Is CVE-2021-1252 in the CISA KEV catalog?

No. CVE-2021-1252 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-1252?

CVE-2021-1252 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-1252?

CVE-2021-1252 has an EPSS score of 2.62% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-1252?

Upgrade clamav on debian 11 to 0.103.2+dfsg-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-1252

HIGHEPSS 84th pctl

7.5

CVSS v3

NVD

Description

A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper error handling that may result in an infinite loop. An attacker could exploit this vulnerability by sending a crafted Excel file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process hang, resulting in a denial of service condition.

CWE-20Improper Input Validation CWE-835

How to fix

Remediation Available

clamavDebian

Fixed in:0.103.2+dfsg-1CVE-2021-1252

clamavUbuntu

Fixed in:0.103.2+dfsg-0ubuntu0.14.04.1+esm1USN-4918-2

Fixed in:0.103.2+dfsg-0ubuntu0.16.04.1USN-4918-1

Fixed in:0.103.2+dfsg-0ubuntu0.18.04.1USN-4918-1

Fixed in:0.103.2+dfsg-0ubuntu0.20.04.1USN-4918-1

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.62%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Vendor Advisory1

blog.clamav.net

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.