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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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:
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.