CVE-2023-20052

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 7.0% 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-611

Description

On Feb 15, 2023, the following vulnerability in the ClamAV scanning library was disclosed: A vulnerability in the DMG 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 access sensitive information on an affected device. This vulnerability is due to enabling XML entity substitution that may result in XML external entity injection. An attacker could exploit this vulnerability by submitting a crafted DMG file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to leak bytes from any file that may be read by the ClamAV scanning process.

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 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; 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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