USN-732-1: dash vulnerability

10 March 2009

dash vulnerability

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

  • Ubuntu 8.10
  • Ubuntu 8.04 LTS

Software Description

  • dash

Details

Wolfgang M. Reimer discovered that dash, when invoked as a login shell, would source .profile files from the current directory. Local users may be able to bypass security restrictions and gain root privileges by placing specially crafted .profile files where they might get sourced by other dash users.

Update instructions

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

Ubuntu 8.10
dash - 0.5.4-9ubuntu1.1
Ubuntu 8.04 LTS
dash - 0.5.4-8ubuntu1.1

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

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

References