Code execution via unchecked Nef volume index
Published Mar 4, 2021 · Updated Apr 23, 2025
Out-of-bounds read in CGAL 5.1.1 allows remote attackers to execute code by supplying a malformed Nef polygon file. The read_sface function uses an attacker-controlled index plus addInfiBox to access Volume_of and assign sfh->volume without checking vector bounds. Exploitation requires a consuming application to parse the crafted file; the invalid object reference creates type confusion that enables code execution in that application's context.
Summary
What happened
Out-of-bounds read in CGAL 5.1.1 allows remote attackers to execute code by supplying a malformed Nef polygon file. The read_sface function uses an attacker-controlled index plus addInfiBox to access Volume_of and assign sfh->volume without checking vector bounds. Exploitation requires a consuming application to parse the crafted file; the invalid object reference creates type confusion that enables code execution in that application's context.
The record
- CVE
- CVE-2020-35636
- Published
- Mar 4, 2021
- Updated
- Apr 23, 2025
- Vendor
- CGAL Project
- Product
- CGAL
- Classifications
- CWE-129, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 4, 2021CVE publishedPublication date reported by the CVE source.
- Apr 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=CGAL Project libcgal CGAL-5.1.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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