CVE-2023-20197

Publication date 17 August 2023

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

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 .

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
clamav	23.04 lunar	Fixed 0.103.9+dfsg-0ubuntu0.23.04.1
	22.04 LTS jammy	Fixed 0.103.9+dfsg-0ubuntu0.22.04.1
	20.04 LTS focal	Fixed 0.103.9+dfsg-0ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 0.103.9+dfsg-0ubuntu0.18.04.1+esm1
	16.04 LTS xenial	Fixed 0.103.9+dfsg-0ubuntu0.16.04.1+esm1
	14.04 LTS trusty	Fixed 0.103.9+dfsg-0ubuntu0.14.04.1+esm1

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Notes

mdeslaur

per upstream: "This issue affects versions 1.1.0, 1.0.1 through 1.0.0, 0.105.2 through 0.105.0, 0.104.4 through 0.104.0, and 0.103.8 through 0.103.0."

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H