Process-memory disclosure via undersized polyline access
Published Mar 1, 2022 · Updated Aug 4, 2024
Out-of-bounds read in Slic3r libslic3r 1.3.0 allows context-dependent attackers to disclose process memory via a crafted STL file. In GCode.cpp, GCode::extrude() subtracts three from the end iterator of paths.back().polyline.points without verifying that the polyline contains at least three points. Processing an attacker-supplied STL with G-code export is required; the resulting heap over-read exposes adjacent process memory without modifying data or interrupting the application.
Summary
What happened
Out-of-bounds read in Slic3r libslic3r 1.3.0 allows context-dependent attackers to disclose process memory via a crafted STL file. In GCode.cpp, GCode::extrude() subtracts three from the end iterator of paths.back().polyline.points without verifying that the polyline contains at least three points. Processing an attacker-supplied STL with G-code export is required; the resulting heap over-read exposes adjacent process memory without modifying data or interrupting the application.
The record
- CVE
- CVE-2021-44962
- Published
- Mar 1, 2022
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 1, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Slic3r GCode::extrude heap over-read demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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