Information disclosure via stale outline parameter state
Published Apr 14, 2022 · Updated Apr 15, 2025
Out-of-bounds read in Gerbv 2.7.0, forked 2.7.1 and 2.8.0, and dev commit b5f1eacd allows attackers to disclose memory via a crafted file. simplify_aperture_macro retains the prior outline type and sanitized parameter count after an unsupported primitive, then rendering trusts an attacker-controlled vertex count to index beyond the fixed parameter array. Processing the file is required, and the demonstrated consequence is disclosure of process memory through attacker-observable rendered geometry.
Summary
What happened
Out-of-bounds read in Gerbv 2.7.0, forked 2.7.1 and 2.8.0, and dev commit b5f1eacd allows attackers to disclose memory via a crafted file. simplify_aperture_macro retains the prior outline type and sanitized parameter count after an unsupported primitive, then rendering trusts an attacker-controlled vertex count to index beyond the fixed parameter array. Processing the file is required, and the demonstrated consequence is disclosure of process memory through attacker-observable rendered geometry.
The record
- CVE
- CVE-2021-40402
- Published
- Apr 14, 2022
- Updated
- Apr 15, 2025
- Vendor
- Gerbv
- Product
- Gerbv
- Classifications
- CWE-755, CWE-125, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 14, 2022CVE publishedPublication date reported by the CVE source.
- Apr 15, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.7.0
- Affected versionversion=dev (commit b5f1eacd)
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
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Cisco Talos crafted multiple-outline Gerber exampleproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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