Ubuntu Security Notice 1588-1 - It was discovered that the apt-add-repository tool incorrectly validated PPA GPG keys when importing from a keyserver. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to install altered package repository GPG keys.
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Ubuntu Security Notice USN-1588-1
October 01, 2012
software-properties vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
Summary:
Software Properties could be tricked into installing arbitrary PPA GPG keys.
Software Description:
- software-properties: manage the repositories that you install software
from
Details:
It was discovered that the apt-add-repository tool incorrectly validated
PPA GPG keys when importing from a keyserver. If a remote attacker were
able to perform a man-in-the-middle attack, this flaw could be exploited to
install altered package repository GPG keys.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
python-software-properties 0.82.7.3
Ubuntu 11.10:
python-software-properties 0.81.13.5
Ubuntu 11.04:
python-software-properties 0.80.9.2
Ubuntu 10.04 LTS:
python-software-properties 0.75.10.3
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1588-1
https://launchpad.net/bugs/1016643
Package Information:
https://launchpad.net/ubuntu/+source/software-properties/0.82.7.3
https://launchpad.net/ubuntu/+source/software-properties/0.81.13.5
https://launchpad.net/ubuntu/+source/software-properties/0.80.9.2
https://launchpad.net/ubuntu/+source/software-properties/0.75.10.3