USN-1531-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1531-1

10th August, 2012

linux vulnerabilities

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

  • Ubuntu 11.04

Summary

Several security issues were fixed in the kernel.

Software description

  • linux - Linux kernel

Details

An error was discovered in the Linux kernel's network TUN/TAP device
implementation. A local user with access to the TUN/TAP interface (which is
not available to unprivileged users until granted by a root user) could
exploit this flaw to crash the system or potential gain administrative
privileges. (CVE-2012-2136)

A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS)
protocol implementation. A local, unprivileged user could use this flaw to
cause a denial of service. (CVE-2012-2372)

An error was discovered in the Linux kernel's memory subsystem (hugetlb).
An unprivileged local user could exploit this flaw to cause a denial of
service (crash the system). (CVE-2012-2390)

Update instructions

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

Ubuntu 11.04:
linux-image-2.6.38-15-powerpc 2.6.38-15.65
linux-image-2.6.38-15-omap 2.6.38-15.65
linux-image-2.6.38-15-generic-pae 2.6.38-15.65
linux-image-2.6.38-15-server 2.6.38-15.65
linux-image-2.6.38-15-powerpc64-smp 2.6.38-15.65
linux-image-2.6.38-15-virtual 2.6.38-15.65
linux-image-2.6.38-15-versatile 2.6.38-15.65
linux-image-2.6.38-15-generic 2.6.38-15.65
linux-image-2.6.38-15-powerpc-smp 2.6.38-15.65

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.

References

CVE-2012-2136, CVE-2012-2372, CVE-2012-2390