USN-1721-1: curl vulnerability

12 February 2013

curl vulnerability

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

  • Ubuntu 12.10


curl could be made to crash or run programs if it opened a malicious URL.

Software Description

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


It was discovered that curl incorrectly handled SASL authentication when communicating over POP3, SMTP or IMAP. If a user or automated system were tricked into processing a specially crafted URL, an attacker could cause a denial of service, or possibly execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability to a denial of service.

Update instructions

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

Ubuntu 12.10
libcurl3 - 7.27.0-1ubuntu1.1
libcurl3-gnutls - 7.27.0-1ubuntu1.1
libcurl3-nss - 7.27.0-1ubuntu1.1

To update your system, please follow these instructions:

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