USN-1346-1: curl vulnerability

24 January 2012

curl vulnerability

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

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10


curl could be tricked into injecting arbitrary data if it handled a malicious URL.

Software Description

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


Dan Fandrich discovered that curl incorrectly handled URLs containing embedded or percent-encoded control characters. If a user or automated system were tricked into processing a specially crafted URL, arbitrary data could be injected.

Update instructions

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

Ubuntu 11.10
libcurl3 - 7.21.6-3ubuntu3.2
libcurl3-gnutls - 7.21.6-3ubuntu3.2
libcurl3-nss - 7.21.6-3ubuntu3.2
Ubuntu 11.04
libcurl3 - 7.21.3-1ubuntu1.5
libcurl3-gnutls - 7.21.3-1ubuntu1.5
libcurl3-nss - 7.21.3-1ubuntu1.5
Ubuntu 10.10
libcurl3 - 7.21.0-1ubuntu1.3
libcurl3-gnutls - 7.21.0-1ubuntu1.3

To update your system, please follow these instructions:

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