Resource exhaustion in Traefik
CVE-2022-39271
Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer that assists in deploying microservices. There is a potential vulnerability in Traefik managing HTTP/2 connections. A closing HTTP/2 server connection could hang forever because of a subsequent fatal error. This failure mode could be exploited to cause a denial of service. There has been a patch released in versions 2.8.8 and 2.9.0-rc5. There are currently no known workarounds.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.011 (61.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Traefik — versions < 2.8.8, 2.9.0, >= 2.9.0-rc1, < 2.9.0-rc5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (Patch, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory, Release Notes)
- security-advisories@github.com (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2022-39271?
- CVE-2022-39271 is a high-severity vulnerability in Traefik, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2022-10-11.
- How severe is CVE-2022-39271?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-39271 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.