USN-2797-1: Linux kernel (Utopic HWE) vulnerabilities

Releases

• Ubuntu 14.04 ESM

Packages

• linux-lts-utopic - Linux hardware enablement kernel from Utopic

Details

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)

It was discovered that the SCTP protocol implementation in the Linux kernel
performed an incorrect sequence of protocol-initialization steps. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2015-5283)

Update instructions

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

Ubuntu 14.04

• linux-image-3.16.0-52-generic - 3.16.0-52.71~14.04.1
• linux-image-3.16.0-52-generic-lpae - 3.16.0-52.71~14.04.1
• linux-image-3.16.0-52-lowlatency - 3.16.0-52.71~14.04.1
• linux-image-3.16.0-52-powerpc-e500mc - 3.16.0-52.71~14.04.1
• linux-image-3.16.0-52-powerpc-smp - 3.16.0-52.71~14.04.1
• linux-image-3.16.0-52-powerpc64-emb - 3.16.0-52.71~14.04.1
• linux-image-3.16.0-52-powerpc64-smp - 3.16.0-52.71~14.04.1

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-2015-5283

Related notices

• USN-2776-1: linux-image-3.13.0-66-powerpc-e500mc, linux, linux-image-3.13.0-66-powerpc-smp, linux-image-3.13.0-66-powerpc-e500, linux-image-3.13.0-66-lowlatency, linux-image-extra-3.13.0-66-generic, linux-image-3.13.0-66-generic-lpae, linux-image-3.13.0-66-powerpc64-smp, linux-image-3.13.0-66-powerpc64-emb, linux-image-3.13.0-66-generic
• USN-2796-1: linux-ti-omap4, linux-image-3.2.0-1473-omap4
• USN-2779-1: linux-image-3.19.0-31-powerpc-e500mc, linux, linux-image-3.19.0-31-powerpc-smp, linux-image-3.19.0-31-lowlatency, linux-image-3.19.0-31-powerpc64-emb, linux-image-3.19.0-31-generic-lpae, linux-image-3.19.0-31-powerpc64-smp, linux-image-3.19.0-31-generic
• USN-2778-1: linux-image-3.19.0-31-powerpc-e500mc, linux-image-extra-3.19.0-31-generic, linux-image-3.19.0-31-powerpc-smp, linux-image-3.19.0-31-lowlatency, linux-image-3.19.0-31-powerpc64-emb, linux-image-3.19.0-31-generic-lpae, linux-lts-vivid, linux-image-3.19.0-31-powerpc64-smp, linux-image-3.19.0-31-generic
• USN-2775-1: linux-image-3.13.0-66-generic-lpae, linux-lts-trusty, linux-image-3.13.0-66-generic
• USN-2792-1: linux, linux-image-3.2.0-93-highbank, linux-image-3.2.0-93-powerpc-smp, linux-image-3.2.0-93-virtual, linux-image-3.2.0-93-generic, linux-image-3.2.0-93-omap, linux-image-3.2.0-93-generic-pae, linux-image-3.2.0-93-powerpc64-smp
• USN-2795-1: linux-image-3.13.0-67-generic-lpae, linux-image-3.13.0-67-generic, linux-lts-trusty
• USN-2799-1: linux, linux-image-3.19.0-32-powerpc64-smp, linux-image-3.19.0-32-powerpc-e500mc, linux-image-3.19.0-32-generic, linux-image-3.19.0-32-powerpc-smp, linux-image-3.19.0-32-powerpc64-emb, linux-image-3.19.0-32-lowlatency, linux-image-3.19.0-32-generic-lpae
• USN-2798-1: linux-image-extra-3.19.0-32-generic, linux-image-3.19.0-32-powerpc64-smp, linux-image-3.19.0-32-powerpc-e500mc, linux-image-3.19.0-32-generic, linux-image-3.19.0-32-powerpc64-emb, linux-lts-vivid, linux-image-3.19.0-32-generic-lpae, linux-image-3.19.0-32-lowlatency, linux-image-3.19.0-32-powerpc-smp
• USN-2794-1: linux-image-3.13.0-67-generic-lpae, linux-image-3.13.0-67-powerpc-e500, linux, linux-image-extra-3.13.0-67-generic, linux-image-3.13.0-67-powerpc64-emb, linux-image-3.13.0-67-powerpc64-smp, linux-image-3.13.0-67-powerpc-e500mc, linux-image-3.13.0-67-powerpc-smp, linux-image-3.13.0-67-lowlatency, linux-image-3.13.0-67-generic
• USN-2823-1: linux-image-3.13.0-71-lowlatency, linux, linux-image-3.13.0-71-powerpc64-emb, linux-image-3.13.0-71-powerpc-e500, linux-image-3.13.0-71-powerpc-e500mc, linux-image-3.13.0-71-generic, linux-image-3.13.0-71-powerpc-smp, linux-image-3.13.0-71-powerpc64-smp, linux-image-extra-3.13.0-71-generic, linux-image-3.13.0-71-generic-lpae
• USN-2829-1: linux-image-3.19.0-39-generic, linux, linux-image-3.19.0-39-generic-lpae, linux-image-3.19.0-39-powerpc64-emb, linux-image-3.19.0-39-lowlatency, linux-image-3.19.0-39-powerpc-e500mc, linux-image-3.19.0-39-powerpc64-smp, linux-image-3.19.0-39-powerpc-smp
• USN-2826-1: linux-image-3.13.0-71-generic, linux-image-3.13.0-71-generic-lpae, linux-lts-trusty
• USN-2829-2: linux-image-3.19.0-39-generic, linux-image-3.19.0-39-generic-lpae, linux-image-3.19.0-39-powerpc64-emb, linux-lts-vivid, linux-image-3.19.0-39-lowlatency, linux-image-3.19.0-39-powerpc-e500mc, linux-image-3.19.0-39-powerpc64-smp, linux-image-3.19.0-39-powerpc-smp, linux-image-extra-3.19.0-39-generic