high
7.5
CWE
444
EPSS
0.044%
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2024-21647: HTTP Request/Response Smuggling in puma

First published: Mon Jan 08 2024(Updated: )

### Impact Prior to versions 6.4.2 and 5.6.8, puma exhibited dangerous behavior when parsing chunked transfer encoding bodies. Fixed versions limit the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. ### Patches The vulnerability has been fixed in 6.4.2 and 5.6.8. ### Workarounds No known workarounds. ### References * [HTTP Request Smuggling](https://portswigger.net/web-security/request-smuggling) * Open an issue in [Puma](https://github.com/puma/puma) * See our [security policy](https://github.com/puma/puma/security/policy)

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
rubygems/puma<5.6.8
5.6.8
rubygems/puma>=6.0.0<6.4.2
6.4.2
Puma Puma<5.6.8
Puma Puma>=6.0.0<6.4.2
debian/puma<=3.12.0-2+deb10u2<=3.12.0-2+deb10u3<=4.3.8-1<=4.3.8-1+deb11u2<=5.6.5-3
6.4.2-4
ubuntu/puma<3.12.4-1ubuntu2+
3.12.4-1ubuntu2+
ubuntu/puma<5.5.2-2ubuntu2+
5.5.2-2ubuntu2+
ubuntu/puma<5.6.5-3ubuntu1.2
5.6.5-3ubuntu1.2
ubuntu/puma<5.6.5-4ubuntu2.1
5.6.5-4ubuntu2.1
redhat/puma<6.4.2
6.4.2
redhat/puma<5.6.8
5.6.8

Remedy

https://github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93

Remedy

https://github.com/puma/puma/commit/bbb880ffb6debbfdea535b4b3eb2204d49ae151d

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2024-21647?

    CVE-2024-21647 is considered a high severity vulnerability due to the potential for unbounded resource consumption.

  • How do I fix CVE-2024-21647?

    To resolve CVE-2024-21647, upgrade to Puma version 5.6.8 or 6.4.2 and later.

  • What types of systems are affected by CVE-2024-21647?

    CVE-2024-21647 affects versions of Puma prior to 6.4.2 and 5.6.8 across various platforms including Debian, Ubuntu, and Red Hat.

  • What are the consequences of not addressing CVE-2024-21647?

    Failing to address CVE-2024-21647 can lead to denial of service conditions due to excessive resource usage.

  • Is there a workaround for CVE-2024-21647 until I can upgrade?

    There are no recommended workarounds for CVE-2024-21647; upgrading is the best solution.

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