#VU83605 Out-of-bounds read in WebKitGTK+ and WPE WebKit - CVE-2023-42916

Vulnerability identifier: #VU83605

Vulnerability 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-2023-42916

CWE-ID: CWE-125

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 compromise vulnerable system.

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

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

Mitigation
Install update from vendor's website.

Vulnerable software versions

WebKitGTK+: before 2.42.3

WPE WebKit: before 2.42.3

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External links
https://support.apple.com/en-us/HT214033
https://support.apple.com/en-us/HT214032
https://support.apple.com/en-us/HT214031
https://wpewebkit.org/security/WSA-2023-0011.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?

Yes. This vulnerability is being exploited in the wild.