Vulnerability Details : 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.
Products affected by CVE-2021-24032
- cpe:2.3:a:facebook:zstandard:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-24032
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 14 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-24032
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
1.9
|
LOW | AV:L/AC:M/Au:N/C:P/I:N/A:N |
3.4
|
2.9
|
NIST | |
|
4.7
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.0
|
3.6
|
NIST |
CWE ids for CVE-2021-24032
-
During installation, installed file permissions are set to allow anyone to modify those files.Assigned by: nvd@nist.gov (Primary)
-
A product defines a set of insecure permissions that are inherited by objects that are created by the program.Assigned by: cve-assign@fb.com (Secondary)
References for CVE-2021-24032
-
https://www.facebook.com/security/advisories/cve-2021-24032
FacebookThird Party Advisory
-
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519
#982519 - zstd: Race condition allows attacker to access world-readable destination file - Debian Bug report logsPatch;Third Party Advisory
-
https://github.com/facebook/zstd/issues/2491
Race condition allows attacker to access world-readable destination file · Issue #2491 · facebook/zstd · GitHubIssue Tracking;Patch;Third Party Advisory
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