Bug 995839 (CVE-2013-4237)

Summary:	CVE-2013-4237 glibc: Buffer overwrite when using readdir_r on file systems returning file names longer than NAME_MAX characters
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ashankar, btotty, codonell, fweimer, jakub, jkurik, jlieskov, jrusnack, law, mfranc, mmcallis, pfrankli, sardella, schwab, spoyarek
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	An out-of-bounds write flaw was found in the way the glibc's readdir_r() function handled file system entries longer than the NAME_MAX character constant. A remote attacker could provide a specially crafted NTFS or CIFS file system that, when processed by an application using readdir_r(), would cause that application to crash or, potentially, allow the attacker to execute arbitrary code with the privileges of the user running the application.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-10-14 09:42:39 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:	995841, 996227, 1111460
Bug Blocks:	856696, 1101912

Description Jan Lieskovsky 2013-08-11 12:46:37 UTC

An out-of buffer bounds write flaw was found in the way the readdir_r function in glibc, the GNU C Library, handled a directory entry whose file name name contained more byte than the NAME_MAX characters constant indicated. An attacker could provide a specially-crafted (local) NTFS or (remote) CIFS file system that, when processed in an application using the readdir_r() function, would cause that application to crash or, potentially, execute arbitrary code with the privileges of the user running the application.

Upstream bug report:
[1] http://sourceware.org/bugzilla/show_bug.cgi?id=14699

Latest patch proposal:
[2] http://sourceware.org/ml/libc-alpha/2013-05/msg00445.html

Comment 1 Jan Lieskovsky 2013-08-11 12:55:09 UTC

This issue affects the (latest) versions of the glibc package, as shipped with Fedora release of 18 and 19. Please schedule an update.

Comment 2 Jan Lieskovsky 2013-08-11 12:55:41 UTC

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 995841]

Comment 4 Jan Lieskovsky 2013-08-11 13:05:59 UTC

CVE Request:
  http://www.openwall.com/lists/oss-security/2013/08/11/2

Comment 10 Vincent Danen 2013-08-13 14:38:55 UTC

This was assigned CVE-2013-4237:

http://www.openwall.com/lists/oss-security/2013/08/12/8

Comment 11 Siddhesh Poyarekar 2013-08-16 07:46:54 UTC

patch pushed upstream:

http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=91ce40854d0b7f865cf5024ef95a8026b76096f3

Comment 12 Fedora Update System 2013-08-22 00:49:27 UTC

glibc-2.17-13.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 16 Vincent Danen 2014-03-18 16:08:54 UTC

Mitigation:

Do not open untrusted filesystem image files on production systems.

Comment 19 Vincent Danen 2014-06-19 18:20:29 UTC

Statement:

This issue affects the versions of glibc as shipped with Red Hat Enterprise Linux 5. This issue is not planned to be fixed in Red Hat Enterprise Linux 5 as it is now in Production 3 Phase of the support and maintenance life cycle, https://access.redhat.com/support/policy/updates/errata/

Comment 22 Martin Prpič 2014-10-10 08:43:38 UTC

IssueDescription:

An out-of-bounds write flaw was found in the way the glibc's readdir_r() function handled file system entries longer than the NAME_MAX character constant. An attacker could provide a specially crafted NTFS or CIFS file system that, when processed by an application using readdir_r(), would cause that application to crash or, potentially, allow the attacker to execute arbitrary code with the privileges of the user running the application.

Comment 23 errata-xmlrpc 2014-10-14 04:41:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1391 https://rhn.redhat.com/errata/RHSA-2014-1391.html