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USN-927-4: nss vulnerability

29 June 2010

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



  • nss - Network Security Service libraries


USN-927-1 fixed vulnerabilities in nss in Ubuntu 9.10. This update provides
the corresponding updates for Ubuntu 8.04 LTS.

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

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

Ubuntu 8.04

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


Related notices

  • USN-1010-1: openjdk-6-jre, icedtea6-plugin, openjdk-6-jre-headless, openjdk-6b18, openjdk-6-jdk, openjdk-6
  • USN-990-2: apache2, apache2-common, apache2.2-common
  • USN-990-1: libssl0.9.8, openssl
  • USN-923-1: openjdk-6-jre, openjdk-6-jre-lib, openjdk-6
  • USN-860-1: apache2, apache2-common, apache2.2-common
  • USN-927-6: nss, libnss3-1d
  • USN-927-1: nss, libnss3-1d