Is CVE-2021-3478 in the CISA KEV catalog?

No. CVE-2021-3478 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3478?

CVE-2021-3478 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-3478?

CVE-2021-3478 has an EPSS score of 0.96% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3478?

Upgrade openexr on debian 11 to 2.5.4-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3478

MEDIUM

5.5

CVSS v3

NVD

Description

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

CWE-400Resource Exhaustion CWE-770Allocation of Resources Without Limits or Throttling

How to fix

Remediation Available

openexrDebian

Fixed in:2.5.4-1CVE-2021-3478

libopenexr22Ubuntu

Fixed in:2.2.0-10ubuntu2.6USN-4900-1

Fixed in:2.2.0-11.1ubuntu1.6USN-4900-1

libopenexr24Ubuntu

Fixed in:2.3.0-6ubuntu0.5USN-4900-1

openexrUbuntu

Fixed in:2.2.0-10ubuntu2.6USN-4900-1

Fixed in:2.2.0-11.1ubuntu1.6USN-4900-1

Fixed in:2.3.0-6ubuntu0.5USN-4900-1

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 RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.96%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Third-Party Advisory4

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	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.