Is CVE-2021-24031 in the CISA KEV catalog?

No. CVE-2021-24031 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-24031?

CVE-2021-24031 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-24031?

CVE-2021-24031 has an EPSS score of 0.43% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-24031?

Upgrade libzstd on debian 11 to 1.4.8+dfsg-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-24031

MEDIUM

5.5

CVSS v3

NVD

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.

CWE-277 CWE-276

How to fix

Remediation Available

libzstdDebian

Fixed in:1.4.8+dfsg-1CVE-2021-24031

libzstdUbuntu

Fixed in:1.3.1+dfsg-1~ubuntu0.16.04.1+esm3USN-5720-1

Fixed in:1.3.3+dfsg-2ubuntu1.2USN-4760-1

Fixed in:1.4.4+dfsg-3ubuntu0.1USN-4760-1

libzstd1Ubuntu

Fixed in:1.3.1+dfsg-1~ubuntu0.16.04.1+esm3USN-5720-1

Fixed in:1.3.3+dfsg-2ubuntu1.2USN-4760-1

Fixed in:1.4.4+dfsg-3ubuntu0.1USN-4760-1

zstdUbuntu

Fixed in:1.3.1+dfsg-1~ubuntu0.16.04.1+esm3USN-5720-1

Fixed in:1.3.3+dfsg-2ubuntu1.2USN-4760-1

Fixed in:1.4.4+dfsg-3ubuntu0.1USN-4760-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.43%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Exploit2

Vendor Advisory1

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.