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Vulnerability · Published Apr 8, 2021 · Assigned by cisco

CVE-2021-1405Clam AntiVirus (ClamAV) PDF Parser Denial of Service Vulnerability

High 7.5

In plain English

A high-severity buffer overflow in ClamAV from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.0% (higher than 88% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)3.0%top 12.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A vulnerability in the email parsing module in Clam AntiVirus (ClamAV) Software version 0.103.1 and all prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper variable initialization that may result in an NULL pointer read. An attacker could exploit this vulnerability by sending a crafted email to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20clamav0.103.2-r0ALPINE-CVE-2021-1405
Alpine:v3.21clamav0.103.2-r0ALPINE-CVE-2021-1405
Alpine:v3.22clamav0.103.2-r0ALPINE-CVE-2021-1405
Alpine:v3.23clamav0.103.2-r0ALPINE-CVE-2021-1405
Alpine:v3.24clamav0.103.2-r0ALPINE-CVE-2021-1405
Debian:12clamav0.103.2+dfsg-1DEBIAN-CVE-2021-1405
Debian:13clamav0.103.2+dfsg-1DEBIAN-CVE-2021-1405
Debian:14clamav0.103.2+dfsg-1DEBIAN-CVE-2021-1405

Affected products (as reported)

VendorProductVersions
Cisco ClamAV unspecified – through 0.103.1

Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References