CVE-2023-35944 : Exploit Details and Defense Strategies
Explore the details of CVE-2023-35944 affecting Envoy, an open-source edge and service proxy, leading to security risks due to the incorrect handling of HTTP requests with mixed-case schemes.
A detailed overview of CVE-2023-35944 highlighting the vulnerability, impact, technical details, and mitigation steps.
Understanding CVE-2023-35944
Explore the implications of the vulnerability affecting Envoy due to the incorrect handling of HTTP requests and responses with mixed-case schemes.
What is CVE-2023-35944?
Envoy, an open-source edge and service proxy for cloud-native applications, allows mixed-case schemes in HTTP/2. However, prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, internal scheme checks were case-sensitive. This could result in the rejection of requests with mixed-case schemes or bypassing some requests in unencrypted connections.
The Impact of CVE-2023-35944
This vulnerability could lead to potential security risks such as the rejection or bypassing of HTTP requests, potentially exposing confidential data due to improper input validation.
Technical Details of CVE-2023-35944
Learn more about the vulnerability, affected systems, and exploitation mechanisms.
Vulnerability Description
The issue in Envoy could allow attackers to exploit mixed-case schemes in HTTP/2, leading to the incorrect handling of requests and responses.
Affected Systems and Versions
Envoy versions prior to 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12 are affected by this vulnerability, potentially impacting various deployments.
Exploitation Mechanism
Attackers can manipulate HTTP requests and responses with mixed-case schemes to exploit the vulnerability, potentially compromising the data integrity.
Mitigation and Prevention
Discover the immediate steps and long-term security practices to mitigate the risks associated with CVE-2023-35944.
Immediate Steps to Take
Users are advised to update Envoy to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, or 1.23.12 to address the vulnerability and prevent potential exploitation.
Long-Term Security Practices
Implement strict input validation mechanisms and continuously monitor network traffic for any suspicious activities to enhance overall security posture.
Patching and Updates
Regularly check for security advisories and apply patches promptly to ensure that systems are protected against known vulnerabilities.