USN-451-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-451-1

10th April, 2007

linux-source-2.6.15/2.6.17 vulnerabilities

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

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS

Details

The kernel key management code did not correctly handle key reuse. A
local attacker could create many key requests, leading to a denial of
service. (CVE-2007-0006)

The kernel NFS code did not correctly validate NFSACL2 ACCESS requests.
If a system was serving NFS mounts, a remote attacker could send a
specially crafted packet, leading to a denial of service.
(CVE-2007-0772)

When dumping core, the kernel did not correctly handle PT_INTERP
processes. A local attacker could create situations where they could
read the contents of otherwise unreadable executable programs.
(CVE-2007-0958)

Update instructions

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

Ubuntu 6.10:
linux-image-2.6.17-11-generic 2.6.17.1-11.37
linux-image-2.6.17-11-server-bigiron 2.6.17.1-11.37
linux-image-2.6.17-11-sparc64-smp 2.6.17.1-11.37
linux-image-2.6.17-11-powerpc 2.6.17.1-11.37
linux-image-2.6.17-11-386 2.6.17.1-11.37
linux-image-2.6.17-11-powerpc-smp 2.6.17.1-11.37
linux-image-2.6.17-11-sparc64 2.6.17.1-11.37
linux-image-2.6.17-11-server 2.6.17.1-11.37
linux-image-2.6.17-11-powerpc64-smp 2.6.17.1-11.37
Ubuntu 6.06 LTS:
linux-image-2.6.15-28-amd64-generic 2.6.15-28.53
linux-image-2.6.15-28-powerpc-smp 2.6.15-28.53
linux-image-2.6.15-28-amd64-k8 2.6.15-28.53
linux-image-2.6.15-28-686 2.6.15-28.53
linux-image-2.6.15-28-powerpc64-smp 2.6.15-28.53
linux-image-2.6.15-28-server-bigiron 2.6.15-28.53
linux-image-2.6.15-28-sparc64-smp 2.6.15-28.53
linux-image-2.6.15-28-server 2.6.15-28.53
linux-image-2.6.15-28-k7 2.6.15-28.53
linux-image-2.6.15-28-amd64-server 2.6.15-28.53
linux-image-2.6.15-28-amd64-xeon 2.6.15-28.53
linux-image-2.6.15-28-386 2.6.15-28.53
linux-image-2.6.15-28-powerpc 2.6.15-28.53
linux-image-2.6.15-28-sparc64 2.6.15-28.53

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.

References

CVE-2007-0006, CVE-2007-0772, CVE-2007-0958