Denial of service via inefficient number regex
Published Feb 8, 2023 · Updated Mar 10, 2025
Regular expression denial of service in hapi.js Formula before 3.0.1 allows local users to hang a consuming application with crafted input. The parser's numberRx expression combines overlapping optional digit repetitions, causing polynomial processing of rejected numeric tokens. Exploitation requires a consuming application to pass attacker-controlled strings to the parser; the resulting CPU exhaustion affects availability only.
Summary
What happened
Regular expression denial of service in hapi.js Formula before 3.0.1 allows local users to hang a consuming application with crafted input. The parser's numberRx expression combines overlapping optional digit repetitions, causing polynomial processing of rejected numeric tokens. Exploitation requires a consuming application to pass attacker-controlled strings to the parser; the resulting CPU exhaustion affects availability only.
The record
- CVE
- CVE-2023-25166
- Published
- Feb 8, 2023
- Updated
- Mar 10, 2025
- Vendor
- hapi.js
- Product
- Formula
- Classifications
- CWE-1333, T1499.004
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 8, 2023CVE publishedPublication date reported by the CVE source.
- Mar 10, 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?
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- Affected versionversion=< 3.0.1
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
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Technologies
Your stack
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Your stack
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