Service interruption via catastrophic URL regex backtracking
Published Jan 15, 2025 · Updated Feb 3, 2025
Regular expression denial of service in parse-uri 1.0.9 and earlier allows remote authenticated users to interrupt applications via a crafted URL. The URL-checking expression at index.js lines 28–29 applies an inefficient match to long repeated character sequences, causing excessive backtracking. Reachability requires a consuming application to pass an attacker-controlled URL to the parser; the resulting CPU consumption stalls parsing and interrupts the hosting service.
Summary
What happened
Regular expression denial of service in parse-uri 1.0.9 and earlier allows remote authenticated users to interrupt applications via a crafted URL. The URL-checking expression at index.js lines 28–29 applies an inefficient match to long repeated character sequences, causing excessive backtracking. Reachability requires a consuming application to pass an attacker-controlled URL to the parser; the resulting CPU consumption stalls parsing and interrupts the hosting service.
The record
- CVE
- CVE-2024-36751
- Published
- Jan 15, 2025
- Updated
- Feb 3, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-1333, CWE-185, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 15, 2025CVE publishedPublication date reported by the CVE source.
- Feb 3, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
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
- parse-uri crafted URL ReDoS proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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