmodified versions of Red Hat Enterprise Linux and Microsoft Windows are not affected by this issue because they are known to only use protection rings 0 (kernel) and 3 (userspace). (CVE-2013-4554, 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)

* It was found that, under specific circumstances, a combination of write operations to write-combined memory and locked CPU instructions may cause a core hang on certain AMD CPUs (for more information, refer to AMD CPU erratum 793 linked in the References section). A privileged user in a guest running under the Xen hypervisor could use this flaw to cause a denial of service on the host system. This update adds a workaround to the Xen hypervisor implementation, which mitigates the AMD CPU issue. Note: this issue only affects AMD Family 16h Models 00h-0Fh Processors. Non-AMD CPUs are not vulnerable. (CVE-2013-6885, Moderate)

* It was found that certain protocol handlers in the Linux kernel's networking implementation could set the addr_len value without initializing the associated data structure. A local, unprivileged user could use this flaw to leak kernel stack memory to user space using the recvmsg, recvfrom, and recvmmsg system calls. (CVE-2013-7263, Low)

* 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)

Red Hat would like to thank Vladimir Davydov of Parallels for reporting CVE-2013-4483 and the Xen project for reporting CVE-2013-4554 and CVE-2013-6885. Upstream acknowledges Jan Beulich as the original reporter of CVE-2013-4554 and CVE-2013-6885.

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

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement. The system must be rebooted for this update to take effect.

* A buffer overflow flaw was found in the way the qeth_snmp_command() function in the Linux kernel's QETH network device driver implementation handled SNMP IOCTL requests with an out-of-bounds length. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.
(CVE-2013-6381, Important)

* A flaw was found in the way the ipc_rcu_putref() function in the Linux kernel's IPC implementation handled reference counter decrementing. A local, unprivileged user could use this flaw to trigger an Out of Memory (OOM) condition and, potentially, crash the system. (CVE-2013-4483, Moderate)

* It was found that the Xen hypervisor implementation did not correctly check privileges of hypercall attempts made by HVM guests, allowing hypercalls to be invoked from protection rings 1 and 2 in addition to ring 0. A local attacker in an HVM guest able to execute code on privilege levels 1 and 2 could potentially use this flaw to further escalate their privileges in that guest. Note: Xen HVM guests running unmodified versions of Scientific Linux and Microsoft Windows are not affected by this issue because they are known to only use protection rings 0 (kernel) and 3 (userspace). (CVE-2013-4554, 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 privileged user in a guest running under the Xen hypervisor could use this flaw to cause a denial of service on the host system. This update adds a workaround to the Xen hypervisor implementation, which mitigates the AMD CPU issue. Note: this issue only affects AMD Family 16h Models 00h-0Fh Processors. Non-AMD CPUs are not vulnerable.
(CVE-2013-6885, Moderate)

* It was found that certain protocol handlers in the Linux kernel's networking implementation could set the addr_len value without initializing the associated data structure. A local, unprivileged user could use this flaw to leak kernel stack memory to user space using the recvmsg, recvfrom, and recvmmsg system calls. (CVE-2013-7263, Low)

* 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)

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

ID	Name	Product	Family	Published	Updated	Severity
73713	Debian DSA-2906-1 : linux-2.6 - privilege escalation/denial of service/information leak	Nessus	Debian Local Security Checks	4/27/2014	1/11/2021	critical
72454	RHEL 6 : kernel (RHSA-2014:0159)	Nessus	Red Hat Local Security Checks	2/12/2014	1/14/2021	medium
72475	Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20140211)	Nessus	Scientific Linux Local Security Checks	2/13/2014	1/14/2021	medium
79000	RHEL 6 : kernel (RHSA-2014:0284)	Nessus	Red Hat Local Security Checks	11/8/2014	1/14/2021	medium
79017	RHEL 5 : kernel (RHSA-2014:0476)	Nessus	Red Hat Local Security Checks	11/8/2014	1/14/2021	medium
191681	CBL Mariner 2.0 Security Update: kernel (CVE-2013-6381)	Nessus	MarinerOS Local Security Checks	3/7/2024	2/10/2025	critical
71511	Mandriva Linux Security Advisory : kernel (MDVSA-2013:291)	Nessus	Mandriva Local Security Checks	12/18/2013	1/6/2021	medium
72437	CentOS 6 : kernel (CESA-2014:0159)	Nessus	CentOS Local Security Checks	2/12/2014	1/4/2021	medium
72469	Oracle Linux 6 : kernel (ELSA-2014-0159)	Nessus	Oracle Linux Local Security Checks	2/13/2014	2/9/2026	medium
72975	RHEL 5 : kernel (RHSA-2014:0285)	Nessus	Red Hat Local Security Checks	3/13/2014	1/14/2021	medium
73012	Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20140312)	Nessus	Scientific Linux Local Security Checks	3/14/2014	1/14/2021	medium

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