Bug 1980441 (CVE-2021-21806)

Summary:	CVE-2021-21806 webkitgtk: Use-after-free in fireEventListeners leading to arbitrary code execution
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	erack, gnome-sig, mcatanza, tpopela
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	webkitgtk 2.30.6	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-10 00:24:46 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:	1999678
Bug Blocks:	1986910

Description Michael Kaplan 2021-07-08 16:38:38 UTC

An exploitable use-after-free vulnerability exists in WebKitGTK browser version 2.30.3 x64. A specially crafted HTML web page can cause a use-after-free condition, resulting in remote code execution. The victim needs to visit a malicious web site to trigger the vulnerability.

Comment 4 Tomas Hoger 2021-08-30 14:47:20 UTC

Upstream advisory:

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

Comment 5 Tomas Hoger 2021-08-31 14:34:41 UTC

Talos advisory with more details:

https://talosintelligence.com/vulnerability_reports/TALOS-2020-1214

Comment 7 errata-xmlrpc 2021-11-09 18:31:28 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 8 Product Security DevOps Team 2021-11-10 00:24:45 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-2021-21806