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[USN-2058-1] curl vulnerability

Posted on 18 December 2013
Ubuntu Security

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Ubuntu Security Notice USN-2058-1
December 18, 2013

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

- Ubuntu 13.10
- Ubuntu 13.04
- Ubuntu 12.10
- Ubuntu 12.04 LTS

Summary:

Fraudulent security certificates could allow sensitive information to be
exposed when accessing the Internet.

Software Description:
- curl: HTTP, HTTPS, and FTP client and client libraries

Details:

Marc Deslauriers discovered that libcurl incorrectly verified CN and SAN
name fields when digital signature verification was disabled in the GnuTL=
S
backend. When libcurl is being used in this uncommon way by specific
applications, an attacker could exploit this to perform a man in the midd=
le
attack to view sensitive information or alter encrypted communications.

Update instructions:

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

Ubuntu 13.10:
libcurl3-gnutls 7.32.0-1ubuntu1.2

Ubuntu 13.04:
libcurl3-gnutls 7.29.0-1ubuntu3.4

Ubuntu 12.10:
libcurl3-gnutls 7.27.0-1ubuntu1.7

Ubuntu 12.04 LTS:
libcurl3-gnutls 7.22.0-3ubuntu4.6

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


References:
http://www.ubuntu.com/usn/usn-2058-1
CVE-2013-6422

Package Information:
https://launchpad.net/ubuntu/+source/curl/7.32.0-1ubuntu1.2
https://launchpad.net/ubuntu/+source/curl/7.29.0-1ubuntu3.4
https://launchpad.net/ubuntu/+source/curl/7.27.0-1ubuntu1.7
https://launchpad.net/ubuntu/+source/curl/7.22.0-3ubuntu4.6

 

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