Process crash via imbalanced-brace parsing loop
Published May 13, 2024 · Updated Nov 6, 2024
Resource exhaustion in Micromatch Braces before 3.0.3 allows attackers to crash a Node.js process with an imbalanced brace pattern. The loop that flattens unmatched blocks in lib/parse.js repeatedly splices nested nodes while retaining parent references, allocating heap memory until the JavaScript limit is reached. Reachability requires a consuming application to pass attacker-controlled brace-pattern input; the bounded consequence is termination of that process.
Summary
What happened
Resource exhaustion in Micromatch Braces before 3.0.3 allows attackers to crash a Node.js process with an imbalanced brace pattern. The loop that flattens unmatched blocks in lib/parse.js repeatedly splices nested nodes while retaining parent references, allocating heap memory until the JavaScript limit is reached. Reachability requires a consuming application to pass attacker-controlled brace-pattern input; the bounded consequence is termination of that process.
The record
- CVE
- CVE-2024-4068
- Published
- May 13, 2024
- Updated
- Nov 6, 2024
- Vendor
- Micromatch
- Product
- Braces
- Classifications
- CWE-1050, CWE-400, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 13, 2024CVE publishedPublication date reported by the CVE source.
- Nov 6, 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 <=3.0.2 changes=[{"at":"3.0.3","status":"unaffected"}]
- Affected versionversion=0 <3.0.3
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
- Imbalanced opening-brace proof of conceptproof of concept · unverified
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Technologies
Your stack
See the directory against your own environment.
Your stack
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