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Ubuntu 12.04 LTS USN-3126-1 Moderate: Kernel Buffer Overflow DoS

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Calendar Grey November 11, 2016
Scroller Ubuntu
The Ubuntu Security Advisory USN-3127-1 reveals critical updates that fix serious kernel vulnerabilities, which might allow unauthorized access or cause Denial of Service (DoS) issues
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Ondrej Kozina discovered that the keyring interface in the Linux kernel

contained a buffer overflow when displaying timeout events via the

/proc/keys interface. A local attacker could use this to cause a denial of

service (system crash). (CVE-2016-7042)

Dmitry Vyukov discovered a use-after-free vulnerability during error

processing in the recvmmsg(2) implementation in the Linux kernel. A remote

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2016-7117)

Topics%20covered

Topics Covered

security advisory denial of service update buffer overflow kernel ubuntu system reboot

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-115-generic   3.2.0-115.157
  linux-image-3.2.0-115-generic-pae  3.2.0-115.157
  linux-image-3.2.0-115-highbank  3.2.0-115.157
  linux-image-3.2.0-115-omap      3.2.0-115.157
  linux-image-3.2.0-115-powerpc-smp  3.2.0-115.157
  linux-image-3.2.0-115-powerpc64-smp  3.2.0-115.157
  linux-image-3.2.0-115-virtual   3.2.0-115.157
  linux-image-generic             3.2.0.115.131
  linux-image-generic-pae         3.2.0.115.131
  linux-image-highbank            3.2.0.115.131
  linux-image-omap                3.2.0.115.131
  linux-image-powerpc             3.2.0.115.131
  linux-image-powerpc-smp         3.2.0.115.131
  linux-image-powerpc64-smp       3.2.0.115.131
  linux-image-virtual             3.2.0.115.131

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-3126-1

CVE-2016-7042, CVE-2016-7117

Severity
important
Lowest
Low
Medium
High
Critical

November 11, 2016

Topics%20covered

Topics Covered

security advisory denial of service update buffer overflow kernel ubuntu system reboot

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157

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