Unauthenticated access via lowercase HTTP methods
Published Feb 23, 2021 · Updated Aug 4, 2024
Authentication bypass in Keycloak Gatekeeper 1.2.8 and earlier allows remote attackers to reach protected upstream resources. The EnableDefaultDeny option compares HTTP methods case-sensitively, so lowercase method tokens evade rules defined for uppercase methods. Exploitation requires EnableDefaultDeny and an upstream server, such as Jetty, that accepts the lowercase method; the request then reaches content meant to require authentication.
Summary
What happened
Authentication bypass in Keycloak Gatekeeper 1.2.8 and earlier allows remote attackers to reach protected upstream resources. The EnableDefaultDeny option compares HTTP methods case-sensitively, so lowercase method tokens evade rules defined for uppercase methods. Exploitation requires EnableDefaultDeny and an upstream server, such as Jetty, that accepts the lowercase method; the request then reaches content meant to require authentication.
The record
- CVE
- CVE-2020-14359
- Published
- Feb 23, 2021
- Updated
- Aug 4, 2024
- Vendor
- Keycloak
- Product
- Keycloak Gatekeeper
- Classifications
- CWE-305, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 23, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 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?
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- Affected versionversion=all versions as of 2021-02-22
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What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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