CVE-2023-47124 - CVE House
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Status published Medium CVE-2023-47124

Denial of service whith ACME HTTPChallenge in Traefik

Vulnerability Description

Traefik is an open source HTTP reverse proxy and load balancer. When Traefik is configured to use the `HTTPChallenge` to generate and renew the Let's Encrypt TLS certificates, the delay authorized to solve the challenge (50 seconds) can be exploited by attackers to achieve a `slowloris attack`. This vulnerability has been patch in version 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. Users unable to upgrade should replace the `HTTPChallenge` with the `TLSChallenge` or the `DNSChallenge`.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

traefik
Vulnerable Versions:
< 2.10.6, >= 3.0.0-beta1, < 3.0.0-beta5

Timeline

Official Publish: December 4th, 2023
Last Modified: December 18th, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-772

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.