CVE-2020-9921 Memory corruption in macOS

What is CVE-2020-9921?

CVE-2020-9921 is a high-severity memory corruption vulnerability in Apple Mac Os X, published on 22 Oct 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Catalina 10.15.6. A malicious application may be able to execute arbitrary code with system privileges.

Weakness: CWE-787, CWE-367

Which versions are affected by CVE-2020-9921?

It affects 1 product.

Products include Apple Mac Os X.

How do I fix CVE-2020-9921?

No fix has been published for CVE-2020-9921 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-9921 being exploited?

There is no known exploitation of CVE-2020-9921 in the wild and no public exploit code.

Other vulnerabilities in Apple Mac Os X

• CVE-2014-7169 GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited Critical 9.8
• CVE-2014-6271 GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited Critical 9.8
• CVE-2012-1823 PHP-CGI Query String Parameter Exploited Critical 9.8
• CVE-2021-30713 Apple macOS Unspecified Exploited High 7.8
• CVE-2019-8526 Apple macOS Use-After-Free Exploited High 7.8

All Apple Mac Os X vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-845m-9j3r-jhfg.