Privilege escalation in Apple macOS Big Sur

1) Out-of-bounds write

EUVDB-ID: #VU74605

Risk: High

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2023-28206

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: Yes

Description

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to a boundary error in IOSurfaceAccelerator. A local application can trigger an out-of-bounds write and execute arbitrary code with kernel privileges.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

macOS: 11.0 20A2411 - 11.7.5 20G1225

CPE2.3

• cpe:2.3:o:apple:macos:11.0:20A2411:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.0.1:20B29:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.0.1:20B50:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.1:20C69:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.2:20D64:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.2.1:20D74:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.2.1:20D75:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.2.2:20D80:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.2.3:20D91:*:*:*:*:*:*
• cpe:2.3:o:apple:macos:11.3:20E232:*:*:*:*:*:*

External links

https://support.apple.com/en-us/HT213725

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.