USN-2474-1: curl vulnerability

15 January 2015

curl vulnerability

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


curl could be tricked into adding arbitrary requests when following certain URLs.

Software Description

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


Andrey Labunets discovered that curl incorrectly handled certain URLs when using a proxy server. If a user or automated system were tricked into using a specially crafted URL, an attacker could possibly use this issue to inject arbitrary HTTP requests.

Update instructions

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

Ubuntu 14.10
libcurl3 - 7.37.1-1ubuntu3.2
libcurl3-gnutls - 7.37.1-1ubuntu3.2
libcurl3-nss - 7.37.1-1ubuntu3.2
Ubuntu 14.04 LTS
libcurl3 - 7.35.0-1ubuntu2.3
libcurl3-gnutls - 7.35.0-1ubuntu2.3
libcurl3-nss - 7.35.0-1ubuntu2.3
Ubuntu 12.04 LTS
libcurl3 - 7.22.0-3ubuntu4.12
libcurl3-gnutls - 7.22.0-3ubuntu4.12
libcurl3-nss - 7.22.0-3ubuntu4.12
Ubuntu 10.04 LTS
libcurl3 - 7.19.7-1ubuntu1.11
libcurl3-gnutls - 7.19.7-1ubuntu1.11

To update your system, please follow these instructions:

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