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Public proof of conceptFix available

CVE-2020-28632

A public proof of concept exists; no exploitation attested.

  • Published2022-04-18
  • WeaknessCWE-125 · CWE-129

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Multiple code execution vulnerabilities exists in the Nef polygon-parsing functionality of CGAL libcgal CGAL-5.1.1. A specially crafted malformed file can lead to an out-of-bounds read and type confusion, which could lead to code execution. An attacker can provide malicious input to trigger any of these vulnerabilities. An oob read vulnerability exists in Nef_S2/SNC_io_parser.h SNC_io_parser<EW>::read_sedge() seh->incident_sface().

Timeline

dates in UTC
  1. 2022-04-1817:15CVE publishedNVD

Versions per branch

NVD
Cgal computational geometry algorithms library
BranchAffectedFixed in
5.1= 5.1.1no fix published
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published

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

Products declared by the CNA1 product

As talos, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • CGAL Project libcgal
    Affected
    • = CGAL-5.1.1no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-05-30

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

  • cgalUbuntu:20.04:LTSall versions · no fixed version listed
  • cgalUbuntu:18.04:LTSall versions · no fixed version listed
  • cgalUbuntu:16.04:LTSall versions · no fixed version listed
  • cgalUbuntu:14.04:LTSall versions · no fixed version listed
  • cgalDebian:14all versions · fixed in 5.2-3
  • cgalDebian:13all versions · fixed in 5.2-3
  • cgalDebian:12all versions · fixed in 5.2-3
  • cgalDebian:10all versions · fixed in 4.13-1+deb10u1

1 more package range on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2025-04-23
  • NVDCVSS 3.18.8read 2026-10-23
  • CNACVSS 3.010known since 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • CNAweakness (CWE)CWE-129known since 2026-10-23
  • NVDweakness (CWE)CWE-125, CWE-129read 2026-10-23
  • FIRST EPSSEPSS score2.3 %2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

  • EUVD-2020-21030same flawENISA EUVD · LicenseRef-ENISA-legal-notice
  • GHSA-8r6f-5p66-vjcgsame flawGitHub Advisory Database · CC-BY-4.0
  • DLA-2649-1advisory covering several CVEsDebian · LicenseRef-unstated
  • DLA-3226-1advisory covering several CVEsDebian · LicenseRef-unstated

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2022-04-18
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-8r6f-5p66-vjcg

Frequently asked questions

What is CVE-2020-28632?

Multiple code execution vulnerabilities exists in the Nef polygon-parsing functionality of CGAL libcgal CGAL-5.1.1. A specially crafted malformed file can lead to an out-of-bounds read and type confusion, which could lead to code execution. An attacker can provide malicious input to trigger any of these vulnerabilities. An oob read vulnerability exists in Nef_S2/SNC_io_parser.h SNC_io_parser<EW>::read_sedge() seh->incident_sface().

Is CVE-2020-28632 actively exploited?

A proof-of-concept exploit exists for CVE-2020-28632, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2020-28632?

CVE-2020-28632 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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