Remote code execution in WebKitGTK and WPE WebKit

1) Use-after-free

EUVDB-ID: #VU56475

Risk: Critical

CVSSv4.0: 8.6 [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:A/U:Red]

CVE-ID: CVE-2021-30858

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

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 web page, 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.

Note, the vulnerability is being actively exploited in-the-wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WPE WebKit: 2.32.0 - 2.33.90

WebKitGTK+: 2.32.0 - 2.33.90

CPE2.3

• cpe:2.3:a:webkitgtk:wpe_webkit:2.32.0:*:*:*:*:*:*:*
• cpe:2.3:a:webkitgtk:wpe_webkit:2.32.1:*:*:*:*:*:*:*
• cpe:2.3:a:webkitgtk:wpe_webkit:2.32.2:*:*:*:*:*:*:*
• cpe:2.3:a:webkitgtk:webkitgtk_plus:2.32.0:*:*:*:*:*:*:*
• cpe:2.3:a:webkitgtk:webkitgtk_plus:2.32.1:*:*:*:*:*:*:*
• cpe:2.3:a:webkitgtk:webkitgtk_plus:2.32.2:*:*:*:*:*:*:*

External links

http://webkitgtk.org/security/WSA-2021-0005.html
http://webkitgtk.org/security/WSA-2021-0006.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?

Yes. This vulnerability is being exploited in the wild.