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Ubuntu 12.10: USN-2121-1 Critical: GnuTLS Invalid CA Certificate

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Calendar Grey February 25, 2014
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Ubuntu 2121-2 discusses the recent CVE-2021-XXXX exploit concerning GnuTLS that impacts particular versions, along with required patches for remediation.
GnuTLS incorrectly validated certain intermediate certificates.

Summary

GnuTLS incorrectly validated certain intermediate certificates.

Software Description:

- gnutls26: GNU TLS library

Details:

Suman Jana discovered that GnuTLS incorrectly handled version 1

intermediate certificates. This resulted in them being considered to be a

valid CA certificate by default, which was contrary to documented

behaviour.

Topics%20covered

Topics Covered

security advisory critical issue update Ubuntu gnutls certificate validation CA certificate

Update Instructions

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

Ubuntu 13.10:
  libgnutls26                     2.12.23-1ubuntu4.1

Ubuntu 12.10:
  libgnutls26                     2.12.14-5ubuntu4.5

Ubuntu 12.04 LTS:
  libgnutls26                     2.12.14-5ubuntu3.6

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

References

https://ubuntu.com/security/notices/USN-2121-1

CVE-2014-1959

Severity
critical
Lowest
Low
Medium
High
Critical

February 25, 2014

Topics%20covered

Topics Covered

security advisory critical issue update Ubuntu gnutls certificate validation CA certificate

Package Information

https://launchpad.net/ubuntu/+source/gnutls26/2.12.23-1ubuntu4.1
https://launchpad.net/ubuntu/+source/gnutls26/2.12.14-5ubuntu4.5
https://launchpad.net/ubuntu/+source/gnutls26/2.12.14-5ubuntu3.6

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