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🛡️ CVE-2023-20032 — clamav

🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-120 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

On Feb 15, 2023, the following vulnerability in the ClamAV scanning library was disclosed:

A vulnerability in the HFS+ partition file parser of ClamAV versions 1.0.0 and earlier, 0.105.1 and earlier, and 0.103.7 and earlier could allow an unauthenticated, remote attacker to execute arbitrary code.

This vulnerability is due to a missing buffer size check that may result in a heap buffer overflow write. An attacker could exploit this vulnerability by submitting a crafted HFS+ partition file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the ClamAV scanning process, or else crash the process, resulting in a denial of service (DoS) condition.

For a description of this vulnerability, see the ClamAV blog ["https://blog.clamav.net/"].

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2023-20032 is classified as CWE-120: Classic Buffer Overflow. Input is copied into a fixed-size buffer without a length check, overwriting memory past the end of it.

Affected software

CVE-2023-20032 is recorded against 5 packages.

  • clamav
  • secure-endpoint (from 8.0.1.21160 up to 8.1.5)
  • secure-endpoint-private-cloud (fixed in 3.6.0)
  • stormshield-network-security (from 4.4.0 up to 4.6.4)
  • web-security-appliance (from 15.0.0 up to 15.0.0-254)

Timeline and source

Published on 1 March 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

sec.cloudapps.cisco.com
sec.cloudapps.cisco.com

Other advisories for this package

clamav has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-120: Classic Buffer Overflow) in other software:

CVE-2023-20032 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-120
Public Exploit ✅ No
Source NVD
Published 2023-03-01
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
clamav — —
secure-endpoint 8.0.1.21160 8.1.5
secure-endpoint-private-cloud — 3.6.0
stormshield-network-security 4.4.0 4.6.4
web-security-appliance 15.0.0 15.0.0-254

Similar Threats

Exploit Protection

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CVE-2023-20032 carries CVSS 9.8 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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