Bug 1811948 (CVE-2019-15690) - CVE-2019-15690 libvncserver: HandleCursorShape() integer overflow resulting in heap-based buffer overflow
Summary: CVE-2019-15690 libvncserver: HandleCursorShape() integer overflow resulting i...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-15690
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
: CVE-2019-20788 (view as bug list)
Depends On: 1811950 1811951 1814339 1814340 1814341 1814342 1814343 1814745
Blocks: 1811953 1829873
TreeView+ depends on / blocked
 
Reported: 2020-03-10 09:53 UTC by Michael Kaplan
Modified: 2021-02-16 20:29 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2020-03-23 10:32:26 UTC
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:0913 0 None None None 2020-03-23 08:43:05 UTC
Red Hat Product Errata RHSA-2020:0920 0 None None None 2020-03-23 08:47:00 UTC
Red Hat Product Errata RHSA-2020:0921 0 None None None 2020-03-23 08:32:25 UTC

Description Michael Kaplan 2020-03-10 09:53:47 UTC
An integer overflow within the HandleCursorShape() function in libvncclient/cursor.c can be exploited to cause a heap-based buffer overflow by tricking a user or application using libvncserver to connect to an unstrusted server and subsequently sending cursor shapes with specially crafted dimensions.

Comment 1 Michael Kaplan 2020-03-10 09:54:33 UTC
Created libvncserver tracking bugs for this issue:

Affects: epel-7 [bug 1811951]
Affects: fedora-all [bug 1811950]

Comment 2 Michael Kaplan 2020-03-10 09:55:51 UTC
Researcher Reference:

https://www.openwall.com/lists/oss-security/2019/12/20/2

Comment 12 errata-xmlrpc 2020-03-23 08:32:22 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:0921 https://access.redhat.com/errata/RHSA-2020:0921

Comment 13 errata-xmlrpc 2020-03-23 08:43:01 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:0913 https://access.redhat.com/errata/RHSA-2020:0913

Comment 14 errata-xmlrpc 2020-03-23 08:46:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:0920 https://access.redhat.com/errata/RHSA-2020:0920

Comment 15 Product Security DevOps Team 2020-03-23 10:32:26 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-2019-15690

Comment 17 Stefan Cornelius 2020-05-12 13:49:41 UTC
*** Bug 1829870 has been marked as a duplicate of this bug. ***

Comment 18 Eric Christensen 2020-07-08 18:20:45 UTC
Mitigation:

Libvncserver should not be used to connect to untrusted server.


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