Unauthenticated metrics disclosure via public HTTP listener
Published Jan 14, 2020 · Updated Sep 16, 2024
Information disclosure in Kubernetes Default Backend before 1.5 allows remote attackers to read Prometheus metrics via ingress traffic. The 404-server registers /metrics on the same public HTTP listener used for invalid ingress requests instead of isolating it on an internal port. No authentication or user interaction is required; exposure is limited to metrics data, with no reported ability to modify data or interrupt service.
Summary
What happened
Information disclosure in Kubernetes Default Backend before 1.5 allows remote attackers to read Prometheus metrics via ingress traffic. The 404-server registers /metrics on the same public HTTP listener used for invalid ingress requests instead of isolating it on an internal port. No authentication or user interaction is required; exposure is limited to metrics data, with no reported ability to modify data or interrupt service.
The record
- CVE
- CVE-2018-1002104
- Published
- Jan 14, 2020
- Updated
- Sep 16, 2024
- Vendor
- Kubernetes
- Product
- Kubernetes Default Backend
- Classifications
- CWE-20, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 14, 2020CVE publishedPublication date reported by the CVE source.
- Sep 16, 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=defaultbackend <1.5
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.
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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