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Date: Wed, 23 Dec 2009 11:50:16 +0100
From: Hanno Böck <hanno@...eck.de>
To: OSS Security List <oss-security@...ts.openwall.com>
Subject: CVE request: acl 2.2.47 always follows symlinks
setfacl/getfacl (part of package acl-2.2.47) contains a bug that it ignores
the --physical/-P parameter that means don't follow symlinks on -R
(recursive).
This can lead to security problems, e.g. if there's a cron script giving a
user full rwX rights for a directory, he can put a symlink there pointing to /
or /etc or whatever.
Another scenario would be a backup script saving the /home acls to a file,
every user can create an endless loop for that and prevent the script from
completing.
http://oss.sgi.com/bugzilla/show_bug.cgi?id=790
http://bugs.gentoo.org/show_bug.cgi?id=265425
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=499076
Fixed in upstream source, but no new release yet.
Please assign a CVE.
--
Hanno Böck Blog: http://www.hboeck.de/
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