CVE-2021-24031

Public Exploit

Description

In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions. Correct file permissions (matching the input) would only be set at completion time. Output files could therefore be readable or writable to unintended parties.

Categories

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.02%
Vendor Advisory facebook.com
Affected: Facebook Zstandard
Published at:
Updated at:

References

Link Tags
https://github.com/facebook/zstd/issues/1630 issue tracking exploit third party advisory
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=981404 issue tracking mailing list exploit third party advisory
https://www.facebook.com/security/advisories/cve-2021-24031 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-24031?
CVE-2021-24031 has been scored as a medium severity vulnerability.
How to fix CVE-2021-24031?
To fix CVE-2021-24031, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-24031 being actively exploited in the wild?
It is possible that CVE-2021-24031 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-24031?
CVE-2021-24031 affects Facebook Zstandard.
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