CVE-2024-21647

HTTP Request/Response Smuggling in puma

Description

Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies in a way that allowed HTTP request smuggling. Fixed versions limits the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. This vulnerability has been fixed in versions 6.4.2 and 5.6.8.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 1.20% Top 25%
Vendor Advisory github.com
Affected: puma puma
Published at:
Updated at:

References

Link Tags
https://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2 vendor advisory
https://github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93 patch

Frequently Asked Questions

What is the severity of CVE-2024-21647?
CVE-2024-21647 has been scored as a medium severity vulnerability.
How to fix CVE-2024-21647?
To fix CVE-2024-21647, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-21647 being actively exploited in the wild?
It is possible that CVE-2024-21647 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-21647?
CVE-2024-21647 affects puma puma.
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