USN-2415-1: Linux kernel vulnerability

25 November 2014

linux vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 10.04 LTS

Summary

The system could be made to deny write access to files.

Software Description

  • linux - Linux kernel

Details

Don Bailey discovered a flaw in the LZO decompress algorithm used by the Linux kernel. An attacker could exploit this flaw to cause a denial of service (memory corruption or OOPS). (CVE-2014-4608)

Andy Lutomirski discovered that the Linux kernel was not checking the CAP_SYS_ADMIN when remounting filesystems to read-only. A local user could exploit this flaw to cause a denial of service (loss of writability). (CVE-2014-7975)

Update instructions

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

Ubuntu 10.04 LTS
linux-image-2.6.32-68-386 - 2.6.32-68.135
linux-image-2.6.32-68-generic - 2.6.32-68.135
linux-image-2.6.32-68-generic-pae - 2.6.32-68.135
linux-image-2.6.32-68-ia64 - 2.6.32-68.135
linux-image-2.6.32-68-lpia - 2.6.32-68.135
linux-image-2.6.32-68-powerpc - 2.6.32-68.135
linux-image-2.6.32-68-powerpc-smp - 2.6.32-68.135
linux-image-2.6.32-68-powerpc64-smp - 2.6.32-68.135
linux-image-2.6.32-68-preempt - 2.6.32-68.135
linux-image-2.6.32-68-server - 2.6.32-68.135
linux-image-2.6.32-68-sparc64 - 2.6.32-68.135
linux-image-2.6.32-68-sparc64-smp - 2.6.32-68.135
linux-image-2.6.32-68-versatile - 2.6.32-68.135
linux-image-2.6.32-68-virtual - 2.6.32-68.135

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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