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Fencer Vulns
high 7.5

CVE-2023-20197 json

A vulnerability in the filesystem image parser for Hierarchical File System Plus (HFS+) of ClamAV could allow an unauthenticated, remote at…

published 2023-08-16 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-24376

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

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 .

Patch / fix

  • cisco secure_endpoint 1.22.0, 7.5.13.21586, 8.1.7.21585
  • cisco secure_endpoint_private_cloud 3.8.0
  • clamav Debian 12 1.0.2+dfsg-1~deb12u1
  • clamav Debian 14, Debian 13 1.0.2+dfsg-1

debian advisories DEBIAN-CVE-2023-20197

  • clamav Ubuntu 20.04 LTS 0.103.9+dfsg-0ubuntu0.20.04.1
  • clamav Ubuntu 22.04 LTS 0.103.9+dfsg-0ubuntu0.22.04.1
  • clamav Ubuntu Pro 14.04 LTS 0.103.9+dfsg-0ubuntu0.14.04.1+esm1
  • clamav Ubuntu Pro 16.04 LTS 0.103.9+dfsg-0ubuntu0.16.04.1+esm1
  • clamav Ubuntu Pro 18.04 LTS 0.103.9+dfsg-0ubuntu0.18.04.1+esm1

ubuntu advisories UBUNTU-CVE-2023-20197

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • clamav SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 1.4.2-150600.18.6.1
  • clamav SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +12 more 1.4.2-150200.8.3.1
  • clamav SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES for SAP 15 SP1 +15 more 0.103.9-150000.3.47.1
  • clamav SLES for SAP 12 SP5, SLES 12 SP5 0.103.9-3.27.1
  • clamav SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.4.2-3.36.1

suse advisories SUSE-SU-2025:0328-1SUSE-SU-2025:0327-1SUSE-SU-2025:0325-1SUSE-SU-2023:3456-1SUSE-SU-2023:3435-1

  • clamav openSUSE Tumbleweed 0.103.9-1.1

opensuse advisories openSUSE-SU-2024:13174-1

  • clamav Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 1.1.1-r0

alpine advisories ALPINE-CVE-2023-20197

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-20197 updated

fedora: ClamAV File Scanning Infinite Loop Denial of Service Vulnerability

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Cisco Cisco Secure Endpoint
  • Cisco Cisco Secure Endpoint Private Cloud Console

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.