CVE-2023-26104 : Exploit Details and Defense Strategies

This CVE record, assigned by Snyk, highlights a vulnerability in all versions of the package lite-web-server that could lead to Denial of Service (DoS) attacks.

Understanding CVE-2023-26104

This section delves into the specifics of CVE-2023-26104, its impact, technical details, and mitigation strategies.

What is CVE-2023-26104?

The vulnerability identified in CVE-2023-26104 affects lite-web-server versions by allowing an attacker to perform a Denial of Service (DoS) attack. By sending an HTTP request with control characters that cannot be parsed by the decodeURI() function, the attacker can disrupt the server's availability.

The Impact of CVE-2023-26104

The impact of CVE-2023-26104 is categorized as "HIGH" with a base score of 7.5. Although the confidentiality and integrity of the system remain unaffected, the availability of the server is significantly compromised, making it prone to DoS attacks.

Technical Details of CVE-2023-26104

To better understand CVE-2023-26104, let's explore its vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in lite-web-server arises when an attacker sends an HTTP request containing control characters that the decodeURI() function cannot interpret, leading to a DoS situation.

Affected Systems and Versions

All versions of lite-web-server are impacted by CVE-2023-26104. The vulnerability affects systems where lite-web-server is installed, exposing them to potential DoS attacks.

Exploitation Mechanism

Exploiting CVE-2023-26104 involves crafting and sending a malicious HTTP request with control characters that the decodeURI() function is incapable of handling. This action triggers the vulnerability, resulting in a DoS scenario.

Mitigation and Prevention

To address CVE-2023-26104 and enhance overall security posture, specific mitigation steps and long-term security practices should be considered.

Immediate Steps to Take

Update lite-web-server to the latest patched version to mitigate the vulnerability.
Filter incoming HTTP requests to prevent malicious input containing control characters.
Monitor server logs for any unusual HTTP traffic that could indicate a DoS attempt.

Long-Term Security Practices

Implement regular security audits and code reviews to identify and address vulnerabilities promptly.
Educate developers on secure coding practices to prevent similar issues in the future.
Stay informed about security updates and patches for all utilized software components.

Patching and Updates

Stay informed about security patches released by the lite-web-server vendor and promptly apply them to ensure protection against CVE-2023-26104 and other potential vulnerabilities. Regularly updating software components is key to maintaining a secure environment.