CVE-2023-20032

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 30.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-03-01 · updated 2026-06-17
Weakness: CWE-120

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/"].

Affected products

Cisco Secure Endpoint: before 1.20.2; before 1.21.1; before 7.5.9; from 8.0.1.21160 before 8.1.5 — fixed in 1.20.2, 1.21.1, 7.5.9, 8.1.5
Cisco Secure Endpoint Private Cloud: before 3.6.0 — fixed in 3.6.0
Cisco Web Security Appliance (WSA): before 12.5.6; from 14.0.0 before 14.0.4-005; from 14.5.0 before 14.5.1-013; from 15.0.0 before 15.0.0-254 — fixed in 12.5.6, 14.0.4-005, 14.5.1-013, 15.0.0-254
Cisco ClamAV: through 0.103.7; from 0.104.0 through 0.105.1; 1.0.0, 1.0.0-rc, 1.0.0-rc2
Stormshield Network Security: from 3.0.0 before 3.7.35; from 3.8.0 before 3.11.23; from 4.3.0 before 4.3.17; from 4.4.0 before 4.6.4 — fixed in 3.11.23, 3.7.35, 4.3.17, 4.6.4

How to fix

Upgrade to a fixed version: Cisco Secure Endpoint 1.20.2, 1.21.1, 7.5.9, 8.1.5; Cisco Secure Endpoint Private Cloud 3.6.0; Cisco Web Security Appliance (WSA) 12.5.6, 14.0.4-005, 14.5.1-013, 15.0.0-254; Stormshield Network Security 3.11.23, 3.7.35, 4.3.17, 4.6.4. Check the vendor advisory for mitigations.

References

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