oss-security - CVE request - kernel: btrfs: prevent users from setting ACLs on files they do not own

Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date: Fri, 11 Jun 2010 16:32:41 -0400
From: Dan Rosenberg <dan.j.rosenberg@...il.com>
To: oss-security@...ts.openwall.com
Subject: CVE request - kernel: btrfs: prevent users from setting ACLs on files 
	they do not own

Shi Weihua discovered that btrfs did not check ownership of files
before setting ACLs, allowing any user to set ACLs for any file,
completely bypassing all file permissions.  This wasn't reported as a
security issue, but it seems pretty serious to me (for those who use
btrfs).  See http://lkml.org/lkml/2010/5/17/544 for his original post.

-Dan

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.