USN-1283-1: APT vulnerability

Releases

• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04
• Ubuntu 8.04

Packages

• apt - Advanced front-end for dpkg

Details

It was discovered that APT incorrectly handled the Verify-Host
configuration option. If a remote attacker were able to perform a
machine-in-the-middle attack, this flaw could potentially be used to steal
repository credentials. This issue only affected Ubuntu 10.04 LTS and
10.10. (CVE-2011-3634)

USN-1215-1 fixed a vulnerability in APT by disabling the apt-key net-update
option. This update re-enables the option with corrected verification.
Original advisory details:
It was discovered that the apt-key utility incorrectly verified GPG
keys when downloaded via the net-update option. If a remote attacker were
able to perform a machine-in-the-middle attack, this flaw could potentially be
used to install altered packages.

Update instructions

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

Ubuntu 8.04

• apt - 0.7.9ubuntu17.4

Ubuntu 11.04

• apt - 0.8.13.2ubuntu4.3

Ubuntu 10.10

• apt - 0.8.3ubuntu7.3

Ubuntu 10.04

• apt - 0.7.25.3ubuntu9.9

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

References

• CVE-2011-3634