CVE-2021-1405 HIGH

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

Vendor Cisco
Product ClamAV
Weakness CWE-120
Published April 8, 2021
Last update November 8, 2024

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 8, 2021 CVE published
November 8, 2024 Record updated