David Ford discovered that the IPv4 defragmentation routine did not correctly handle oversized packets. A remote attacker could send specially crafted traffic that would cause a system to crash, leading to a denial of service. (The fix was included in the earlier kernels from USN-864-1.) (CVE-2009-1298)
Akira Fujita discovered that the Ext4 “move extents” ioctl did not correctly check permissions. A local attacker could exploit this to overwrite arbitrary files on the system, leading to root privilege escalation. (CVE-2009-4131)
10 December 2009
A security issue affects these releases of Ubuntu and its derivatives:
David Ford discovered that the IPv4 defragmentation routine did not correctly handle oversized packets. A remote attacker could send specially crafted traffic that would cause a system to crash, leading to a denial of service. (The fix was included in the earlier kernels from USN-864-1.) (CVE-2009-1298)
Akira Fujita discovered that the Ext4 “move extents” ioctl did not correctly check permissions. A local attacker could exploit this to overwrite arbitrary files on the system, leading to root privilege escalation. (CVE-2009-4131)
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 upgrade you need to reboot your computer to effect the necessary changes.
Vulmon