Bug 1418761 (CVE-2016-10207)

Summary:	CVE-2016-10207 tigervnc: VNC server can crash when TLS handshake terminates early
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bphinz, jgrulich, slawomir, twaugh
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:06:51 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, 1418945, 1418946
Bug Blocks:	1386080, 1415638, 1415718

Description Andrej Nemec 2017-02-02 16:36:01 UTC

A vulnerability was found in tigerVNC. The Xvnc server from tigervnc can crash when a client terminates a TLS connection early. This is due to invalid initialization/deinitialization order of the GnuTLS library.

References:

http://seclists.org/oss-sec/2017/q1/297

Upstream patch:

https://github.com/TigerVNC/tigervnc/commit/8aa4bc53206c2430bbf0c8f4b642f59a379ee649

Comment 1 Andrej Nemec 2017-02-02 16:37:12 UTC

Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1415719]

Comment 6 Andrej Nemec 2017-02-06 08:20:44 UTC

CVE assignment:

http://seclists.org/oss-sec/2017/q1/312

Comment 7 errata-xmlrpc 2017-03-21 09:53:25 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 8 errata-xmlrpc 2017-08-01 20:51:27 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