Service interruption via HTTPChallenge retry backoff
Published Dec 4, 2023 · Updated Dec 18, 2024
Resource exhaustion in Traefik Proxy before 2.10.6 and 3.0.0-beta1 through 3.0.0-beta4 allows remote attackers to interrupt service. The ACME HTTPChallenge handler applies a 50-second retry backoff even though its Present method is synchronous, allowing slow requests to retain resources. Exposure requires HTTPChallenge configuration on an Internet-reachable port 80 entry point; sustained slow connections can exhaust service capacity.
Summary
What happened
Resource exhaustion in Traefik Proxy before 2.10.6 and 3.0.0-beta1 through 3.0.0-beta4 allows remote attackers to interrupt service. The ACME HTTPChallenge handler applies a 50-second retry backoff even though its Present method is synchronous, allowing slow requests to retain resources. Exposure requires HTTPChallenge configuration on an Internet-reachable port 80 entry point; sustained slow connections can exhaust service capacity.
The record
- CVE
- CVE-2023-47124
- Published
- Dec 4, 2023
- Updated
- Dec 18, 2024
- Vendor
- Traefik Labs
- Product
- Traefik Proxy
- Classifications
- CWE-772, T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 4, 2023CVE publishedPublication date reported by the CVE source.
- Dec 18, 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
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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