CVE-2021-1405

Clam AntiVirus (ClamAV) PDF Parser Denial of Service Vulnerability

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Una vulnerabilidad en el módulo de análisis de correo electrónico del software Clam AntiVirus (ClamAV) versión 0.103.1 y todas las versiones anteriores podría permitir a un atacante remoto no autenticado provocar una condición de denegación de servicio en un dispositivo afectado. La vulnerabilidad se debe a una inicialización incorrecta de las variables que puede dar lugar a la lectura de un puntero NULL. Un atacante podría explotar esta vulnerabilidad enviando un correo electrónico manipulado a un dispositivo afectado. Una explotación podría permitir al atacante causar la caída del proceso de escaneo de ClamaV, resultando en una condición de denegación de servicio

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-04-07 CVE Published
2023-12-23 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-909: Missing Initialization of Resource

CAPEC

References (3)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2021/04/msg00012.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html	2022-08-05
https://security.gentoo.org/glsa/202104-07	2022-08-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Clamav Search vendor "Clamav"		Clamav Search vendor "Clamav" for product "Clamav"				<= 0.103.1 Search vendor "Clamav" for product "Clamav" and version " <= 0.103.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected