USN-927-6: NSS vulnerability

23 July 2010

nss vulnerability

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

  • Ubuntu 9.04

Summary

Under certain conditions, an attacker could execute commands in web applications using your authenticated credentials.

Software Description

  • nss - Network Security Service libraries

Details

USN-927-1 fixed vulnerabilities in NSS on Ubuntu 9.10. This update provides the corresponding updates for Ubuntu 9.04.

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 9.04
libnss3-1d - 3.12.6-0ubuntu0.9.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References