Bug 1228220 (CVE-2014-9731) - CVE-2014-9731 Kernel: fs: udf: information leakage when reading symlink
Summary: CVE-2014-9731 Kernel: fs: udf: information leakage when reading symlink
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2014-9731
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1211911
TreeView+ depends on / blocked
 
Reported: 2015-06-04 12:29 UTC by Prasad Pandit
Modified: 2023-05-12 18:24 UTC (History)
29 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A path length checking flaw was found in Linux kernels built with UDF file system (CONFIG_UDF_FS) support. An attacker able to mount a corrupted/malicious UDF file system image could use this flaw to leak kernel memory to user-space.
Clone Of:
Environment:
Last Closed: 2019-06-08 02:41:32 UTC
Embargoed:

Attachments (Terms of Use)

Description Prasad Pandit 2015-06-04 12:29:05 UTC 
Linux kernel built with the UDF file system(CONFIG_UDF_FS) support is
vulnerable to an information leakage issue. It could occur while reading
symlink information from corrupted/malicious udf file system image.

An unprivileged user could use this flaw to leak kernel memory bytes.

Upstream fix:
-------------
   -> https://git.kernel.org/linus/0e5cc9a40ada6046e6bc3bdfcd0c0d7e4b706b14

Reference:
----------
   -> http://www.openwall.com/lists/oss-security/2015/06/03/15
Comment 1 Prasad Pandit 2015-06-04 16:48:35 UTC 
Statement:

This issue affects the versions of the Linux kernel as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Comment 2 Prasad Pandit 2015-06-04 16:49:20 UTC 
This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Comment 3 Prasad Pandit 2015-06-05 05:19:08 UTC 
Acknowledgement:

Red Hat would like to thank Carl H Lunde for reporting this issue.
Comment 5 Wade Mealing 2015-07-16 01:18:26 UTC 
Mitigation:

The UDF filesystem is enabled via loading the UDF kernel module.  The kernel module can be prevented from loading via blacklisting see https://access.redhat.com/solutions/41278 for more information.
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