USN-818-1: curl vulnerability

Ubuntu Security Notice USN-818-1

17th August, 2009

curl vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software description

  • curl


Scott Cantor discovered that Curl did not correctly handle SSL
certificates with zero bytes in the Common Name. A remote attacker could
exploit this to perform a man in the middle attack to view sensitive
information or alter encrypted communications.

Update instructions

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

Ubuntu 9.04:
libcurl3 7.18.2-8ubuntu4.1
Ubuntu 8.10:
libcurl3 7.18.2-1ubuntu4.4
Ubuntu 8.04 LTS:
libcurl3 7.18.0-1ubuntu2.2
Ubuntu 6.06 LTS:
libcurl3 7.15.1-1ubuntu3.2

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the
necessary changes.