Privilege escalation via redirected SPNEGO credential leakage
Published Jan 26, 2021 · Updated Aug 4, 2024
Incorrect authorization in Apache Hadoop WebHDFS clients allows remote authenticated users to capture service credentials through redirects. WebHdfsFileSystem.connect follows an HTTP redirect and forwards its SPNEGO Authorization header without rejecting cleartext HTTP when dfs.http.policy is HTTPS_ONLY. Exploitation requires control of a WebHDFS path used by a privileged impersonation service; affected branches are 2.0.0-alpha through 2.10.0, 3.0.0-alpha1 through 3.1.3, and 3.2.0 through 3.2.1, and captured credentials enable privilege escalation.
Summary
What happened
Incorrect authorization in Apache Hadoop WebHDFS clients allows remote authenticated users to capture service credentials through redirects. WebHdfsFileSystem.connect follows an HTTP redirect and forwards its SPNEGO Authorization header without rejecting cleartext HTTP when dfs.http.policy is HTTPS_ONLY. Exploitation requires control of a WebHDFS path used by a privileged impersonation service; affected branches are 2.0.0-alpha through 2.10.0, 3.0.0-alpha1 through 3.1.3, and 3.2.0 through 3.2.1, and captured credentials enable privilege escalation.
The record
- CVE
- CVE-2020-9492
- Published
- Jan 26, 2021
- Updated
- Aug 4, 2024
- Vendor
- The Apache Software Foundation
- Product
- Apache Hadoop
- Classifications
- CWE-863, T1552
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 26, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Apache Hadoop 3.2.0 to 3.2.1, 3.0.0-alpha1 to 3.1.3, 2.0.0-alpha to 2.10.0
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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