Is CVE-2021-3781 in the CISA KEV catalog?

No. CVE-2021-3781 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3781?

CVE-2021-3781 has a CVSS v3 base score of 9.9 (CRITICAL).

What is the EPSS score for CVE-2021-3781?

CVE-2021-3781 has an EPSS score of 83.91% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3781?

Upgrade ghostscript on debian 11 to 9.53.3~dfsg-7+deb11u1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3781

CRITICALEPSS 100th pctl

9.9

CVSS v3

NVD

Description

A trivial sandbox (enabled with the `-dSAFER` option) escape flaw was found in the ghostscript interpreter by injecting a specially crafted pipe command. This flaw allows a specially crafted document to execute arbitrary commands on the system in the context of the ghostscript interpreter. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

CWE-20Improper Input Validation CWE-78OS Command Injection

How to fix

Remediation Available

ghostscriptDebian

Fixed in:9.53.3~dfsg-7+deb11u1CVE-2021-3781

Fixed in:9.53.3~dfsg-8CVE-2021-3781

ghostscriptUbuntu

Fixed in:9.50~dfsg-5ubuntu4.3USN-5075-1

libgs9Ubuntu

Fixed in:9.50~dfsg-5ubuntu4.3USN-5075-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

83.91%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Patch2

Third-Party Advisory1

security.gentoo.org

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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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.