CVE-2020-3855 Path traversal in macOS

What is CVE-2020-3855?

CVE-2020-3855 is a high-severity path traversal 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 access issue was addressed with improved access restrictions. This issue is fixed in macOS Catalina 10.15.3, Security Update 2020-001 Mojave, Security Update 2020-001 High Sierra. A malicious application may be able to overwrite arbitrary files.

Which versions are affected by CVE-2020-3855?

It affects 1 product.

Products include Apple Mac Os X.

How do I fix CVE-2020-3855?

No fix has been published for CVE-2020-3855 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-3855 being exploited?

There is no known exploitation of CVE-2020-3855 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-q83q-2xrr-g3r8.