Bug 1860361 (CVE-2020-14400)

Summary:	CVE-2020-14400 libvncserver: byte-aligned data is accessed through uint16_t pointers in libvncserver/translate.c
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jadahl, negativo17, oholy, rdieter
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libvncserver 0.9.13	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-07-30 16:30:51 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:	1860362, 1860363
Bug Blocks:	1860332

Description Marian Rehak 2020-07-24 11:25:06 UTC

An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint16_t pointers in libvncserver/translate.c.

Upstream commit:

https://github.com/LibVNC/libvncserver/commit/53073c8d7e232151ea2ecd8a1243124121e10e2d

Comment 1 Marian Rehak 2020-07-24 11:25:43 UTC

Created libvncserver tracking bugs for this issue:

Affects: epel-7 [bug 1860362]
Affects: fedora-all [bug 1860363]

Comment 2 Todd Cullum 2020-07-30 00:13:29 UTC

I've opened general software bugs for this as there is no known exploit path or trust boundary crossed:

https://bugzilla.redhat.com/show_bug.cgi?id=1861929
https://bugzilla.redhat.com/show_bug.cgi?id=1861933
https://bugzilla.redhat.com/show_bug.cgi?id=1861932
https://bugzilla.redhat.com/show_bug.cgi?id=1861930

Comment 3 Todd Cullum 2020-07-30 16:24:48 UTC

Statement:

Red Hat Product Security does not consider this to be a vulnerability as there is no known path of exploitation or cross of a trust boundary.