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Ubuntu 11.04 LTS: USN-1197-4 Critical: NSS Certificate Threat

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Calendar Grey September 8, 2011
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Upgrade your Ubuntu installation to address NSS vulnerabilities caused by improperly issued certificates that jeopardize system security.
A certificate authority mis-issued fraudulent certificates.

Summary

A certificate authority mis-issued fraudulent certificates.

Software Description:

- nss: Network Security Service libraries

Details:

USN-1197-1 and USN-1197-3 addressed an issue in Firefox and Xulrunner

pertaining to the Dutch Certificate Authority DigiNotar mis-issuing

fraudulent certificates. This update provides the corresponding update

for the Network Security Service libraries (NSS).

Original advisory details:

USN-1197-1

It was discovered that Dutch Certificate Authority DigiNotar, had

mis-issued multiple fraudulent certificates. These certificates could allow

an attacker to perform a "man in the middle" (MITM) attack which would make

the user believe their connection is secure, but is actually being

monitored.

For the protection of its users, Mozilla has removed the DigiNotar

certificate. Sites using certificates issued by DigiNotar will need to seek

another certificate vendor.

We are currently aware of a regression that blocks one...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical Ubuntu certificate authority NSS

Update Instructions

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

Ubuntu 11.04:
  libnss3                         3.12.9+ckbi-1.82-0ubuntu2.1

Ubuntu 10.10:
  libnss3-1d                      3.12.9+ckbi-1.82-0ubuntu0.10.10.3

Ubuntu 10.04 LTS:
  libnss3-1d                      3.12.9+ckbi-1.82-0ubuntu0.10.04.3

After a standard system update you need to restart any applications that
use NSS, such as Thunderbird or Evolution, to make all the necessary
changes.

References

https://ubuntu.com/security/notices/USN-1197-4

https://ubuntu.com/security/notices/USN-1197-1

https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/837557

Severity
critical
Lowest
Low
Medium
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Critical

September 08, 2011

Topics%20covered

Topics Covered

security advisory critical Ubuntu certificate authority NSS

Package Information

https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu2.1
https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu0.10.10.3
https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu0.10.04.3

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