Privilege escalation in Apple macOS Catalina



Published: 2021-09-23 | Updated: 2021-09-24
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-30869
CWE-ID CWE-843
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
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macOS
Operating systems & Components / Operating system

Vendor Apple Inc.

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Type Confusion

EUVDB-ID: #VU56845

Risk: High

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

CVE-ID: CVE-2021-30869

CWE-ID: CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Exploit availability: No

Description

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

The vulnerability exists due to a type confusion error within the XNU subsystem. A local user can run a specially crafted program to trigger a type confusion error and execute arbitrary code with elevated privileges.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

macOS: 10.15 19A583, 10.15 19A602, 10.15 19A603, 10.15.1 19B88, 10.15.2 19C57, 10.15.3 19D76, 10.15.4 19E266, 10.15.4 19E287, 10.15.5 19F96, 10.15.5 19F101, 10.15.6 19G73, 10.15.6 19G2021, 10.15.7 19H2, 10.15.7 19H4, 10.15.7 19H15, 10.15.7 19H114, 10.15.7 19H512, 10.15.7 19H524, 10.15.7 19H1030, 10.15.7 19H1217, 10.15.7 19H1323, 10.15.7 19H1417

CPE2.3 External links

http://support.apple.com/en-us/HT212825

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.



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