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Public proof of conceptFix available

CVE-2023-20052

A public proof of concept exists; no exploitation attested.

  • Published2023-03-01
  • WeaknessCWE-611 · CWE-776

Am I affected?

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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.

Timeline

dates in UTC
  1. 2023-03-0108:15CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub

Versions per branch

NVD
Clamav
BranchAffectedFixed in
0.103≤ 0.103.7no fix published
0.x≥ 0.104.0, ≤ 0.105.1no fix published
1.0= 1.0.0no fix published
Cisco secure endpoint
BranchAffectedFixed in
8.x≥ 8.0.1.21160, < 8.1.58.1.5
7.5< 7.5.97.5.9
1.21< 1.21.11.21.1
1.20< 1.20.21.20.2
Stormshield stormshield network security
BranchAffectedFixed in
4.x≥ 4.4.0, < 4.6.44.6.4
4.3≥ 4.3.0, < 4.3.174.3.17
3.x≥ 3.8.0, < 3.11.233.11.23
3.x≥ 3.0.0, < 3.7.353.7.35

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • clamavUbuntu:Pro:16.04:LTSall versions · fixed in 0.103.8+dfsg-0ubuntu0.16.04.1+esm1
  • clamavUbuntu:Pro:14.04:LTSall versions · fixed in 0.103.8+dfsg-0ubuntu0.14.04.1+esm1
  • clamavUbuntu:22.04:LTSall versions · fixed in 0.103.8+dfsg-0ubuntu0.22.04.1
  • clamavUbuntu:20.04:LTSall versions · fixed in 0.103.8+dfsg-0ubuntu0.20.04.1
  • clamavUbuntu:18.04:LTSall versions · fixed in 0.103.8+dfsg-0ubuntu0.18.04.1
  • clamavTuxCare:Ubuntu:18.04all versions · fixed in 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els1and 10 other packages
  • clamavTuxCare:CentOS:6all versions · fixed in 1.0.9-1.el6.tuxcare.els1and 8 other packages
  • clamavSUSE:OpenStack Cloud Crowbar 9all versions · fixed in 0.103.8-33.53.1

43 more package ranges on OSV.dev

Full record on NVD

Fix

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.15.3known since 2026-10-23
  • NVDCVSS 3.15.3read 2026-10-23
  • CNAweakness (CWE)CWE-611known since 2026-10-23
  • NVDweakness (CWE)CWE-776read 2026-10-23
  • FIRST EPSSEPSS score7.0 %2026-11-08
  • PoC-in-GitHubproof of concept4known since 2026-11-01
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Published
2023-03-01
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-pcr4-7r58-755h

Frequently asked questions

What is CVE-2023-20052?

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.

Is CVE-2023-20052 actively exploited?

Active exploitation of CVE-2023-20052 has not been confirmed. Its EPSS score was 7.0% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-20052?

CVE-2023-20052 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

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