Ubuntu Security Notice USN-255-1
21st February, 2006
openssh vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 5.10
- Ubuntu 5.04
- Ubuntu 4.10
Details
Tomas Mraz discovered a shell code injection flaw in scp. When doing
local-to-local or remote-to-remote copying, scp expanded shell escape
characters. By tricking an user into using scp on a specially crafted
file name (which could also be caught by using an innocuous wild card
like '*'), an attacker could exploit this to execute arbitrary shell
commands with the privilege of that user.
Please be aware that scp is not designed to operate securely on
untrusted file names, since it needs to stay compatible with rcp.
Please use sftp for automated systems and potentially untrusted file
names.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 5.10:
- openssh-client
- Ubuntu 5.04:
- openssh-client
- Ubuntu 4.10:
- openssh-client
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
None