Vulnerability in Facebook Zstandard
CVE-2021-24032
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.
EPSS: 0.003 (27.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Facebook Zstandard — versions 1.4.9, 1.4.1, unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve-assign@fb.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve-assign@fb.com (Patch, Third Party Advisory, x_refsource_MISC)
- cve-assign@fb.com (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-24032?
- CVE-2021-24032 is a medium-severity vulnerability in Facebook Zstandard, classified under Insecure Inherited Permissions. CVSS score: 4.7/10. Published 2021-03-04.
- How severe is CVE-2021-24032?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2021-24032 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.