high
7.5
CWE
20
Advisory Published
Advisory Published
Updated

CVE-2023-29530: Laminas Diactoros vulnerable to HTTP Multiline Header Termination

First published: Mon Apr 24 2023(Updated: )

### Impact Affected versions of Laminas Diactoros accepted a single line feed (LF / `\n` ) character at the end of a header name. When serializing such a header name containing a line-feed into the on-the-wire representation of a HTTP/1.x message, the resulting message would be syntactically invalid, due to the header line being terminated too early. An attacker that is able to control the header names that are passed to Laminas Diactoros 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. ### Patches The problem has been patched in the following versions: - 2.18.1 - 2.19.1 - 2.20.1 - 2.21.1 - 2.22.1 - 2.23.1 - 2.24.2 - 2.25.2 ### Workarounds Validate HTTP header keys and/or values, and if using user-supplied values, filter them to strip off leading or trailing newline characters before calling `withHeader()`. ### References - CVE-2023-29197 - GHSA-wxmh-65f7-jcvw

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

Affected SoftwareAffected VersionHow to fix
Getlaminas Laminas-diactoros<2.18.1
Getlaminas Laminas-diactoros=2.19.0
Getlaminas Laminas-diactoros=2.20.0
Getlaminas Laminas-diactoros=2.21.0
Getlaminas Laminas-diactoros=2.22.0
Getlaminas Laminas-diactoros=2.23.0
Getlaminas Laminas-diactoros=2.24.0
Getlaminas Laminas-diactoros=2.25.0
Guzzlephp Psr-7<1.9.1
Guzzlephp Psr-7>=2.0.0<2.4.5
Fedoraproject Fedora=38
composer/laminas/laminas-diactoros>=2.25.0<2.25.2
2.25.2
composer/laminas/laminas-diactoros>=2.24.0<2.24.2
2.24.2
composer/laminas/laminas-diactoros=2.23.0
2.23.1
composer/laminas/laminas-diactoros=2.22.0
2.22.1
composer/laminas/laminas-diactoros=2.21.0
2.21.1
composer/laminas/laminas-diactoros=2.20.0
2.20.1
composer/laminas/laminas-diactoros=2.19.0
2.19.1
composer/laminas/laminas-diactoros<2.18.1
2.18.1

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Reference Links

Frequently Asked Questions

  • What is CVE-2023-29530?

    CVE-2023-29530 is a vulnerability in Laminas Diactoros that allows an attacker to perform a newline injection attack.

  • What is the severity of CVE-2023-29530?

    CVE-2023-29530 has a severity rating of 6.5 (High).

  • How does CVE-2023-29530 affect Laminas Diactoros?

    CVE-2023-29530 affects versions 2.18.0 and prior, 2.19.0, 2.20.0, 2.21.0, 2.22.0, 2.23.0, 2.24.0, and 2.25.0 of Laminas Diactoros.

  • How can an attacker exploit CVE-2023-29530?

    An attacker can exploit CVE-2023-29530 by providing a newline at the start or end of a header key or value when creating HTTP requests or responses using Laminas Diactoros.

  • How can I fix CVE-2023-29530?

    To fix CVE-2023-29530, update to a version of Laminas Diactoros that is later than 2.25.0.

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