CVE-2021-21779

webkitgtk: Use-after-free in WebCore::GraphicsContext leading to information leak and possibly code execution

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. 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.

Se presenta una vulnerabilidad de uso de memoria previamente liberada en la forma en que el GraphicsContext de Webkit maneja determinados eventos en WebKitGTK versión 2.30.4. Una página web especialmente diseñada puede conllevar a un potencial filtrado de información y una mayor corrupción de memoria. Una víctima debe ser engañada para visitar una página web maliciosa para desencadenar esta vulnerabilidad

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-04 CVE Reserved
2021-05-26 CVE Published
2024-03-23 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free

CAPEC

References (7)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2021/07/23/1	Mailing List

URL	Date	SRC
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1238	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYMMBQN4PRVDLMIJT2LY2BWHLYBD57P3	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6	2023-11-07
https://www.debian.org/security/2021/dsa-4945	2023-11-07
https://access.redhat.com/security/cve/CVE-2021-21779	2021-11-09
https://bugzilla.redhat.com/show_bug.cgi?id=1986866	2021-11-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Webkitgtk Search vendor "Webkitgtk"		Webkitgtk Search vendor "Webkitgtk" for product "Webkitgtk"				2.30.4 Search vendor "Webkitgtk" for product "Webkitgtk" and version "2.30.4"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected