CVE-2023-45648 : Security Advisory and Response
Learn about CVE-2023-45648 affecting Apache Tomcat versions 8.5.0 through 8.5.93, 9.0.0-M1 through 9.0.81, 10.1.0-M1 through 10.1.13, and 11.0.0-M1 through 11.0.0-M11. Update to secure versions to prevent request smuggling risk.
Apache Tomcat: Trailer header parsing too lenient.
Understanding CVE-2023-45648
This CVE pertains to an Improper Input Validation vulnerability in Apache Tomcat which affects versions 11.0.0-M1 through 11.0.0-M11, 10.1.0-M1 through 10.1.13, 9.0.0-M1 through 9.0.81, and 8.5.0 through 8.5.93.
What is CVE-2023-45648?
Apache Tomcat versions mentioned were found to incorrectly parse HTTP trailer headers. This vulnerability could allow a specially crafted header to cause Tomcat to treat a single request as multiple requests, potentially leading to request smuggling behind a reverse proxy.
The Impact of CVE-2023-45648
The vulnerability could be exploited by attackers to manipulate requests and perform request smuggling attacks, compromising the security and integrity of the system.
Technical Details of CVE-2023-45648
This section provides essential technical details of the CVE.
Vulnerability Description
The vulnerability lies in the improper input validation of HTTP trailer headers in Apache Tomcat, leading to the possibility of request smuggling.
Affected Systems and Versions
Apache Tomcat versions 11.0.0-M1 through 11.0.0-M11, 10.1.0-M1 through 10.1.13, 9.0.0-M1 through 9.0.81, and 8.5.0 through 8.5.93 are affected by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting specially designed HTTP trailer headers to manipulate requests and potentially perform request smuggling attacks.
Mitigation and Prevention
In this section, we outline steps to mitigate and prevent the CVE.
Immediate Steps to Take
Users are advised to upgrade to Apache Tomcat versions 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards, or 8.5.94 onwards to address and fix the vulnerability.
Long-Term Security Practices
Implement secure coding practices, regularly update systems and software, and conduct security assessments to prevent similar vulnerabilities in the future.
Patching and Updates
Stay informed about security advisories and promptly apply patches and updates released by Apache Software Foundation to maintain the security of Apache Tomcat.