Description:
===========================================================Ubuntu Security Notice USN-927-2 April 11, 2010nss regressionhttps://launchpad.net/bugs/559881===========================================================A security issue affects the following Ubuntu releases:Ubuntu 9.10This advisory also applies to the corresponding versions ofKubuntu, Edubuntu, and Xubuntu.The problem can be corrected by upgrading your system to thefollowing package versions:Ubuntu 9.10: libnss3-1d 3.12.6-0ubuntu0.9.10.2After a standard system upgrade you need to restart your session to effectthe necessary changes.Details follow:USN-927-1 fixed vulnerabilities in NSS. Upstream NSS 3.12.6 added anadditional checksum verification on libnssdbm3.so, but the Ubuntu packagingdid not create this checksum. As a result, Firefox could not initialize thesecurity 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.
More...