Bug 1217806 (CVE-2023-47124) - VUL-0: CVE-2023-47124: traefik: Potential DDoS whith ACME HTTPChallenge
Summary: VUL-0: CVE-2023-47124: traefik: Potential DDoS whith ACME HTTPChallenge
Status: RESOLVED FIXED
Alias: CVE-2023-47124
Product: openSUSE Tumbleweed
Classification: openSUSE
Component: Security (show other bugs)
Version: Current
Hardware: Other Other
: P3 - Medium : Normal (vote)
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/386932/
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Reported: 2023-12-05 08:06 UTC by SMASH SMASH
Modified: 2024-05-28 11:37 UTC (History)
1 user (show)

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Found By: Security Response Team
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Blocker: ---
Marketing QA Status: ---
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Description SMASH SMASH 2023-12-05 08:06:21 UTC 
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`.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-47124
https://doc.traefik.io/traefik/https/acme/#dnschallenge
https://github.com/traefik/traefik/releases/tag/v2.10.6
https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5
https://github.com/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2f
Comment 1 Alexandre Vicenzi 2024-05-22 13:30:21 UTC 
This was fixed in https://build.opensuse.org/request/show/1132711.
Comment 2 Carlos López 2024-05-28 11:37:12 UTC 
Done, closing.