CVE-2023-20197

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-08-16 · updated 2026-06-17
Weakness: CWE-835

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 .

Affected products

Cisco Secure Endpoint: before 1.22.0; before 7.5.13.21586; from 8.0.1.21160 before 8.1.7.21585 — fixed in 1.22.0, 7.5.13.21586, 8.1.7.21585
Cisco Secure Endpoint Private Cloud: before 3.8.0 — fixed in 3.8.0
Fedoraproject Fedora: 38

How to fix

Upgrade to a fixed version: Cisco Secure Endpoint 1.22.0, 7.5.13.21586, 8.1.7.21585; Cisco Secure Endpoint Private Cloud 3.8.0. Check the vendor advisory for mitigations.

References

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