#VU65621 Out-of-bounds write in macOS - CVE-2022-32792

Vulnerability identifier: #VU65621

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-2022-32792

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
macOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the B3 JIT compiler in WebKit. A remote attacker can trick the victim into opening a specially crafted webpage, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

macOS: 12.0 21A344 - 12.4 21F79

---

External links
https://support.apple.com/en-us/HT213345
https://bugs.webkit.org/show_bug.cgi?id=240720
https://www.zerodayinitiative.com/advisories/ZDI-22-1123/

---

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.