Medium severity · published Mar 4, 2021
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…
4.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZS
Zstandard · Facebook
1.4.1 before unspecified · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-24032
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-24032
Patch
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519
Issue Tracking
https://github.com/facebook/zstd/issues/2491
Third Party Advisory
https://www.facebook.com/security/advisories/cve-2021-24032
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CVE-2021-24031
In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions