Vulnerability identifier: #VU53404

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30745

CWE-ID: CWE-843

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
macOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

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

The vulnerability exists due to a type confusion error within the QuartzCore Framework. A local user can run a specially crafted program to trigger a type confusion error and execute arbitrary code on the system in the context of WindowServer.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

macOS: 10.15 19A583 - 10.15.7 19H524

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External links
http://www.zerodayinitiative.com/advisories/ZDI-21-597/

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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?

No. We are not aware of malware exploiting this vulnerability.