CVE-2023-41834 : Exploit Details and Defense Strategies

Apache Flink Stateful Functions allowed HTTP header injection due to Improper Neutralization of CRLF Sequences

Understanding CVE-2023-41834

This CVE-2023-41834 involves a vulnerability in Apache Flink Stateful Functions that allowed HTTP header injection due to the improper neutralization of CRLF sequences.

What is CVE-2023-41834?

The vulnerability in Apache Flink Stateful Functions versions 3.1.0, 3.1.1, and 3.2.0 allowed remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via crafted HTTP requests. This could potentially enable attackers to insert malicious content into the HTTP response sent to the user's browser.

The Impact of CVE-2023-41834

The impact of this vulnerability is considered moderate.

Technical Details of CVE-2023-41834

This section provides detailed technical information regarding the CVE.

Vulnerability Description

The vulnerability is classified under CWE-113 and CWE-74, involving improper neutralization of CRLF sequences in HTTP headers and improper neutralization of special elements in output used by a downstream component.

Affected Systems and Versions

Apache Flink Stateful Functions versions 3.1.0, 3.1.1, and 3.2.0 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting crafted HTTP requests to manipulate HTTP headers and conduct response splitting attacks.

Mitigation and Prevention

To address CVE-2023-41834, users should take immediate and long-term security measures.

Immediate Steps to Take

Users are advised to upgrade to Apache Flink Stateful Functions version 3.3.0 to mitigate the vulnerability effectively.

Long-Term Security Practices

Implement secure coding practices and regularly update software to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security patches and updates released by Apache Software Foundation to ensure the continued protection of systems.