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.
References (1)
Core 1
Core References
Release Notes, Vendor Advisory vendor-advisory
x_refsource_cisco
https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html
Scores
CVSS v3
7.5
EPSS
0.0054
EPSS Percentile
67.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-20
CWE-835
Status
published
Products (2)
clamav/clamav
0.103.0
clamav/clamav
0.103.1
Published
Apr 08, 2021
Tracked Since
Feb 18, 2026