USN-927-2: NSS regression

11 April 2010

nss regression

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

  • Ubuntu 9.10

Software Description

  • nss


USN-927-1 fixed vulnerabilities in NSS. Upstream NSS 3.12.6 added an additional checksum verification on, but the Ubuntu packaging did not create this checksum. As a result, Firefox could not initialize the security component when the NSS Internal FIPS PKCS #11 Module was enabled. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user’s session. This update adds support for the new new renegotiation extension and will use it when the server supports it.

Update instructions

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

Ubuntu 9.10
libnss3-1d - 3.12.6-0ubuntu0.9.10.2

To update your system, please follow these instructions:

After a standard system upgrade you need to restart your session to effect the necessary changes.