Buffer overflow in macOS - CVE-2021-30737

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Main Vulnerability Database Vulnerabilities #VU53487

Buffer overflow in macOS - CVE-2021-30737

Published: May 24, 2021 / Updated: June 14, 2021


Vulnerability identifier: #VU53487
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-30737
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the ASN.1 decoder when processing TLS certificates. A remote attacker can trick the victim to visit a specially crafted website, trigger memory corruption with a specially crafted TLS certificate and execute arbitrary code on the system.


Affected software

macOS
watchOS
Apple iOS
iPadOS
tvOS

How to mitigate CVE-2021-30737

Install updates from vendor's website.

macOS - addressed in versions 11.4 20F71, 10.14.6 18G9216, 10.15.7 19H1217
watchOS - update to 7.5 18T567
Apple iOS - addressed in versions 12.5.4 16H50, 14.6 18F72
iPadOS - update to 14.6 18F72
tvOS - update to 14.6 18L569

External References

Related Security Bulletins