Bug 1285399 (CVE-2015-2328)

Summary:	CVE-2015-2328 pcre: infinite recursion compiling pattern with recursive reference in a group with indefinite repeat (8.36/20)
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	adam.stokes, andrew, carnil, csutherl, databases-maint, dknox, erik-fedora, fedora-mingw, fedora, fidencio, jclere, jdornak, jdoyle, jgrulich, jorton, klember, lgao, lkundrak, marcandre.lureau, mbabacek, mclasen, mmaslano, myarboro, pmyers, ppisar, pslavice, rcollet, rjones, rmeggins, rsvoboda, sardella, slawomir, twalsh, walters, webstack-team, weli
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	pcre 8.36	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-05-11 13:46:33 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:	1128577, 1285401, 1330508, 1330509
Bug Blocks:	1285420

Description Adam Mariš 2015-11-25 14:23:41 UTC

A stack-based buffer overflow vulnerability was found in compile_regex(), triggered via crafted regular expression.

Upstream bug (contains reproducer):

https://bugs.exim.org/show_bug.cgi?id=1515

Upstream patch:

http://vcs.pcre.org/pcre?view=revision&revision=1498

CVE request:

http://www.openwall.com/lists/oss-security/2015/05/31/4

Comment 1 Adam Mariš 2015-11-25 14:25:21 UTC

Created pcre tracking bugs for this issue:

Affects: fedora-all [bug 1285401]

Comment 2 Petr Pisar 2015-11-25 16:11:20 UTC

Upstream fixed it in 8.36. Simple reproducer is crash when compiling /((?(R)a|(?1)))*/ expression.

Comment 3 Petr Pisar 2015-11-25 16:17:40 UTC

This has already been fixed as bug #1128577 in Fedora. No supported Fedora is affected since 2014-08-11.

Comment 4 Tomas Hoger 2016-02-17 21:45:08 UTC

This is not a stack based buffer overflow, but stack overflow, caused by infinite recursion.  The impact of this issue is limited to crash.

The problem was introduced upstream between version 8.12 and 8.13.

Comment 6 errata-xmlrpc 2016-05-11 13:07:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:1025 https://rhn.redhat.com/errata/RHSA-2016-1025.html

Comment 7 errata-xmlrpc 2016-11-15 11:47:11 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2016:2750 https://rhn.redhat.com/errata/RHSA-2016-2750.html