Application stall via inefficient cookie-value parsing
Published Jan 18, 2023 · Updated Apr 3, 2025
Regular expression denial of service in Bradley Meck cookiejar before 2.1.4 allows remote attackers to stall applications via cookie input. Cookie.parse and related cookie APIs apply an inefficient regular expression to attacker-controlled values, causing excessive processing as crafted input grows. Reachability requires a consuming application to pass untrusted cookie values or request-header data into these APIs, tying up its event loop for extended periods.
Summary
What happened
Regular expression denial of service in Bradley Meck cookiejar before 2.1.4 allows remote attackers to stall applications via cookie input. Cookie.parse and related cookie APIs apply an inefficient regular expression to attacker-controlled values, causing excessive processing as crafted input grows. Reachability requires a consuming application to pass untrusted cookie values or request-header data into these APIs, tying up its event loop for extended periods.
The record
- CVE
- CVE-2022-25901
- Published
- Jan 18, 2023
- Updated
- Apr 3, 2025
- Vendor
- Bradley Meck
- Product
- cookiejar
- Classifications
- CWE-1333, T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 18, 2023CVE publishedPublication date reported by the CVE source.
- Apr 3, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <*
- Affected versionversion=0 <2.1.4
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
- CookieJar.setCookie ReDoS proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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