CVE-2022-24790
moderate-risk
Published 2022-03-30
Puma is a simple, fast, multi-threaded, parallel HTTP 1.1 server for Ruby/Rack applications. When using Puma behind a proxy that does not properly validate that the incoming HTTP request matches the RFC7230 standard, Puma and the frontend proxy may disagree on where a request starts and ends. This would allow requests to be smuggled via the front-end proxy to Puma. The vulnerability has been fixed in 5.6.4 and 4.3.12. Users are advised to upgrade as soon as possible. Workaround: when deploying a proxy in front of Puma, turning on any and all functionality to make sure that the request matches the RFC7230 standard.
Do I need to act?
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0.42% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.1/10
Critical
NETWORK
/ LOW complexity
Affected Products (6)
Affected Vendors
References (16)
Third Party Advisory
https://security.gentoo.org/glsa/202208-28
Third Party Advisory
https://www.debian.org/security/2022/dsa-5146
Third Party Advisory
https://security.gentoo.org/glsa/202208-28
Third Party Advisory
https://www.debian.org/security/2022/dsa-5146
46
/ 100
moderate-risk
Severity
31/34 · Critical
Exploitability
2/34 · Minimal
Exposure
13/34 · Low