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CVE-2023-30536

6.5 · MEDIUM

slim/psr7 is a PSR-7 implementation for use with Slim 4.

Published Apr 17, 2023CWE-436EPSS 0.74%

Overview

CVE-2023-30536 is a medium-severity vulnerability. It was published on April 17, 2023 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

slim/psr7 is a PSR-7 implementation for use with Slim 4. In versions prior to 1.6.1 an attacker could sneak in a newline (\n) into both the header names and values. While the specification states that \r\n\r\n is used to terminate the header list, many servers in the wild will also accept \n\n. An attacker that is able to control the header names that are passed to Slilm-Psr7 would be able to intentionally craft invalid messages, possibly causing application errors or invalid HTTP requests being sent out with an PSR-18 HTTP client. The latter might present a denial of service vector if a remote service’s web application firewall bans the application due to the receipt of malformed requests. The issue has been patched in version 1.6.1. There are no known workarounds to this issue. Users are advised to upgrade.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/slimphp/Slim-Psr7/commit/ed1d553225dd190875d8814c47460daed4b550bbGitHubgithub.com/slimphp/Slim-Psr7/security/advisories/GHSA-q2qj-628g-vhfwRefwww.rfc-editor.org/rfc/rfc7230#section-3.2.4GitHubgithub.com/slimphp/Slim-Psr7/commit/ed1d553225dd190875d8814c47460daed4b550bbGitHubgithub.com/slimphp/Slim-Psr7/security/advisories/GHSA-q2qj-628g-vhfwRefwww.rfc-editor.org/rfc/rfc7230#section-3.2.4

How CyberStrike helps

Frequently asked questions

What is CVE-2023-30536?

CVE-2023-30536 is a medium-severity vulnerability. It was published on April 17, 2023 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2023-30536?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-30536?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-30536?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-30536 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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