Denial of service via recursive self-routing
Published Dec 4, 2023 · Updated Nov 27, 2024
Denial of service in Traefik Labs Traefik Proxy before 2.10.6 and 3.0.0-beta1 through 3.0.0-beta4 allows remote attackers to hang the server. With the Docker provider enabled, its default rule exposes the Traefik container as a backend, so a request for that container's host name recursively proxies into the same router. An unauthenticated request that knows the container name triggers an endless loop, saturates the CPU, and makes the server unreachable.
Summary
What happened
Denial of service in Traefik Labs Traefik Proxy before 2.10.6 and 3.0.0-beta1 through 3.0.0-beta4 allows remote attackers to hang the server. With the Docker provider enabled, its default rule exposes the Traefik container as a backend, so a request for that container's host name recursively proxies into the same router. An unauthenticated request that knows the container name triggers an endless loop, saturates the CPU, and makes the server unreachable.
The record
- CVE
- CVE-2023-47633
- Published
- Dec 4, 2023
- Updated
- Nov 27, 2024
- Vendor
- Traefik Labs
- Product
- Traefik Proxy
- Classifications
- CWE-400, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 4, 2023CVE publishedPublication date reported by the CVE source.
- Nov 27, 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=< 2.10.6
- Affected versionversion=>= 3.0.0-beta1, < 3.0.0-beta5
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
- Recursive self-route curl proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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