Bug 1287666 (CVE-2015-8390)

Summary:	CVE-2015-8390 pcre: uninitialized memory read triggered by malformed posix character class (8.38/22)
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	adam.stokes, andrew, carnil, erik-fedora, jgrulich, jorton, lkundrak, mclasen, mmaslano, pmyers, ppisar, rcollet, rmeggins, sardella, slawomir, walters, webstack-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	pcre 8.38	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-02-22 09:50:20 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:	1287667, 1287668, 1287669, 1287670
Bug Blocks:	1287727

Description Adam Mariš 2015-12-02 13:41:20 UTC

It was found that PCRE before 8.38 mishandles the [: and \\ substrings in character classes, which are incorrectly compiled and could cause reading from uninitialized memory or an incorrect error diagnosis, which allows remote attackers to cause a denial of service (uninitialized memory read) or possibly have unspecified other impact via a crafted regular expression.

Comment 1 Adam Mariš 2015-12-02 13:42:20 UTC

Created pcre tracking bugs for this issue:

Affects: fedora-all [bug 1287667]

Comment 2 Adam Mariš 2015-12-02 13:42:30 UTC

Created glib2 tracking bugs for this issue:

Affects: fedora-all [bug 1287669]

Comment 3 Adam Mariš 2015-12-02 13:42:37 UTC

Created mingw-pcre tracking bugs for this issue:

Affects: fedora-all [bug 1287668]
Affects: epel-7 [bug 1287670]

Comment 4 Adam Mariš 2015-12-02 15:24:11 UTC

Corresponds to item 22 in http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markup

Comment 5 Petr Pisar 2015-12-02 16:05:00 UTC

Fixed in upstream with:

commit 084a8fe109a94f6d146c6a7a0e397cc3d40c6b67
Author: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
Date:   Mon Jul 20 16:27:31 2015 +0000

    Fix bug for classes containing \\ sequences.
    
    
    git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1578 2f5784b3-3f2a-0410-8824-
cb99058d5e15

Comment 6 Fedora Update System 2016-01-04 19:54:42 UTC

pcre-8.38-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 7 Tomas Hoger 2016-02-22 09:50:20 UTC

(In reply to Petr Pisar from comment #5)
> Fixed in upstream with:
> 
> commit 084a8fe109a94f6d146c6a7a0e397cc3d40c6b67
> Author: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
> Date:   Mon Jul 20 16:27:31 2015 +0000
> 
> Fix bug for classes containing \\ sequences.

Upstream commit link:

http://vcs.pcre.org/pcre?view=revision&revision=1578

This is a bug, but it does not seem to have any practical security impact.