Home/CVE/Traefik is an open source HTTP reverse proxy and load balancer. When Traefik is configured to use the `HTTPChallenge` to
CVE

CVE-2023-47124

Traefik is an open source HTTP reverse proxy and load balancer. When Traefik is configured to use the `HTTPChallenge` to

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.

MEDIUM · CVSS 5.9 EPSS 0.00227
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-772Missing Release of Resource after Effective Lifetime
▤

Affected Products & Versions

2
traefik<= 2.10.5
traefikall versions
▤

Affected Packages

3
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/traefik/traefik
Go github.com/traefik/traefik/v2 MODERATE fixed in 2.10.6
Go github.com/traefik/traefik/v3 MODERATE fixed in 3.0.0-beta5
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Dec 2023 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

2
suse-csafopenSUSE-SU-2024:14076-1
suse-csafopenSUSE-SU-2024:13506-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://doc.traefik.io/traefik/https/acme/#dnschallengeProduct
https://doc.traefik.io/traefik/https/acme/#httpchallengeProduct
https://doc.traefik.io/traefik/https/acme/#tlschallengeProduct
https://github.com/traefik/traefik/releases/tag/v2.10.6Release Notes
https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5Release Notes
https://github.com/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2fThird Party Advisory
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