#VU46804 Out-of-bounds write in WPE WebKit and WebKitGTK+ - CVE-2020-9983

Vulnerability identifier: #VU46804

Vulnerability 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-2020-9983

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

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

Vendor: WebKitGTK

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in WebKit component in Apple Safari. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WPE WebKit: 2.19.93 - 2.30.2

WebKitGTK+: 2.0.0 - 2.30.2

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External links
https://support.apple.com/en-us/HT211845
https://webkitgtk.org/security/WSA-2020-0008.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.