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Ubuntu 12.04 LTS USN-2678-1 Critical: Kernel Denial Of Service

ubuntu
Calendar Grey July 24, 2015
Scroller Ubuntu Esm H88
Upgrade the kernel on your Ubuntu 12.04 LTS installation to patch urgent security vulnerabilities and prevent potential system failures.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

A flaw was discovered in the user space memory copying for the pipe iovecs

in the Linux kernel. An unprivileged local user could exploit this flaw to

cause a denial of service (system crash) or potentially escalate their

privileges. (CVE-2015-1805)

Daniel Borkmann reported a kernel crash in the Linux kernel's BPF filter

JIT optimization. A local attacker could exploit this flaw to cause a

denial of service (system crash). (CVE-2015-4700)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-88-generic    3.2.0-88.126
  linux-image-3.2.0-88-generic-pae  3.2.0-88.126
  linux-image-3.2.0-88-highbank   3.2.0-88.126
  linux-image-3.2.0-88-omap       3.2.0-88.126
  linux-image-3.2.0-88-powerpc-smp  3.2.0-88.126
  linux-image-3.2.0-88-powerpc64-smp  3.2.0-88.126
  linux-image-3.2.0-88-virtual    3.2.0-88.126

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

https://ubuntu.com/security/notices/USN-2678-1

CVE-2015-1805, CVE-2015-4700

Severity
critical
Lowest
Low
Medium
High
Critical

July 23, 2015

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-88.126

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