Ubuntu update for webkit2gtk

1) Type Confusion

EUVDB-ID: #VU72161

Risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-23529

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a type confusion error when parsing web content in WebKit. A remote attacker can trick the victim to visit a specially crafted website, trigger a type confusion error and execute arbitrary code on the target system.

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

Mitigation

Update the affected package webkit2gtk to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.10

libjavascriptcoregtk-4.0-18 (Ubuntu package): before 2.38.5-0ubuntu0.22.10.1

libjavascriptcoregtk-5.0-0 (Ubuntu package): before 2.38.5-0ubuntu0.22.10.1

libwebkit2gtk-4.1-0 (Ubuntu package): before 2.38.5-0ubuntu0.22.10.1

libwebkit2gtk-4.0-37 (Ubuntu package): before 2.38.5-0ubuntu0.22.10.1

libjavascriptcoregtk-4.1-0 (Ubuntu package): before 2.38.5-0ubuntu0.22.10.1

libwebkit2gtk-5.0-0 (Ubuntu package): before 2.38.5-0ubuntu0.22.10.1

External links

http://ubuntu.com/security/notices/USN-5893-1

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.