Is CVE-2021-40393 in the CISA KEV catalog?

No. CVE-2021-40393 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-40393?

CVE-2021-40393 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-40393?

CVE-2021-40393 has an EPSS score of 3.06% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-40393?

Upgrade gerbv on debian 11 to 2.7.0-2+deb11u2 or later.

CVE & CISA-KEV Catalog

CVE-2021-40393

CRITICALEPSS 86th pctl

9.8

CVSS v3

NVD

Description

An out-of-bounds write vulnerability exists in the RS-274X aperture macro variables handling functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and the forked version of Gerbv (commit 71493260). A specially-crafted gerber file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

CWE-119Buffer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

gerbvDebian

Fixed in:2.7.0-2+deb11u2CVE-2021-40393

Fixed in:2.8.2-1CVE-2021-40393

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.06%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Exploit1

talosintelligence.com

Third-Party Advisory1

debian.org

Other references2

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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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.