Interpreter crash via built-in pointer dereference
Published Dec 20, 2023 · Updated Aug 2, 2024
Out-of-bounds read in Cesanta MJS 2.20.0 allows attackers to crash the interpreter through a crafted JavaScript property expression. The getprop_builtin_foreign path mistakes a built-in API function value for a foreign pointer and dereferences the supplied index outside valid memory. Exploitation requires execution of attacker-controlled JavaScript; the upstream proof demonstrates a process crash, not code execution or data disclosure.
Summary
What happened
Out-of-bounds read in Cesanta MJS 2.20.0 allows attackers to crash the interpreter through a crafted JavaScript property expression. The getprop_builtin_foreign path mistakes a built-in API function value for a foreign pointer and dereferences the supplied index outside valid memory. Exploitation requires execution of attacker-controlled JavaScript; the upstream proof demonstrates a process crash, not code execution or data disclosure.
The record
- CVE
- CVE-2023-50044
- Published
- Dec 20, 2023
- Updated
- Aug 2, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Dec 20, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
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
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Weakness, pattern, technique
Public exploit references
- getprop_builtin_foreign crash proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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