CVE-2023-47124 json
Denial of service whith ACME HTTPChallenge in Traefik
published 2023-12-04 2 y ago modified 2026-08-07 3 mo ago also GHSA-8g85-whqh-cr2f , GO-2023-2381 , EUVD-2023-3160
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
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`.
Patch / fix
- go github.com/traefik/traefik/v2 2.10.6
- go github.com/traefik/traefik/v3 3.0.0-beta5
- traefik2 openSUSE Tumbleweed 2.11.5-1.1
- traefik openSUSE Tumbleweed 2.10.7-1.1
opensuse advisories openSUSE-SU-2024:14076-1openSUSE-SU-2024:13506-1
Exploit prediction
0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/traefik/traefik/v2 | <2.10.6 |
2.10.6 |
| go | github.com/traefik/traefik/v3 | <3.0.0-beta5 |
3.0.0-beta5 |
| go | github.com/traefik/traefik | all versions |
no fix listed |
Affected products
- traefik traefik
Classification
References
-
github.com
/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2f
web, third-party-advisory, advisory
-
doc.traefik.io
/traefik/https/acme/#dnschallenge
web, product
-
doc.traefik.io
/traefik/https/acme/#httpchallenge
web, product
-
doc.traefik.io
/traefik/https/acme/#tlschallenge
web, product
-
github.com
/traefik/traefik/releases/tag/v2.10.6
web, release-notes
-
github.com
/traefik/traefik/releases/tag/v3.0.0-beta5
web, release-notes
-
cloudflare.com
/learning/ddos/ddos-attack-tools/slowloris
web
-
nvd.nist.gov
/vuln/detail/CVE-2023-47124
advisory
-
github.com
/traefik/traefik
package
Sources
- CVE List CVE-2023-47124
- GitHub Advisory GHSA-8g85-whqh-cr2f
- NVD CVE-2023-47124
- OSV GO-2023-2381
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