USN-1829-1: Linux kernel (EC2) vulnerabilities

16 May 2013

linux-ec2 vulnerabilities

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

  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in the kernel.

Software Description

  • linux-ec2 - Linux kernel for EC2

Details

Mathias Krause discovered an information leak in the Linux kernel’s ISO 9660 CDROM file system driver. A local user could exploit this flaw to examine some of the kernel’s heap memory. (CVE-2012-6549)

Mathias Krause discovered a flaw in xfrm_user in the Linux kernel. A local attacker with NET_ADMIN capability could potentially exploit this flaw to escalate privileges. (CVE-2013-1826)

A buffer overflow was discovered in the Linux Kernel’s USB subsystem for devices reporting the cdc-wdm class. A specially crafted USB device when plugged-in could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2013-1860)

An information leak was discovered in the Linux kernel’s /dev/dvb device. A local user could exploit this flaw to obtain sensitive information from the kernel’s stack memory. (CVE-2013-1928)

An information leak in the Linux kernel’s dcb netlink interface was discovered. A local user could obtain sensitive information by examining kernel stack memory. (CVE-2013-2634)

Update instructions

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

Ubuntu 10.04 LTS
linux-image-2.6.32-352-ec2 - 2.6.32-352.65

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