crewjam saml up to 0.4.12 HTTP Request flate.NewReader allocation of resources

Summaryinfo

A vulnerability identified as critical has been detected in crewjam saml up to 0.4.12. This impacts the function flate.NewReader of the component HTTP Request Handler. Performing a manipulation results in allocation of resources. This vulnerability is reported as CVE-2023-28119. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in crewjam saml up to 0.4.12. This affects the function flate.NewReader of the component HTTP Request Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. The summary by CVE is:

The crewjam/saml go library contains a partial implementation of the SAML standard in golang. Prior to version 0.4.13, the package's use of `flate.NewReader` does not limit the size of the input. The user can pass more than 1 MB of data in the HTTP request to the processing functions, which will be decompressed server-side using the Deflate algorithm. Therefore, after repeating the same request multiple times, it is possible to achieve a reliable crash since the operating system kills the process. This issue is patched in version 0.4.13.

The weakness was disclosed 03/22/2023 as GHSA-5mqj-xc49-246p. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2023-28119 since 03/10/2023. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 0.4.13 eliminates this vulnerability. Applying the patch 8e9236867d176ad6338c870a84e2039aef8a5021 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• crewjam

Name

• saml

Version

• 0.4.0
• 0.4.1
• 0.4.2
• 0.4.3
• 0.4.4
• 0.4.5
• 0.4.6
• 0.4.7
• 0.4.8
• 0.4.9
• 0.4.10
• 0.4.11
• 0.4.12

License

• open-source

Website

• Product: https://github.com/crewjam/saml/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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