Bug 1415712 (CVE-2017-5581)

Summary:	CVE-2017-5581 tigervnc: Buffer overflow in ModifiablePixelBuffer::fillRect
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	bphinz, jgrulich, slawomir, twaugh
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	tigervnc 1.7.1	Doc Type:	If docs needed, set a value
Doc Text:	A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:05:58 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:	1415719, 1416289, 1416290
Bug Blocks:	1386080, 1415638, 1415718

Description Adam Mariš 2017-01-23 14:10:24 UTC

A buffer overflow vulnerability in ModifiablePixelBuffer::fillRect in vncviewer was found allowing malicious VNC server to send crafted RRE message and possibly take control of the TigerVNC viewer.

Upstream patch:

https://github.com/TigerVNC/tigervnc/commit/18c020124ff1b2441f714da2017f63dba50720ba

PR:

https://github.com/TigerVNC/tigervnc/pull/399

Reference:

http://seclists.org/oss-sec/2017/q1/166

Comment 1 Adam Mariš 2017-01-23 14:17:27 UTC

Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1415719]

Comment 2 Jan Grulich 2017-01-23 17:56:50 UTC

This fix has been merged to tigervnc 1.7.1 which is already included in Fedora and pushed as regular update. Not sure whether I should change the update description and type or leave it as it is.

Comment 9 Adam Mariš 2017-01-25 10:09:51 UTC

CVE assignment:

http://seclists.org/oss-sec/2017/q1/189

Comment 11 errata-xmlrpc 2017-03-21 09:53:11 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:0630 https://rhn.redhat.com/errata/RHSA-2017-0630.html

Comment 12 errata-xmlrpc 2017-08-01 20:51:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2000 https://access.redhat.com/errata/RHSA-2017:2000