Bug 1790313 (CVE-2019-15693) - CVE-2019-15693 tigervnc: Heap buffer overflow in TightDecoder::FilterGradient
Summary: CVE-2019-15693 tigervnc: Heap buffer overflow in TightDecoder::FilterGradient
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-15693
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: 1790314 1791762 1791763 1819882 1819883
Blocks: 1790319
TreeView+ depends on / blocked
 
Reported: 2020-01-13 06:11 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
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-04-16 22:31:55 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 19:27:55 UTC

Description Pedro Sampaio 2020-01-13 06:11:27 UTC 
TigerVNC version prior to 1.10.1 is vulnerable to heap buffer overflow, which occurs in TightDecoder::FilterGradient. 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/b4ada8d0c6dac98c8b91fc64d112569a8ae5fb95

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 06:11:46 UTC 
Created tigervnc tracking bugs for this issue:

Affects: fedora-all [bug 1790314]
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 22:31:55 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-2019-15693
Comment 5 errata-xmlrpc 2020-09-29 19:27:52 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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