Bug 383361 (CVE-2005-4872)

Summary:	CVE-2005-4872 pcre incorrect memory requirement computation
Product:	[Other] Security Response	Reporter:	Josh Bressers <bressers>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-01-11 17:37:28 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:	411731, 413871, 414271
Bug Blocks:	373021

Description Josh Bressers 2007-11-14 20:52:04 UTC

CVE-2006-7224 initially described several integer overflows in pcre, all
described here:
http://scary.beasts.org/security/CESA-2007-006.html

This id should be used to describe issue #2
in that advisory:

2) Uncharacterized crash researching item #1 above: Demo:

(?P<0>)(?P<1>)...fill in this sequence...(?P<3999>)

This does not trigger the integer overflow present in #1 above, but still
crashes with a serious-looking memory error of some kind - possibly a buffer
overflow.

Comment 3 Tomas Hoger 2007-11-15 10:57:02 UTC

Reference in PCRE changelog for version 6.2:

 5. Named capturing subpatterns were not being correctly counted when a pattern
    was compiled. This caused two problems: (a) If there were more than 100
    such subpatterns, the calculation of the memory needed for the whole
    compiled pattern went wrong, leading to an overflow error. (b) Numerical
    back references of the form \12, where the number was greater than 9, were
    not recognized as back references, even though there were sufficient
    previous subpatterns.

Comment 7 Red Hat Product Security 2008-01-11 17:37:28 UTC

This issue was addressed in:

Red Hat Enterprise Linux:
  http://rhn.redhat.com/errata/RHSA-2007-1052.html