USN-228-1: curl library vulnerability

13 December 2005

curl vulnerability

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

  • Ubuntu 5.10
  • Ubuntu 5.04
  • Ubuntu 4.10

Software Description

Details

Stefan Esser discovered several buffer overflows in the handling of URLs. By attempting to load an URL with a specially crafted invalid hostname, a local attacker could exploit this to execute arbitrary code with the privileges of the application that uses the cURL library.

It is not possible to trick cURL into loading a malicious URL with an HTTP redirect, so this vulnerability was usually not exploitable remotely. However, it could be exploited locally to e. g. circumvent PHP security restrictions.

Update instructions

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

Ubuntu 5.10
libcurl2
libcurl3
Ubuntu 5.04
libcurl2
libcurl3
Ubuntu 4.10
libcurl2
libcurl3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

References