Interpreter crash via out-of-bounds register preservation
Published May 6, 2024 · Updated Aug 5, 2024
A global buffer overflow in Wasm3 0.5.0 allows attackers to crash the interpreter by compiling a crafted WebAssembly module. PreserveRegisterIfOccupied obtains a register stack index and reads its stack type before reallocating the value; the supplied module drives an out-of-bounds global read. Processing the malformed module, including through a host application that accepts untrusted WebAssembly, is required; the demonstrated result is process termination.
Summary
What happened
A global buffer overflow in Wasm3 0.5.0 allows attackers to crash the interpreter by compiling a crafted WebAssembly module. PreserveRegisterIfOccupied obtains a register stack index and reads its stack type before reallocating the value; the supplied module drives an out-of-bounds global read. Processing the malformed module, including through a host application that accepts untrusted WebAssembly, is required; the demonstrated result is process termination.
The record
- CVE
- CVE-2024-34252
- Published
- May 6, 2024
- Updated
- Aug 5, 2024
- Vendor
- Wasm3 Labs
- Product
- Wasm3
- Classifications
- CWE-120, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 6, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2024Record 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=0.5.0
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
- Upstream proof-of-concept WebAssembly moduleproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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