Ubuntu: 2048-2 Critical: Fetch Memory Leak Security Issue Detected

ubuntu

December 5, 2013

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

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:

Scott Cantor discovered that libcurl incorrectly verified CN and SAN name

fields when digital signature verification was disabled. When libcurl is

being used in this uncommon way by specific applications, an attacker could

exploit this to perform a man in the middle attack to view sensitive

information or alter encrypted communications.

Topics Covered

security advisory critical information exposure ubuntu curl man in the middle libcurl

Update Instructions

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

Ubuntu 13.10:
  libcurl3                        7.32.0-1ubuntu1.1

Ubuntu 13.04:
  libcurl3                        7.29.0-1ubuntu3.3

Ubuntu 12.10:
  libcurl3                        7.27.0-1ubuntu1.5

Ubuntu 12.04 LTS:
  libcurl3                        7.22.0-3ubuntu4.4

Ubuntu 10.04 LTS:
  libcurl3                        7.19.7-1ubuntu1.4

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