Bug 1790315 (CVE-2019-15694) - CVE-2019-15694 tigervnc: Heap buffer overflow in DecodeManager::decodeRect
Summary: CVE-2019-15694 tigervnc: Heap buffer overflow in DecodeManager::decodeRect
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-15694
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1790316 1791767 1791768 1819879 1819880
Blocks: 1790319
TreeView+ depends on / blocked
 
Reported: 2020-01-13 06:13 UTC by Pedro Sampaio
Modified: 2020-09-29 19:27 UTC (History)
4 users (show)

Fixed In Version: tigervnc 1.10.1
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2020-04-16 22:31:58 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:1497 0 None None None 2020-04-16 21:06:33 UTC
Red Hat Product Errata RHSA-2020:3875 0 None None None 2020-09-29 19:27:53 UTC

Description Pedro Sampaio 2020-01-13 06:13:58 UTC 
TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which could be triggered from DecodeManager::decodeRect. Vulnerability occurs due to the signdness error in processing MemOutStream. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

Upstream patch:

https://github.com/CendioOssman/tigervnc/commit/0943c006c7d900dfc0281639e992791d6c567438

References:

https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1
https://www.openwall.com/lists/oss-security/2019/12/20/2
Comment 1 Pedro Sampaio 2020-01-13 06:14:18 UTC 
Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1790316]
Comment 3 errata-xmlrpc 2020-04-16 21:06:32 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 4 Product Security DevOps Team 2020-04-16 22:31:58 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-2019-15694
Comment 5 errata-xmlrpc 2020-09-29 19:27:50 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
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