Advisory Published

USN-6597-1: Puma vulnerability

First published: Thu Jan 25 2024(Updated: )

It was discovered that Puma incorrectly handled parsing chunked transfer encoding bodies. A remote attacker could possibly use this issue to cause Puma to consume resources, leading to a denial of service.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/puma<5.6.5-4ubuntu2.1
5.6.5-4ubuntu2.1
Ubuntu Linux=23.10
All of
ubuntu/puma<5.6.5-3ubuntu1.2
5.6.5-3ubuntu1.2
Ubuntu Linux=23.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6597-1?

    USN-6597-1 is classified as a denial of service vulnerability which allows remote attackers to consume resources.

  • How do I fix USN-6597-1?

    To fix USN-6597-1, upgrade to Puma version 5.6.5-4ubuntu2.1 or 5.6.5-3ubuntu1.2 depending on your Ubuntu version.

  • What systems are affected by USN-6597-1?

    USN-6597-1 affects Ubuntu 23.10 and 23.04 using Puma versions up to 5.6.5-4ubuntu2.1 and 5.6.5-3ubuntu1.2 respectively.

  • Can USN-6597-1 lead to data breaches?

    While USN-6597-1 primarily results in denial of service, it does not directly lead to data breaches as it does not intend to expose sensitive data.

  • How can I mitigate the risk of USN-6597-1?

    To mitigate the risk of USN-6597-1, ensure your Puma installation is updated to the latest patched version.

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