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CVE-2011-2724 assignment notification -- samba -- incomplete fix for CVE-2010-0547 issue
From: Jan Lieskovsky <jlieskov () redhat com>
Date: Fri, 29 Jul 2011 17:09:13 +0200
Hello Josh, Steve, vendors,
during creation of automated test case for samba CVE-2010-0547 issue
I have noticed still to be possible mount.cifs to succeed to mount Samba
share to specially-crafted mount point (containing newline character),
potentially resulting into mtab corruption (on systems, where glibc
package was not patched against CVE-2010-0296 flaw yet).
The new CVE identifier of CVE-2011-2724 has been assigned to this issue
(as an incomplete fix for CVE-2010-0547 issue).
Kudos to Tomas Hoger and Jeffrey Layton for their analysis of the issue:
check_mtab() calls check_newline() to check device and directory name.
check_newline() returns EX_USAGE (1) when error is detected, while
check_mtab() expects -1 to indicate an error.
and to Jeffrey Layton again for providing the patch almost immediately:
Thank you && Regards, Jan.
Jan iankko Lieskovsky / Red Hat Security Response Team
- CVE-2011-2724 assignment notification -- samba -- incomplete fix for CVE-2010-0547 issue Jan Lieskovsky (Jul 29)