USN-1933-1: Linux kernel (OMAP4) vulnerabilities

Ubuntu Security Notice USN-1933-1

20th August, 2013

linux-ti-omap4 vulnerabilities

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

  • Ubuntu 12.10

Summary

Several security issues were fixed in the kernel.

Software description

  • linux-ti-omap4 - Linux kernel for OMAP4

Details

Chanam Park reported a Null pointer flaw in the Linux kernel's Ceph client.
A remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2013-1059)

An information leak was discovered in the Linux kernel's fanotify
interface. A local user could exploit this flaw to obtain sensitive
information from kernel memory. (CVE-2013-2148)

Jonathan Salwan discovered an information leak in the Linux kernel's cdrom
driver. A local user can exploit this leak to obtain sensitive information
from kernel memory if the CD-ROM drive is malfunctioning. (CVE-2013-2164)

Kees Cook discovered a format string vulnerability in the Linux kernel's
disk block layer. A local user with administrator privileges could exploit
this flaw to gain kernel privileges. (CVE-2013-2851)

Update instructions

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

Ubuntu 12.10:
linux-image-3.5.0-231-omap4 3.5.0-231.47

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

CVE-2013-1059, CVE-2013-2148, CVE-2013-2164, CVE-2013-2851