Bug 1986866 (CVE-2021-21779) - CVE-2021-21779 webkitgtk: Use-after-free in WebCore::GraphicsContext leading to information leak and possibly code execution
Summary: CVE-2021-21779 webkitgtk: Use-after-free in WebCore::GraphicsContext leading ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-21779
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: 1986867 1999828
Blocks: 1986910
TreeView+ depends on / blocked
 
Reported: 2021-07-28 13:34 UTC by Michael Kaplan
Modified: 2021-11-10 00:52 UTC (History)
4 users (show)

Fixed In Version: webkitgtk 2.32.3
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Clone Of:
Environment:
Last Closed: 2021-11-10 00:52:50 UTC


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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4381 0 None None None 2021-11-09 18:31:39 UTC

Description Michael Kaplan 2021-07-28 13:34:02 UTC
A use-after-free vulnerability exists in the way that WebKit GraphicsContext handles certain events. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.

Comment 1 Michael Kaplan 2021-07-28 13:34:47 UTC
Created webkit2gtk3 tracking bugs for this issue:

Affects: fedora-all [bug 1986867]

Comment 2 Tomas Hoger 2021-08-30 14:47:14 UTC
Upstream advisory:

https://webkitgtk.org/security/WSA-2021-0004.html

Comment 3 Tomas Hoger 2021-08-31 15:49:43 UTC
Talos advisory with more details:

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1238

Comment 5 errata-xmlrpc 2021-11-09 18:31:37 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4381 https://access.redhat.com/errata/RHSA-2021:4381

Comment 6 Product Security DevOps Team 2021-11-10 00:52:48 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-2021-21779


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