USN-2792-1: Linux kernel vulnerabilities

Releases

• Ubuntu 12.04

Packages

• linux - Linux kernel

Details

Dmitry Vyukov discovered that the Linux kernel did not properly initialize
IPC object state in certain situations. A local attacker could use this to
escalate their privileges, expose confidential information, or cause a
denial of service (system crash). (CVE-2015-7613)

It was discovered that the Linux kernel did not check if a new IPv6 MTU set
by a user space application was valid. A remote attacker could forge a
route advertisement with an invalid MTU that a user space daemon like
NetworkManager would honor and apply to the kernel, causing a denial of
service. (CVE-2015-0272)

It was discovered that in certain situations, a directory could be renamed
outside of a bind mounted location. An attacker could use this to escape
bind mount containment and gain access to sensitive information.
(CVE-2015-2925)

Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained
hardcoded attributes about the USB devices. An attacker could construct a
fake WhiteHEAT USB device that, when inserted, causes a denial of service
(system crash). (CVE-2015-5257)

Update instructions

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

Ubuntu 12.04

• linux-image-3.2.0-93-omap - 3.2.0-93.133
• linux-image-3.2.0-93-generic - 3.2.0-93.133
• linux-image-3.2.0-93-powerpc-smp - 3.2.0-93.133
• linux-image-3.2.0-93-powerpc64-smp - 3.2.0-93.133
• linux-image-3.2.0-93-virtual - 3.2.0-93.133
• linux-image-3.2.0-93-generic-pae - 3.2.0-93.133
• linux-image-3.2.0-93-highbank - 3.2.0-93.133

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-2015-0272
• CVE-2015-2925
• CVE-2015-5257
• CVE-2015-7613

Related notices

• USN-2776-1: linux-image-3.13.0-66-generic, linux-image-3.13.0-66-powerpc-e500mc, linux-image-extra-3.13.0-66-generic, linux-image-3.13.0-66-powerpc-e500, linux-image-3.13.0-66-powerpc64-smp, linux, linux-image-3.13.0-66-generic-lpae, linux-image-3.13.0-66-lowlatency, linux-image-3.13.0-66-powerpc-smp, linux-image-3.13.0-66-powerpc64-emb
• USN-2797-1: linux-image-3.16.0-52-powerpc-e500mc, linux-lts-utopic, linux-image-3.16.0-52-lowlatency, linux-image-3.16.0-52-powerpc64-smp, linux-image-3.16.0-52-generic, linux-image-3.16.0-52-powerpc-smp, linux-image-3.16.0-52-powerpc64-emb, linux-image-extra-3.16.0-52-generic, linux-image-3.16.0-52-generic-lpae
• USN-2796-1: linux-ti-omap4, linux-image-3.2.0-1473-omap4
• USN-2779-1: linux-image-3.19.0-31-generic, linux-image-3.19.0-31-lowlatency, linux-image-3.19.0-31-generic-lpae, linux-image-3.19.0-31-powerpc-smp, linux-image-3.19.0-31-powerpc64-smp, linux-image-3.19.0-31-powerpc64-emb, linux, linux-image-3.19.0-31-powerpc-e500mc
• USN-2778-1: linux-image-3.19.0-31-generic, linux-image-extra-3.19.0-31-generic, linux-image-3.19.0-31-lowlatency, linux-image-3.19.0-31-generic-lpae, linux-image-3.19.0-31-powerpc-smp, linux-image-3.19.0-31-powerpc64-smp, linux-lts-vivid, linux-image-3.19.0-31-powerpc64-emb, linux-image-3.19.0-31-powerpc-e500mc
• USN-2775-1: linux-image-3.13.0-66-generic, linux-lts-trusty, linux-image-3.13.0-66-generic-lpae
• USN-2795-1: linux-image-3.13.0-67-generic, linux-lts-trusty, linux-image-3.13.0-67-generic-lpae
• USN-2799-1: linux-image-3.19.0-32-powerpc-smp, linux-image-3.19.0-32-powerpc64-smp, linux-image-3.19.0-32-powerpc64-emb, linux-image-3.19.0-32-lowlatency, linux-image-3.19.0-32-powerpc-e500mc, linux, linux-image-3.19.0-32-generic, linux-image-3.19.0-32-generic-lpae
• USN-2798-1: linux-image-3.19.0-32-powerpc-smp, linux-image-3.19.0-32-powerpc64-smp, linux-image-extra-3.19.0-32-generic, linux-image-3.19.0-32-powerpc64-emb, linux-lts-vivid, linux-image-3.19.0-32-lowlatency, linux-image-3.19.0-32-powerpc-e500mc, linux-image-3.19.0-32-generic, linux-image-3.19.0-32-generic-lpae
• USN-2794-1: linux-image-3.13.0-67-generic, linux-image-3.13.0-67-powerpc64-emb, linux-image-3.13.0-67-powerpc-e500, linux-image-extra-3.13.0-67-generic, linux-image-3.13.0-67-lowlatency, linux-image-3.13.0-67-powerpc-smp, linux, linux-image-3.13.0-67-generic-lpae, linux-image-3.13.0-67-powerpc-e500mc, linux-image-3.13.0-67-powerpc64-smp
• USN-2761-1: linux-image-3.13.0-65-powerpc-smp, linux-image-3.13.0-65-powerpc-e500mc, linux-image-3.13.0-65-powerpc64-emb, linux-image-3.13.0-65-generic, linux-image-3.13.0-65-powerpc64-smp, linux-image-extra-3.13.0-65-generic, linux-image-3.13.0-65-lowlatency, linux, linux-image-3.13.0-65-generic-lpae, linux-image-3.13.0-65-powerpc-e500
• USN-2763-1: linux-lts-trusty, linux-image-3.13.0-65-generic-lpae, linux-image-3.13.0-65-generic
• USN-2764-1: linux-image-extra-3.16.0-50-generic, linux-image-3.16.0-50-lowlatency, linux-image-3.16.0-50-generic, linux-image-3.16.0-50-powerpc64-smp, linux-image-3.16.0-50-generic-lpae, linux-image-3.16.0-50-powerpc-smp, linux-image-3.16.0-50-powerpc-e500mc, linux-image-3.16.0-50-powerpc64-emb, linux-lts-utopic
• USN-2765-1: linux-image-3.19.0-30-powerpc-e500mc, linux-image-3.19.0-30-powerpc64-smp, linux-image-3.19.0-30-lowlatency, linux-image-3.19.0-30-powerpc-smp, linux-image-extra-3.19.0-30-generic, linux-image-3.19.0-30-generic-lpae, linux-image-3.19.0-30-powerpc64-emb, linux-image-3.19.0-30-generic, linux-lts-vivid
• USN-2762-1: linux-image-3.19.0-30-powerpc-e500mc, linux-image-3.19.0-30-powerpc64-smp, linux-image-3.19.0-30-lowlatency, linux-image-3.19.0-30-powerpc-smp, linux-image-3.19.0-30-generic-lpae, linux-image-3.19.0-30-powerpc64-emb, linux-image-3.19.0-30-generic, linux