CVE-2020-9855 Privilege escalation in macOS

What is CVE-2020-9855?

CVE-2020-9855 is a high-severity vulnerability in Apple Mac Os X, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. This issue is fixed in macOS Catalina 10.15.5. A local attacker may be able to elevate their privileges.

Weakness: CWE-20

Which versions are affected by CVE-2020-9855?

It affects 1 product.

Products include Apple Mac Os X.

How do I fix CVE-2020-9855?

No fix has been published for CVE-2020-9855 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-9855 being exploited?

There is no known exploitation of CVE-2020-9855 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-326p-6v47-q438.