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USN-988-1: Linux kernel vulnerabilities

17 September 2010

Local root privilege escalations.

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Details

Ben Hawkes discovered that the Linux kernel did not correctly validate
memory ranges on 64bit kernels when allocating memory on behalf of 32bit
system calls. On a 64bit system, a local attacker could perform malicious
multicast getsockopt calls to gain root privileges. (CVE-2010-3081)

Ben Hawkes discovered that the Linux kernel did not correctly filter
registers on 64bit kernels when performing 32bit system calls. On a
64bit system, a local attacker could manipulate 32bit system calls to
gain root privileges. (Ubuntu 6.06 LTS and 8.04 LTS were not affected.)
(CVE-2010-3301)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 9.10
Ubuntu 9.04
Ubuntu 8.04
Ubuntu 6.06
Ubuntu 10.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

Related notices

  • USN-1074-1: linux-fsl-imx51, linux-image-2.6.31-112-imx51
  • USN-1119-1: linux-ti-omap4, linux-image-2.6.35-903-omap4
  • USN-1074-2: linux-fsl-imx51, linux-image-2.6.31-608-imx51
  • USN-1083-1: linux-image-2.6.35-25-generic, linux-image-2.6.35-25-server, linux-image-2.6.35-25-virtual, linux-lts-backport-maverick, linux-image-2.6.35-25-generic-pae
  • USN-1041-1: linux-image-2.6.31-22-sparc64-smp, linux-image-2.6.32-27-versatile, linux-image-2.6.32-27-ia64, linux-image-2.6.32-27-powerpc-smp, linux-image-2.6.35-24-powerpc-smp, linux-image-2.6.31-22-sparc64, linux-image-2.6.35-24-versatile, linux-image-2.6.32-27-powerpc, linux-image-2.6.32-27-powerpc64-smp, linux-image-2.6.31-22-server, linux-image-2.6.35-24-powerpc, linux-image-2.6.32-27-preempt, linux-image-2.6.31-22-lpia, linux-image-2.6.31-22-generic-pae, linux-image-2.6.32-27-386, linux-image-2.6.32-27-sparc64, linux-image-2.6.35-24-powerpc64-smp, linux-image-2.6.32-27-virtual, linux-image-2.6.35-24-server, linux-image-2.6.31-22-386, linux-image-2.6.32-27-sparc64-smp, linux-image-2.6.32-311-ec2, linux-image-2.6.35-24-virtual, linux-image-2.6.32-27-generic-pae, linux-image-2.6.35-24-generic, linux-image-2.6.31-307-ec2, linux-image-2.6.35-24-generic-pae, linux-image-2.6.31-22-powerpc64-smp, linux-image-2.6.31-22-ia64, linux, linux-ec2, linux-image-2.6.31-22-powerpc-smp, linux-image-2.6.31-22-virtual, linux-image-2.6.32-27-generic, linux-image-2.6.32-27-lpia, linux-image-2.6.31-22-powerpc, linux-image-2.6.31-22-generic, linux-image-2.6.32-27-server, linux-image-2.6.35-24-omap

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