Technical Description

Debian has released a security patch to correct two vulnerabilities identified in Cpio. The first flaw is due to a directory traversal error when processing specially crafted cpio archives, which may be exploited by attackers to create files in arbitrary locations on the user's system. The second issue is due to a race condition which allows local users to modify permissions of arbitrary files via a hard link attack on a file while it is being decompressed, whose permissions are changed by cpio after the decompression is complete. For additional information, see : VUPEN/ADV-2005-0812

Affected Products

Debian GNU/Linux old-stable (woody)
Debian GNU/Linux stable (sarge)
Debian GNU/Linux unstable (sid)

Solution

Debian GNU/Linux old-stable (woody) - Upgrade to version 2.4.2-39woody2
Debian GNU/Linux stable (sarge) - Upgrade to version 2.5-1.3
Debian GNU/Linux unstable (sid) - Upgrade to version 2.6-6

References

http://www.vupen.com/english/advisories/2005/1991
http://lists.debian.org/debian-security-announce/debian-security-announce-2005/msg00240.html

ChangeLog

2005-10-10 : Initial release

Vulnerability Management

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