Ubuntu Security Notice USN-970-1 August 11, 2010
gnupg2 vulnerability
CVE-2010-2547
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A security issue affects the following Ubuntu releases:
Ubuntu 8.04 LTS
Ubuntu 9.04
Ubuntu 9.10
Ubuntu 10.04 LTS
This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.
The problem can be corrected by upgrading your system to the
following package versions:
Ubuntu 8.04 LTS:
gpgsm 2.0.7-1ubuntu0.1
Ubuntu 9.04:
gpgsm 2.0.9-3.1ubuntu0.1
Ubuntu 9.10:
gpgsm 2.0.12-0ubuntu2.1
Ubuntu 10.04 LTS:
gpgsm 2.0.14-1ubuntu1.2
In general, a standard system update will make all the necessary changes.
Details follow:
It was discovered that GPGSM in GnuPG2 did not correctly handle
certificates with a large number of Subject Alternate Names. If a user or
automated system were tricked into processing a specially crafted
certificate, an attacker could cause a denial of service or execute
arbitrary code with privileges of the user invoking the program.