High severity · published Oct 11, 2022
CVE-2022-39271
Traefik HTTP/2 connections management could cause a denial of service
7.5
CVSS
1.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 71% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TR
traefik · traefik
< 2.8.8; >= 2.9.0-rc1, < 2.9.0-rc5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-39271
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-39271
Release Notes
https://github.com/traefik/traefik/releases/tag/v2.8.8
Release Notes
https://github.com/traefik/traefik/releases/tag/v2.9.0-rc5
Patch
https://github.com/traefik/traefik/security/advisories/GHSA-c6hx-pjc3-7fqr
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