CVE-2023-47124
Medium
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`.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Traefik
PublishedDec 4, 2023
First seenDec 4, 2023
Weakness typeCWE-772CWE-772
How to fix
Update
- github.com/traefik/traefik/v22.10.6 or later
- github.com/traefik/traefik/v33.0.0-beta5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| traefik traefik | v ≤ 2.10.5, 3.0.0 | — |
| github.com/traefik/traefik/v2Go | v < 2.10.6 | 2.10.6 |
| github.com/traefik/traefik/v3Go | v < 3.0.0-beta5 | 3.0.0-beta5 |
| github.com/traefik/traefikGo | No range specified | — |
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