Parser hang via oversized line-number overflow
Published Apr 6, 2023 · Updated Feb 13, 2025
Integer overflow in Go standard library go/scanner before 1.19.8 and 1.20.0-0 through 1.20.2 allows attackers to hang parsers. Scanner.updateLineInfo accepts an oversized decimal line number from a //line directive and permits integer wraparound, leaving parsing in a nonterminating loop. Reachability requires an application to pass attacker-controlled Go source text to a Parse function, and the resulting service impact is confined to a parser hang.
Summary
What happened
Integer overflow in Go standard library go/scanner before 1.19.8 and 1.20.0-0 through 1.20.2 allows attackers to hang parsers. Scanner.updateLineInfo accepts an oversized decimal line number from a //line directive and permits integer wraparound, leaving parsing in a nonterminating loop. Reachability requires an application to pass attacker-controlled Go source text to a Parse function, and the resulting service impact is confined to a parser hang.
The record
- CVE
- CVE-2023-24537
- Published
- Apr 6, 2023
- Updated
- Feb 13, 2025
- Vendor
- Go standard library
- Product
- go/scanner
- Classifications
- CWE-190, CWE-835, T1499
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Apr 6, 2023CVE publishedPublication date reported by the CVE source.
- Feb 13, 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=0 <1.19.8
- Affected versionversion=1.20.0-0 <1.20.3
What conditions does exploitation require?
What is affected?
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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