Bug 1228204 (CVE-2015-4167)

Summary:	CVE-2015-4167 Kernel: fs: udf: Check length of extended attributes to avoid oops
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aquini, arm-mgr, bhu, blc, dhoward, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	An inode data validation error 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 cause the kernel to crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:41:30 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1211911

Description Prasad Pandit 2015-06-04 12:02:12 UTC

Linux kernel built with the UDF file system(CONFIG_UDF_FS) support is
vulnerable to a crash. It could occur while fetching inode information from a
corrupted/malicious udf file system image.

An unprivileged user could use this flaw to crash the kernel resulting in DoS.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/23b133bdc452aa441fcb9b82cbf6dd05cfd342d0

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2015/06/03/13

Comment 1 Prasad Pandit 2015-06-04 16:33:13 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 16:33:47 UTC

This has been rated as having Moderate 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 05:18:26 UTC

Acknowledgement:

Red Hat would like to thank Carl H Lunde for reporting this issue.

Comment 4 Wade Mealing 2015-07-24 00:05:18 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.