curl could be tricked into injecting arbitrary data if it handled a malicious URL.
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.
24 January 2012
A security issue affects these releases of Ubuntu and its derivatives:
curl could be tricked into injecting arbitrary data if it handled a malicious URL.
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.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.