USN-507-1: tcp-wrappers vulnerability

29 August 2007

tcp-wrappers vulnerability

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

  • Ubuntu 7.04

Software Description

  • tcp-wrappers


It was discovered that the TCP wrapper library was incorrectly allowing connections to services that did not specify server-side connection details. Remote attackers could connect to services that had been configured to block such connections. This only affected Ubuntu Feisty.

Update instructions

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

Ubuntu 7.04
libwrap0 - 7.6.dbs-11ubuntu0.1

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.