#VU59918 Buffer overflow in WebKitGTK+ and WPE WebKit - CVE-2021-45481

Vulnerability identifier: #VU59918

Vulnerability risk: Medium

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

CVE-ID: CVE-2021-45481

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WebKitGTK+
Server applications / Frameworks for developing and running applications
WPE WebKit
Server applications / Frameworks for developing and running applications

Vendor: WebKitGTK

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in WebCore::ImageBufferCairoImageSurfaceBackend::create. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WebKitGTK+: 2.32.0 - 2.33.90

WPE WebKit: 2.32.0 - 2.33.90

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External links
https://github.com/ChijinZ/security_advisories/tree/master/webkitgtk-2.32.3
https://www.openwall.com/lists/oss-security/2022/01/21/2
https://webkitgtk.org/security/WSA-2022-0001.html

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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.