Bug 1135840 – CVE-2012-6656 glibc: crash in IBM930 decoding

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Bug 1135840 - (CVE-2012-6656) CVE-2012-6656 glibc: crash in IBM930 decoding

Summary:	CVE-2012-6656 glibc: crash in IBM930 decoding

Status:	CLOSED NOTABUG

Aliases:	CVE-2012-6656

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

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

URL:
Whiteboard:	impact=moderate,public=20120523,repor...
Keywords:	Security

Depends On:
Blocks:	1135843
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Reported:	2014-08-31 22:25 EDT by Murray McAllister
Modified:	2015-07-31 03:25 EDT (History)
CC List:	9 users (show)

See Also:
Fixed In Version:	glibc 2.16
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-08-31 22:26:38 EDT
Type:	---
Regression:	---
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Documentation:	---
CRM:
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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Description Murray McAllister 2014-08-31 22:25:22 EDT

A crash was found in the IBM930 decoding:

https://sourceware.org/bugzilla/show_bug.cgi?id=14134
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=6e230d11837f3a

Florian Weimer noted:

"...out-of-bounds reads at a fixed offset relative to the data segment of a DSO, and in all cases I've seen, they were right in the middle of an unmapped segment of the same DSO. This means that these bugs are just crashers, but they can still result in denial-of-service conditions."

This issue has been fixed in version 2.16. The fix is included in Fedora and Red Hat Enterprise Linux 5, 6, and 7.

Reference:

http://seclists.org/oss-sec/2014/q3/466

Statement:

Not vulnerable. This issue does not affect the versions of glibc in Red Hat Enterprise Linux 5, 6, or 7.

Comment 1 Murray McAllister 2014-09-02 02:04:08 EDT

MITRE assigned CVE-2012-6656 to this issue:

http://www.openwall.com/lists/oss-security/2014/09/02/1

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