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CVE-2021-1252

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

Published: Apr 8, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-20
NVD MITRE
7.5CVSSHIGH
EPSS Score
2.6%
Top 16.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-20CWE-835

Affected Products

clamavclamav
On-premSecurity Product
Security Products / vuln-mgmt-scanner
ClamAVCiscoSecurity Products / vuln-mgmt-scanner
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
SUSE Linux Enterprise Server for SAP ApplicationsNovell Inc.
On-premOS
Operating Systems / linux-distro
clamavoss-projectSecurity Productsaka clambc, clamav
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
canonical ltd.commercialGBOperating Systemsaka canonical
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
novell inc.commercialUSOperating Systems
and 15 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Impact
Initial Access
View detailed technique mapping

References

https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html
blog.clamav.net
https://altsp.su/obnovleniya-bezopasnosti/
altsp.su
https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html
blog.clamav.net
and 5 more references View all →

Timeline

Published
Apr 8, 2021
Last Updated
Nov 21, 2024

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