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USN-1640-1: libssh vulnerabilities

26 November 2012

linssh could be made to crash or run programs if it received specially crafted network traffic.

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Releases

Packages

  • libssh - A tiny C SSH library

Details

Xi Wang and Florian Weimer discovered that libssh incorrectly handled
memory. A remote attacker could use this to cause libssh to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2012-4559, CVE-2012-4560, CVE-2012-4561, CVE-2012-4562)

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 12.10
Ubuntu 12.04
Ubuntu 11.10
Ubuntu 10.04

In general, a standard system update will make all the necessary changes.