USN-927-6: NSS vulnerability

Publication date

23 July 2010

Overview

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

Releases


Packages

  • 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 machine-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.

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 machine-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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
9.04 jaunty libnss3-1d –  3.12.6-0ubuntu0.9.04.1

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