CVE-2023-20197

Ubuntu Security Notice USN-6303-1

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 filesystem image parser for Hierarchical File System Plus (HFS+) of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an incorrect check for completion when a file is decompressed, which may result in a loop condition that could cause the affected software to stop responding. An attacker could exploit this vulnerability by submitting a crafted HFS+ filesystem image to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to stop responding, resulting in a DoS condition on the affected software and consuming available system resources. For a description of this vulnerability, see the ClamAV blog .

USN-6303-1 fixed a vulnerability in ClamAV. This update provides the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS. It was discovered that ClamAV incorrectly handled parsing HFS+ files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service.

*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

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-10-27 CVE Reserved
2023-08-16 CVE Published
2024-08-02 CVE Updated
2025-05-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-rNwNEEee	2024-01-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Secure Endpoint Search vendor "Cisco" for product "Secure Endpoint"				< 1.22.0 Search vendor "Cisco" for product "Secure Endpoint" and version " < 1.22.0"		linux		Affected
Cisco Search vendor "Cisco"		Secure Endpoint Search vendor "Cisco" for product "Secure Endpoint"				< 1.22.0 Search vendor "Cisco" for product "Secure Endpoint" and version " < 1.22.0"		macos		Affected
Cisco Search vendor "Cisco"		Secure Endpoint Search vendor "Cisco" for product "Secure Endpoint"				< 7.5.13.21586 Search vendor "Cisco" for product "Secure Endpoint" and version " < 7.5.13.21586"		windows		Affected
Cisco Search vendor "Cisco"		Secure Endpoint Search vendor "Cisco" for product "Secure Endpoint"				>= 8.0.1.21160 < 8.1.7.21585 Search vendor "Cisco" for product "Secure Endpoint" and version " >= 8.0.1.21160 < 8.1.7.21585"		windows		Affected
Cisco Search vendor "Cisco"		Secure Endpoint Private Cloud Search vendor "Cisco" for product "Secure Endpoint Private Cloud"				< 3.8.0 Search vendor "Cisco" for product "Secure Endpoint Private Cloud" and version " < 3.8.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				38 Search vendor "Fedoraproject" for product "Fedora" and version "38"		-		Affected