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USN-1570-1: GnuPG vulnerability

17 September 2012

GnuPG could be tricked into downloading a different key when downloading from a key server.

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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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Releases

Packages

  • gnupg - GNU privacy guard - a free PGP replacement
  • gnupg2 - GNU privacy guard - a free PGP replacement

Details

It was discovered that GnuPG used a short ID when downloading keys from a
keyserver, even if a long ID was requested. An attacker could possibly use
this to return a different key with a duplicate short key id.

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 8.04
Ubuntu 12.04
Ubuntu 11.10
Ubuntu 11.04
Ubuntu 10.04

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