Multiple vulnerabilities in WebKitGTK and WPE WebKit

Published: 2021-12-20

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-30809 CVE-2021-30836
CWE-ID	CWE-416 CWE-125
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	WPE WebKit Server applications / Frameworks for developing and running applications WebKitGTK+ Server applications / Frameworks for developing and running applications
Vendor	WebKitGTK

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU58701

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-30809

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing HTML content in WebKit. A remote attacker can trick the victim to visit a specially crafted website, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WPE WebKit: 2.32.0 - 2.32.3

WebKitGTK+: 2.32.0 - 2.32.3

CPE2.3

External links

https://webkitgtk.org/security/WSA-2021-0007.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds read

EUVDB-ID: #VU58699

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-30836

CWE-ID: CWE-125 - Out-of-bounds read