1. Ubuntu Security Notices
  2. USN-869-1

USN-869-1: Linux kernel vulnerabilities

Publication date

10 December 2009

Overview

Linux kernel vulnerabilities

Releases

Packages

Details

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)

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)

Update instructions

After a standard system upgrade you need to reboot your computer to effect the necessary changes.

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
9.10 karmic linux-image-2.6.31-16-powerpc-smp –  2.6.31-16.53
linux-image-2.6.31-16-server –  2.6.31-16.53
linux-image-2.6.31-16-powerpc64-smp –  2.6.31-16.53
linux-image-2.6.31-16-lpia –  2.6.31-16.53
linux-image-2.6.31-16-386 –  2.6.31-16.53
linux-image-2.6.31-16-generic-pae –  2.6.31-16.53
linux-image-2.6.31-16-sparc64-smp –  2.6.31-16.53
linux-image-2.6.31-16-virtual –  2.6.31-16.53
linux-image-2.6.31-16-sparc64 –  2.6.31-16.53
linux-image-2.6.31-16-ia64 –  2.6.31-16.53
linux-image-2.6.31-16-generic –  2.6.31-16.53
linux-image-2.6.31-16-powerpc –  2.6.31-16.53

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References

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