Script stall via backtracking in function parser
Published Feb 26, 2024 · Updated Aug 9, 2024
Regular expression denial of service in Medikoo es5-ext 0.10.0 through 0.10.62 allows local users to stall a Node.js script. The affected utilities stringify a supplied function and parse its name, parameters, and body with ambiguous regex character classes that trigger excessive backtracking on long or unbalanced input. Reachability requires an application to pass an attacker-influenced function to either utility; the bounded consequence is CPU exhaustion and a stalled script.
Summary
What happened
Regular expression denial of service in Medikoo es5-ext 0.10.0 through 0.10.62 allows local users to stall a Node.js script. The affected utilities stringify a supplied function and parse its name, parameters, and body with ambiguous regex character classes that trigger excessive backtracking on long or unbalanced input. Reachability requires an application to pass an attacker-influenced function to either utility; the bounded consequence is CPU exhaustion and a stalled script.
The record
- CVE
- CVE-2024-27088
- Published
- Feb 26, 2024
- Updated
- Aug 9, 2024
- Vendor
- Medikoo
- Product
- es5-ext
- Classifications
- CWE-1333, CWE-400, T1499
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Feb 26, 2024CVE publishedPublication date reported by the CVE source.
- Aug 9, 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=>= 0.10.0, < 0.10.63
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
- Upstream excessive-backtracking proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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