Bug 998401 (CVE-2013-4247) - CVE-2013-4247 kernel: cifs: off-by-one bug in build_unc_path_to_root
Summary: CVE-2013-4247 kernel: cifs: off-by-one bug in build_unc_path_to_root
Alias: CVE-2013-4247
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On:
Blocks: 979015
TreeView+ depends on / blocked
Reported: 2013-08-19 08:34 UTC by Prasad Pandit
Modified: 2021-02-17 07:24 UTC (History)
28 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-06-10 05:18:02 UTC

Attachments (Terms of Use)

Description Prasad Pandit 2013-08-19 08:34:33 UTC
Linux kernel built with the Common Internet File System (CONFIG_CIFS) support along with a feature to access Distributed File Systems (CONFIG_CIFS_DFS_UPCALL), is vulnerable to a memory corruption flaw caused by writing one byte past an allocated memory area. It occurs while mounting a DFS share wherein the server provides DFS referral names of certain length. The memory corruption leads to an unresponsive kernel and subsequent crash resulting in Denial of Service.

An user/program able to mount a file system could use this flaw to crash the kernel resulting in DoS.

Upstream fix:
 -> https://git.kernel.org/linus/1fc29bacedeabb278080e31bb9c1ecb49f143c3b

 -> http://www.openwall.com/lists/oss-security/2013/08/14/8

Comment 1 Prasad Pandit 2013-08-19 08:37:48 UTC

This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.

Note You need to log in before you can comment on or make changes to this bug.