CVE-2023-29530 : What You Need to Know
Learn about CVE-2023-29530, a critical vulnerability in Laminas Diactoros versions prior to 2.18.1, allowing for denial of service attacks or application errors. Find out impact, technical details, and mitigation steps here.
A critical vulnerability has been identified in Laminas Diactoros, affecting versions prior to 2.18.1. This vulnerability, assigned CVE-2023-29530, allows malicious users to create HTTP requests or responses that can lead to denial of service attacks or application errors.
Understanding CVE-2023-29530
Laminas Diactoros vulnerable to HTTP Multiline Header Termination.
What is CVE-2023-29530?
Laminas Diactoros provides PSR HTTP Message implementations. In affected versions, users creating HTTP requests or responses with certain newline characters in header keys or values can cause invalid messages, potentially leading to security issues.
The Impact of CVE-2023-29530
The vulnerability in Laminas Diactoros versions prior to 2.18.1 can be exploited by malicious actors to disrupt services or applications, posing a significant risk to the integrity and availability of systems.
Technical Details of CVE-2023-29530
The vulnerability is classified under CWE-20: Improper Input Validation with a CVSS v3.1 base score of 7.5 (High Severity). The attack complexity is low, leveraging the network as the attack vector with high availability impact.
Vulnerability Description
Users providing specific newline characters in HTTP header keys or values can trigger the vulnerability, resulting in denial of service vectors or application errors.
Affected Systems and Versions
- Vendor: laminas
- Product: laminas-diactoros
- Affected Versions: < 2.18.1, = 2.19.0, = 2.20.0, = 2.21.0, = 2.22.0, = 2.23.0, = 2.24.0, = 2.25.0
Exploitation Mechanism
By manipulating HTTP requests or responses with specific newline characters, attackers can exploit the vulnerability to disrupt services or cause errors.
Mitigation and Prevention
To mitigate the risks associated with CVE-2023-29530, users and organizations are advised to take immediate action and implement long-term security practices.
Immediate Steps to Take
- Upgrade Laminas Diactoros to patched versions 2.18.1, 2.19.1, 2.20.1, 2.21.1, 2.22.1, 2.23.1, 2.24.1, or 2.25.1
- Validate HTTP header keys and values
Long-Term Security Practices
- Regularly update software to the latest versions
- Apply input validation mechanisms to prevent similar vulnerabilities
Patching and Updates
Stay informed about security advisories and apply patches promptly to ensure systems are protected against known vulnerabilities.