Process crash via stale time-zone cache
Published Jan 20, 2022 · Updated Aug 4, 2024
Reachable assertion in JerryScript 3.0.0 allows local users to crash the engine by executing JavaScript that calls Date.prototype.setYear. The Date.prototype.setYear implementation updates the date value without invalidating its cached local time-zone adjustment, so a later consistency check aborts the process. Execution of attacker-supplied JavaScript and user interaction are required, and the demonstrated consequence is a process crash without reported data disclosure or modification.
Summary
What happened
Reachable assertion in JerryScript 3.0.0 allows local users to crash the engine by executing JavaScript that calls Date.prototype.setYear. The Date.prototype.setYear implementation updates the date value without invalidating its cached local time-zone adjustment, so a later consistency check aborts the process. Execution of attacker-supplied JavaScript and user interaction are required, and the demonstrated consequence is a process crash without reported data disclosure or modification.
The record
- CVE
- CVE-2021-46351
- Published
- Jan 20, 2022
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-617
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 20, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
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Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- JerryScript Date.prototype.setYear assertion proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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