CVE-2019-8642 Security feature bypass in macOS

Low 3.3 Published 27 Oct 2020 Updated 4 Aug 2024

Attackers can spoof S/MIME signatures by sending maliciously crafted mail messages, bypassing email security features in macOS.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2019-8642?

CVE-2019-8642 is a low-severity vulnerability in Apple Mac Os X, published on 27 Oct 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

An issue existed in the handling of S-MIME certificates. This issue was addressed with improved validation of S-MIME certificates. This issue is fixed in macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra. Processing a maliciously crafted mail message may lead to S/MIME signature spoofing.

Weakness: CWE-295

Which versions are affected by CVE-2019-8642?

It affects 1 product.

Products include Apple Mac Os X.

How do I fix CVE-2019-8642?

No fix has been published for CVE-2019-8642 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-8642 being exploited?

There is no known exploitation of CVE-2019-8642 in the wild and no public exploit code.

All Apple Mac Os X vulnerabilities

Sources

Also known as GHSA-mgj4-gg2g-j7vw.