Bug 1789527 (CVE-2019-15692)

Summary: CVE-2019-15692 tigervnc: Heap buffer overflow triggered from CopyRectDecoder due to incorrect value checks
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: fedora, jgrulich, twaugh, vonsch
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: tigervnc 1.10.1 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-04-16 22:31:49 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: 1789528, 1791747, 1791748, 1819886, 1819887    
Bug Blocks: 1790319    

Description Guilherme de Almeida Suckevicz 2020-01-09 18:33:47 UTC
TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow. Vulnerability could be triggered from CopyRectDecoder due to incorrect value checks. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

Reference and upstream commit:
https://github.com/CendioOssman/tigervnc/commit/996356b6c65ca165ee1ea46a571c32a1dc3c3821

Comment 1 Guilherme de Almeida Suckevicz 2020-01-09 18:34:03 UTC
Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1789528]

Comment 2 Huzaifa S. Sidhpurwala 2020-01-16 12:25:36 UTC
https://github.com/TigerVNC/tigervnc/pull/921

As per upstream " All issues require a successfully authenticated connection though."

Comment 4 errata-xmlrpc 2020-04-16 21:06:28 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1497 https://access.redhat.com/errata/RHSA-2020:1497

Comment 5 Product Security DevOps Team 2020-04-16 22:31:49 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-15692

Comment 6 errata-xmlrpc 2020-09-29 19:27:41 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:3875 https://access.redhat.com/errata/RHSA-2020:3875