USN-818-1: curl vulnerability

17 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 versions:

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.