[SECURITY] [DTSA-26-1] New trackballs packages fix symlink attack

[maulkin at mx0.halon.org.uk (Neil McGovern)]

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Debian Testing Security Advisory DTSA-26-1              December 5th, 2005
secure-testing-team@lists.alioth.debian.org                  Neil McGovern
http://secure-testing-master.debian.net/
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Package        : trackballs
Vulnerability  : symlink attack
Problem-Scope  : remote/local
Debian-specific: No
CVE ID         : None

Ulf Harnhammar notices that that trackballs follows symlinks when running as
gid games. It writes to files such as $HOME/.trackballs/[USERNAME].gmr and
$HOME/.trackballs/settings without checking if they are symlinks somewhere
else. This can be abused for overwriting or creating files wherever the games
group is allowed to do so.

For the testing distribution (etch) this is fixed in version
1.1.1-0.0etch1

For the unstable distribution (sid) this is fixed in version
1.1.1-1

This upgrade is recommended if you use trackballs.

The Debian testing security team does not track security issues for the
stable (sarge) and oldstable (woody) distributions. If stable is vulnerable,
the Debian security team will make an announcement once a fix is ready.

Upgrade Instructions
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To use the Debian testing security archive, add the following lines to
your /etc/apt/sources.list:

deb http://secure-testing.debian.net/debian-secure-testing etch/security-updates main contrib non-free
deb-src http://secure-testing.debian.net/debian-secure-testing etch/security-updates main contrib non-free

Run the following command as root to make apt trust this repository:

wget http://secure-testing-master.debian.net/ziyi-2005-7.asc -O - | sudo apt-key add -

To install the update, run this command as root:

apt-get update && apt-get upgrade

For further information about the Debian testing security team, please refer
to http://secure-testing-master.debian.net/
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