Decompiler crash via out-of-bounds Node move assignment
Published Mar 10, 2023 · Updated Feb 28, 2025
Heap-buffer overflow in WebAssembly WABT 1.0.29 allows context-dependent attackers to crash wasm-decompile with a crafted WASM file. While constructing the decompiler AST, std::rotate reaches Node::operator=(Node&&), which reads four bytes before the allocated Node vector. A user must cause the command-line decompiler to process the file; the published proof of concept demonstrates an AddressSanitizer-detected abort, not code execution.
Summary
What happened
Heap-buffer overflow in WebAssembly WABT 1.0.29 allows context-dependent attackers to crash wasm-decompile with a crafted WASM file. While constructing the decompiler AST, std::rotate reaches Node::operator=(Node&&), which reads four bytes before the allocated Node vector. A user must cause the command-line decompiler to process the file; the published proof of concept demonstrates an AddressSanitizer-detected abort, not code execution.
The record
- CVE
- CVE-2023-27117
- Published
- Mar 10, 2023
- Updated
- Feb 28, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 10, 2023CVE publishedPublication date reported by the CVE source.
- Feb 28, 2025Record 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.
Published CVSS scores
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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
- poc-2.wasm.zipproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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