Several security issues were fixed in the kernel.
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)
15 May 2013
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in the kernel.
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)
The problem can be corrected by updating your system to the following package versions:
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.
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