CVE-2023-47124GHSA-8G85-WHQH-CR2FGO-2023-2381
Denial of service whith ACME HTTPChallenge in Traefik
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.10.6, 3.0.0-beta5
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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`.
Timeline
- CVE published
- Record last updated
Affected versions
- traefik traefik
fixed in 2.10.6; From 3.0.0-beta1 · fixed in 3.0.0-beta5
- github.com/traefik/traefik/v2Go
fixed in 2.10.6
- github.com/traefik/traefik/v3Go
fixed in 3.0.0-beta5
- github.com/traefik/traefikGo
All versions