clamav clamav CVE-2021-1252 vulnerability in Clamav and Other Products
Published on April 8, 2021

Clam AntiVirus (ClamAV) Excel XLM Parser Denial of Service Vulnerability

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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.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2021-1252 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.


Products Associated with CVE-2021-1252

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-1252 are published in these products:

Clamav
 
Canonical Ubuntu Linux
 
Cisco Clamav
 

Affected Versions

Cisco ClamAV:

Exploit Probability

EPSS
0.54%
Percentile
67.22%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.