The postinst script in ppp 2.4.4rel on Debian GNU/Linux allows local users to overwrite arbitrary files via a symlink attack on the (1) /tmp/probe-finished or (2) /tmp/ppp-errors temporary file.
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Link | Tags |
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http://lists.debian.org/debian-devel/2008/08/msg00283.html | mailing list |
http://www.securityfocus.com/bid/32740 | vdb entry |