CVE-2021-24032 Information disclosure in Zstandard
The Zstandard command-line utility temporarily exposed output files with default permissions, allowing local attackers to read or modify them before restrictions were applied.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-24032?
CVE-2021-24032 is a medium-severity vulnerability in Facebook Zstandard, published on 4 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.
Which versions are affected by CVE-2021-24032?
It affects 1 product.
Products include Facebook Zstandard.
How do I fix CVE-2021-24032?
Upgrade to a fixed version.
Is CVE-2021-24032 being exploited?
There is no known exploitation of CVE-2021-24032 in the wild and no public exploit code.
Other vulnerabilities in Facebook Zstandard
Sources
Also known as ALPINE-CVE-2021-24032, AZL-38944, AZL-39352, CLEANSTART-2025-AN69250, DEBIAN-CVE-2021-24032, DSA-4859-1 and 5 more.