#VU26446 Business Logic Errors in watchOS - CVE-2020-3891

Vulnerability identifier: #VU26446

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-3891

CWE-ID: CWE-840

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
watchOS
Operating systems & Components / Operating system

Vendor: Apple Inc.

Description

The vulnerability allows a local attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to logical errors. A an attacker with physical access to a locked iOS device may be able to respond to messages even when replies are disabled.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

watchOS: 6.0 - 6.1.3

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External links
https://seclists.org/fulldisclosure/2020/Mar/33
https://support.apple.com/en-il/HT211103

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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