Bug 1163581 (CVE-2014-8714)

Summary:	CVE-2014-8714 wireshark: TN5250 infinite loop (wnpa-sec-2014-23)
Product:	[Other] Security Response	Reporter:	Murray McAllister <mmcallis>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	huzaifas, jrusnack, lemenkov, phatina, rvokal, sisharma
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	wireshark 1.12.2, wireshark 1.10.11	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-11-20 04:43:10 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:	1163585, 1208005, 1245763
Bug Blocks:	1163586, 1210268

Description Murray McAllister 2014-11-13 04:25:55 UTC

An infinite loop issue was discovered in Wireshark's TN5250 dissector. It may be possible to make Wireshark consume an excessive amount of CPU by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.

This is reported to affect Wireshark versions 1.12.0 to 1.12.1, and 1.10.0 to 1.10.10. It is fixed in versions 1.12.2 and 1.10.11.

https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=10596

The version of Wireshark in Red Hat Enterprise Linux 5 and 6 is older than 1.10.x, and may not be affected. The version of Wireshark in Red Hat Enterprise Linux 7 is affected.

External References:

https://www.wireshark.org/security/wnpa-sec-2014-23.html

Comment 1 Murray McAllister 2014-11-13 04:32:15 UTC

Created wireshark tracking bugs for this issue:

Affects: fedora-all [bug 1163585]

Comment 2 Siddharth Sharma 2014-11-14 12:36:09 UTC

upstream fix
------------

Patch1: https://code.wireshark.org/review/gitweb?p=wireshark.git;a=patch;h=d7174c0fcb19dd31526117298133f7a9767e848e

Comment 3 Fedora Update System 2014-12-04 06:22:07 UTC

wireshark-1.10.11-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Siddharth Sharma 2015-01-14 18:26:56 UTC

Analysis
========

In the code of Wireshark's TN5250 dissector 

If value of length becomes 0 

        while ((offset - start) < sf_length) {
          length = tvb_get_guint8(tvb,offset);
...
          offset += length; // offset = offset + 0 ;
        }

then the value of offset does not increase, which can lead to infinite loop, causing consumption of CPU and memory.

Comment 8 errata-xmlrpc 2015-07-22 07:23:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2015:1460 https://rhn.redhat.com/errata/RHSA-2015-1460.html

Comment 12 errata-xmlrpc 2015-11-19 12:36:13 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2393 https://rhn.redhat.com/errata/RHSA-2015-2393.html

Comment 13 Huzaifa S. Sidhpurwala 2015-11-20 04:43:10 UTC

Statement:

This issue did not affect the version of wireshark as shipped with Red Hat Enterprise Linux 5