USN-2045-1: Linux kernel vulnerabilities
3 December 2013
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 13.04
Several security issues were fixed in the kernel.
- linux - Linux kernel
A flaw was discovered in the Linux kernel’s dm snapshot facility. A remote authenticated user could exploit this flaw to obtain sensitive information or modify/corrupt data. (CVE-2013-4299)
Alan Chester reported a flaw in the IPv6 Stream Control Transmission Protocol (SCTP) of the Linux kernel. A remote attacker could exploit this flaw to obtain sensitive information by sniffing network traffic. (CVE-2013-4350)
Dmitry Vyukov reported a flaw in the Linux kernel’s handling of IPv6 UDP Fragmentation Offload (UFO) processing. A remote attacker could leverage this flaw to cause a denial of service (system crash). (CVE-2013-4387)
A flaw was discovered in the Linux kernel’s fib6 error-code encoding for IPv6. A local user with the CAT_NET_ADMIN capability could exploit this flaw to cause a denial of service (system crash). (CVE-2013-6431)
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.