Process crash via persistent user-input accumulation
Published Jun 7, 2023 · Updated Jan 6, 2025
Denial of service in zxcvbn-ts zxcvbn before 3.0.2 allows attackers to crash Node.js processes through repeated password checks. The zxcvbn function's second argument reaches Options.extendUserInputsDictionary, which persistently appends values to this.dictionary.userInputs on every call. Exploitation requires a consuming application to pass attacker-influenced values repeatedly; browsers require many input changes, while shared Node.js processes aggregate inputs across users.
Summary
What happened
Denial of service in zxcvbn-ts zxcvbn before 3.0.2 allows attackers to crash Node.js processes through repeated password checks. The zxcvbn function's second argument reaches Options.extendUserInputsDictionary, which persistently appends values to this.dictionary.userInputs on every call. Exploitation requires a consuming application to pass attacker-influenced values repeatedly; browsers require many input changes, while shared Node.js processes aggregate inputs across users.
The record
- CVE
- CVE-2023-34109
- Published
- Jun 7, 2023
- Updated
- Jan 6, 2025
- Vendor
- zxcvbn-ts
- Product
- zxcvbn
- Classifications
- CWE-400, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 7, 2023CVE publishedPublication date reported by the CVE source.
- Jan 6, 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=< 3.0.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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