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USN-2058-1: curl vulnerability

18 December 2013

Fraudulent security certificates could allow sensitive information to be exposed when accessing the Internet.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

  • curl - HTTP, HTTPS, and FTP client and client libraries

Details

Marc Deslauriers discovered that libcurl incorrectly verified CN and SAN
name fields when digital signature verification was disabled in the GnuTLS
backend. When libcurl is being used in this uncommon way by specific
applications, an attacker could exploit this to perform a machine-in-the-middle
attack to view sensitive information or alter encrypted communications.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 13.10
Ubuntu 13.04
Ubuntu 12.10
Ubuntu 12.04

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

References