#VU72154 Out-of-bounds read in macOS - CVE-2021-31002

Vulnerability identifier: #VU72154

Vulnerability risk: Low

CVSSv4.0: 5.9 [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:U/U:Clear]

CVE-ID: CVE-2021-31002

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
macOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

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

The vulnerability exists due to a boundary condition in SMB implementation. A local application can trigger an out-of-bounds read error and execute arbitrary code with system privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

macOS: 12.0 21A344

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External links
https://support.apple.com/en-us/HT212869

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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.