USN-2285-1: Linux kernel (Quantal HWE) vulnerabilities

Releases

• Ubuntu 12.04

Packages

• linux-lts-quantal - Linux hardware enablement kernel from Quantal

Details

Sasha Levin reported a flaw in the Linux kernel's point-to-point protocol
(PPP) when used with the Layer Two Tunneling Protocol (L2TP). A local user
could exploit this flaw to gain administrative privileges. (CVE-2014-4943)

Michael S. Tsirkin discovered an information leak in the Linux kernel's
segmentation of skbs when using the zerocopy feature of vhost-net. A local
attacker could exploit this flaw to gain potentially sensitive information
from kernel memory. (CVE-2014-0131)

Salva Peiró discovered an information leak in the Linux kernel's media-
device driver. A local attacker could exploit this flaw to obtain sensitive
information from kernel memory. (CVE-2014-1739)

An flaw was discovered in the Linux kernel's audit subsystem when auditing
certain syscalls. A local attacker could exploit this flaw to obtain
potentially sensitive single-bit values from kernel memory or cause a
denial of service (OOPS). (CVE-2014-3917)

A flaw was discovered in the Linux kernel's implementation of user
namespaces with respect to inode permissions. A local user could exploit
this flaw by creating a user namespace to gain administrative privileges.
(CVE-2014-4014)

An information leak was discovered in the rd_mcp backend of the iSCSI
target subsystem in the Linux kernel. A local user could exploit this flaw
to obtain sensitive information from ramdisk_mcp memory by leveraging
access to a SCSI initiator. (CVE-2014-4027)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04

• linux-image-3.5.0-54-generic - 3.5.0-54.81~precise1

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

• CVE-2014-0131
• CVE-2014-1739
• CVE-2014-3917
• CVE-2014-4014
• CVE-2014-4027
• CVE-2014-4943

Related notices

• USN-2287-1: linux-lts-saucy, linux-image-3.11.0-26-generic-lpae, linux-image-3.11.0-26-generic
• USN-2283-1: linux-image-3.2.0-67-generic-pae, linux, linux-image-3.2.0-67-virtual, linux-image-3.2.0-67-omap, linux-image-3.2.0-67-powerpc-smp, linux-image-3.2.0-67-generic, linux-image-3.2.0-67-powerpc64-smp, linux-image-3.2.0-67-highbank
• USN-2286-1: linux-image-3.8.0-44-generic, linux-lts-raring
• USN-2289-1: linux-image-3.11.0-26-generic-lpae, linux-image-3.11.0-26-generic, linux
• USN-2284-1: linux-image-3.2.0-1451-omap4, linux-ti-omap4
• USN-2261-1: linux-lts-saucy, linux-image-3.11.0-24-generic, linux-image-3.11.0-24-generic-lpae
• USN-2259-1: linux-image-3.2.0-65-powerpc64-smp, linux-image-3.2.0-65-virtual, linux, linux-image-3.2.0-65-highbank, linux-image-3.2.0-65-omap, linux-image-3.2.0-65-generic, linux-image-3.2.0-65-powerpc-smp, linux-image-3.2.0-65-generic-pae
• USN-2264-1: linux-image-3.11.0-24-generic, linux-image-3.11.0-24-generic-lpae, linux
• USN-2263-1: linux-ti-omap4, linux-image-3.2.0-1450-omap4
• USN-2288-1: linux-image-3.13.0-32-generic, linux-lts-trusty, linux-image-3.13.0-32-generic-lpae
• USN-2290-1: linux-image-3.13.0-32-powerpc-e500, linux-image-3.13.0-32-powerpc-e500mc, linux, linux-image-3.13.0-32-generic-lpae, linux-image-3.13.0-32-powerpc-smp, linux-image-extra-3.13.0-32-generic, linux-image-3.13.0-32-powerpc64-emb, linux-image-3.13.0-32-lowlatency, linux-image-3.13.0-32-generic, linux-image-3.13.0-32-powerpc64-smp
• USN-2335-1: linux-ti-omap4, linux-image-3.2.0-1452-omap4
• USN-2334-1: linux-image-3.2.0-68-powerpc-smp, linux-image-3.2.0-68-omap, linux, linux-image-3.2.0-68-generic-pae, linux-image-3.2.0-68-virtual, linux-image-3.2.0-68-generic, linux-image-3.2.0-68-highbank, linux-image-3.2.0-68-powerpc64-smp
• USN-2313-1: linux-lts-trusty, linux-image-3.13.0-33-generic, linux-image-3.13.0-33-generic-lpae
• USN-2314-1: linux-image-3.13.0-33-powerpc-e500, linux-image-3.13.0-33-powerpc-smp, linux, linux-image-3.13.0-33-powerpc-e500mc, linux-image-3.13.0-33-generic, linux-image-3.13.0-33-generic-lpae, linux-image-3.13.0-33-lowlatency, linux-image-3.13.0-33-powerpc64-smp, linux-image-extra-3.13.0-33-generic, linux-image-3.13.0-33-powerpc64-emb
• USN-2281-1: linux-ec2, linux-image-2.6.32-368-ec2
• USN-2282-1: linux-image-2.6.32-64-versatile, linux-image-2.6.32-64-generic, linux, linux-image-2.6.32-64-lpia, linux-image-2.6.32-64-sparc64-smp, linux-image-2.6.32-64-generic-pae, linux-image-2.6.32-64-preempt, linux-image-2.6.32-64-powerpc, linux-image-2.6.32-64-386, linux-image-2.6.32-64-powerpc-smp, linux-image-2.6.32-64-server, linux-image-2.6.32-64-sparc64, linux-image-2.6.32-64-virtual, linux-image-2.6.32-64-ia64, linux-image-2.6.32-64-powerpc64-smp
• USN-2336-1: linux-lts-trusty, linux-image-3.13.0-35-generic-lpae, linux-image-3.13.0-35-generic
• USN-2337-1: linux-image-3.13.0-35-powerpc64-emb, linux-image-3.13.0-35-powerpc-smp, linux-image-3.13.0-35-lowlatency, linux, linux-image-3.13.0-35-generic, linux-image-3.13.0-35-powerpc64-smp, linux-image-extra-3.13.0-35-generic, linux-image-3.13.0-35-powerpc-e500mc, linux-image-3.13.0-35-generic-lpae, linux-image-3.13.0-35-powerpc-e500