Bug 1144287 – CVE-2014-6051 libvncserver: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling

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Bug 1144287 - (CVE-2014-6051) CVE-2014-6051 libvncserver: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling

Summary:	CVE-2014-6051 libvncserver: integer overflow flaw, leading to a heap-based bu...

Status:	CLOSED ERRATA

Aliases:	CVE-2014-6051

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=20140923,repor...
Keywords:	Security

Depends On:	1145878 1145879 1145880 1145883 1157668 1157669 1157670 1157671 1184538
Blocks:	1144297 1184533
	Show dependency tree / graph

Reported:	2014-09-19 03:31 EDT by Murray McAllister
Modified:	2015-11-25 05:16 EST (History)
CC List:	19 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-11-11 17:33:29 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2014:1826	normal	SHIPPED_LIVE	Moderate: libvncserver security update	2014-11-11 18:25:37 EST
Red Hat Product Errata	RHSA-2015:0113	normal	SHIPPED_LIVE	Moderate: libvncserver security update	2015-02-02 19:13:42 EST

Groups: None (edit)

Description Murray McAllister 2014-09-19 03:31:08 EDT

An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code on the client.

Upstream commit:

https://github.com/newsoft/libvncserver/commit/045a044e8ae79db9244593fbce154cdf6e843273

Comment 2 Murray McAllister 2014-09-24 00:19:26 EDT

Acknowledgements:

Red Hat would like to thank oCERT for reporting this issue. oCERT acknowledges Nicolas RUFF as the original reporter.

Comment 3 Murray McAllister 2014-09-24 00:20:53 EDT

Public now:

http://seclists.org/oss-sec/2014/q3/639

Comment 4 Murray McAllister 2014-09-24 00:29:11 EDT

Created libvncserver tracking bugs for this issue:

Affects: fedora-all [bug 1145878]
Affects: epel-5 [bug 1145879]
Affects: epel-7 [bug 1145880]

Comment 5 Murray McAllister 2014-09-24 00:48:25 EDT

Created krfb tracking bugs for this issue:

Affects: fedora-all [bug 1145883]

Comment 6 Murray McAllister 2014-09-24 00:50:55 EDT

krfb advisory:

http://www.kde.org/info/security/advisory-20140923-1.txt

Comment 9 Fedora Update System 2014-09-29 00:06:29 EDT

libvncserver-0.9.10-0.6.20140718git9453be42.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2014-10-01 00:23:24 EDT

libvncserver-0.9.10-0.6.20140718git9453be42.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2014-10-03 23:24:59 EDT

libvncserver-0.9.10-0.6.20140718git9453be42.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 13 Fedora Update System 2014-10-08 15:11:22 EDT

krfb-4.11.5-4.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 14 Fedora Update System 2014-10-13 17:38:30 EDT

libvncserver-0.9.10-0.6.20140718git9453be42.el5 has been pushed to the Fedora EPEL 5 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 17 Martin Prpič 2014-11-10 03:57:45 EST

IssueDescription:

An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client.

Comment 18 errata-xmlrpc 2014-11-11 13:25:52 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2014:1826 https://rhn.redhat.com/errata/RHSA-2014-1826.html

Comment 20 errata-xmlrpc 2015-02-02 14:15:28 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 EUS - Server and Compute Node Only

Via RHSA-2015:0113 https://rhn.redhat.com/errata/RHSA-2015-0113.html

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