Authorization bypass via bare-colon hostname confusion
Published Feb 20, 2022 · Updated Aug 2, 2024
Authorization bypass in Unshift.io url-parse before 1.5.8 allows remote attackers to evade hostname checks via a URL with an empty port. The port rule requires at least one digit, so a trailing bare colon remains in the parsed hostname instead of being recognized as an empty port. A consuming application must authorize URLs using that malformed hostname; the mismatch enables hostname-check bypasses that can lead to SSRF, open redirects, or other unauthorized requests.
Summary
What happened
Authorization bypass in Unshift.io url-parse before 1.5.8 allows remote attackers to evade hostname checks via a URL with an empty port. The port rule requires at least one digit, so a trailing bare colon remains in the parsed hostname instead of being recognized as an empty port. A consuming application must authorize URLs using that malformed hostname; the mismatch enables hostname-check bypasses that can lead to SSRF, open redirects, or other unauthorized requests.
The record
- CVE
- CVE-2022-0686
- Published
- Feb 20, 2022
- Updated
- Aug 2, 2024
- Vendor
- Unshift.io
- Product
- url-parse
- Classifications
- CWE-639
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 20, 2022CVE publishedPublication date reported by the CVE source.
- Aug 2, 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=unspecified <1.5.8
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
- Empty-port hostname parsing proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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