CVE-2014-9710 Information

Description

The Btrfs implementation in the Linux kernel before 3.19 does not ensure that the visible xattr state is consistent with a requested replacement which allows local users to bypass intended ACL settings and gain privileges via standard filesystem operations (1) during an xattr-replacement time window related to a race condition or (2) after an xattr-replacement attempt that fails because the data does not fit.

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339 http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00023.html http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html http://www.openwall.com/lists/oss-security/2015/03/24/11 http://www.securitytracker.com/id/1032418 https://bugzilla.redhat.com/show_bug.cgi?id=1205079 https://github.com/torvalds/linux/commit/5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339