low
2.1
CWE
193 200
Advisory Published
CVE Published
Updated

CVE-2010-2955: Infoleak

First published: Mon Aug 30 2010(Updated: )

Description of problem: This problem was originally tracked down by Brad Spengler. When calling wireless ioctls, if a driver does not correctly validate/shrink iwp-&gt;length, the resulting copy_to_user can leak up to 64K of kernel heap contents. It seems that this is triggerable[1] in 2.6.32 at least on ath5k, but I was not able to track down how. The twisty maze of ioctl handlers stumped me. :) Other drivers I checked did not appear to have any problems, but the potential remains. I'm not sure if this patch is the right approach; it was fixed differently[2] in grsecurity. [1] <a href="http://forums.grsecurity.net/viewtopic.php?f=3&amp;t=2290&amp;start=0">http://forums.grsecurity.net/viewtopic.php?f=3&amp;t=2290&amp;start=0</a> [2] <a href="http://grsecurity.net/~spender/wireless-infoleak-fix2.patch">http://grsecurity.net/~spender/wireless-infoleak-fix2.patch</a> Discussion: <a href="http://lkml.org/lkml/2010/8/27/413">http://lkml.org/lkml/2010/8/27/413</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
debian/linux-2.6
Linux Kernel<2.6.36
Linux Kernel=2.6.36
Linux Kernel=2.6.36-rc1
Linux Kernel=2.6.36-rc2
openSUSE=11.1
SUSE Linux Enterprise Desktop with Beagle=11
SUSE Linux Enterprise Real Time Extension=11-sp1
SUSE Linux Enterprise Server=11
Ubuntu=6.06
Ubuntu=8.04
Ubuntu=9.04
Ubuntu=9.10
Ubuntu=10.04
Ubuntu=10.10

Remedy

http://lkml.org/lkml/2010/8/27/413

Remedy

http://lkml.org/lkml/2010/8/30/127

Remedy

http://lkml.org/lkml/2010/8/30/146

Remedy

http://lkml.org/lkml/2010/8/30/351

Remedy

http://www.openwall.com/lists/oss-security/2010/08/31/1

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2010-2955?

    CVE-2010-2955 has a moderate severity level due to potential information disclosure vulnerabilities.

  • How do I fix CVE-2010-2955?

    To fix CVE-2010-2955, apply the latest patches for the affected versions of the Linux kernel.

  • Which versions are affected by CVE-2010-2955?

    CVE-2010-2955 affects Linux kernel versions prior to 2.6.36 and various versions of Ubuntu and SUSE.

  • Can CVE-2010-2955 be exploited remotely?

    Yes, CVE-2010-2955 can potentially be exploited remotely if a malicious actor can access the vulnerable driver.

  • What are the consequences of CVE-2010-2955?

    Successful exploitation of CVE-2010-2955 may lead to the disclosure of sensitive information from the kernel memory.

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