Bug 1197730 – CVE-2015-8984 glibc: potential denial of service in internal_fnmatch()

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Bug 1197730 - (CVE-2015-8984) CVE-2015-8984 glibc: potential denial of service in internal_fnmatch()

Summary:	CVE-2015-8984 glibc: potential denial of service in internal_fnmatch()

Status:	CLOSED ERRATA

Aliases:	CVE-2015-8984

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20150226,reported=2...
Keywords:	Security

Depends On:	1197732 1209107
Blocks:	1187112 1197731 1210268
	Show dependency tree / graph

Reported:	2015-03-02 08:51 EST by Vasyl Kaigorodov
Modified:	2017-08-21 04:06 EDT (History)
CC List:	9 users (show)

See Also:
Fixed In Version:	glibc 2.22
Doc Type:	Bug Fix
Doc Text:	A flaw was found in the way glibc's fnmatch() function processed certain malformed patterns. An attacker able to make an application call this function could use this flaw to crash that application.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-11-24 03:28:01 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Sourceware	17062	None	None	None	Never
Sourceware	18032	None	None	None	Never
Sourceware	18036	None	None	None	Never
Red Hat Product Errata	RHSA-2015:2199	normal	SHIPPED_LIVE	Moderate: glibc security, bug fix, and enhancement update	2015-11-19 03:04:22 EST

Groups: None (edit)

Description Vasyl Kaigorodov 2015-03-02 08:51:43 EST

It was reported [1] that when processing certain malformed patterns, fnmatch can skip over the NUL byte terminating the pattern.  This can potentially result in an application crash if fnmatch hits an unmapped page before encountering a NUL byte.

Upstream bug report:
https://sourceware.org/bugzilla/show_bug.cgi?id=18032

The fix is here:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4a28f4d55a6cc33474c0792fe93b5942d81bf185

[1]: http://seclists.org/oss-sec/2015/q1/689

Comment 1 Vasyl Kaigorodov 2015-03-02 08:53:14 EST

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1197732]

Comment 3 Martin Sebor 2015-05-29 18:45:10 EDT

There are two other related bugs in fnmatch that have been fixed upstream and that need to be backported if 18032 is to be because the test in 18032 depends on those fixes: 
http://sourceware.org/bugzilla/show_bug.cgi?id=17062
and
http://sourceware.org/bugzilla/show_bug.cgi?id=18036

Comment 4 Carlos O'Donell 2015-06-03 00:28:56 EDT

(In reply to Martin Sebor from comment #3)
> There are two other related bugs in fnmatch that have been fixed upstream
> and that need to be backported if 18032 is to be because the test in 18032
> depends on those fixes: 
> http://sourceware.org/bugzilla/show_bug.cgi?id=17062
> and
> http://sourceware.org/bugzilla/show_bug.cgi?id=18036

Both of those look good to me.

Comment 5 Huzaifa S. Sidhpurwala 2015-09-08 03:24:34 EDT

CVE request via:

http://openwall.com/lists/oss-security/2015/09/08/2

Comment 7 errata-xmlrpc 2015-11-18 23:16:52 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2199 https://rhn.redhat.com/errata/RHSA-2015-2199.html

Comment 8 Andrej Nemec 2017-02-15 04:10:43 EST

CVE assignment:

http://seclists.org/oss-sec/2017/q1/437

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