CVE-2023-43478 : Security Advisory and Response
CVE-2023-43478 exposes a critical firmware vulnerability on Telstra Smart Modem Gen 2 (Arcadyan LH1000) devices. Attackers can upload malicious firmware images, leading to unauthorized code execution.
A detailed overview of CVE-2023-43478 focusing on the impact, technical details, and mitigation strategies.
Understanding CVE-2023-43478
This section delves into the essence of CVE-2023-43478 and the repercussions it poses.
What is CVE-2023-43478?
The vulnerability 'fake_upload.cgi' affects Telstra Smart Modem Gen 2 (Arcadyan LH1000) devices with firmware versions less than 0.18.15r. Attackers can exploit this flaw to upload firmware images and configuration backups, potentially leading to unauthorized code execution as root.
The Impact of CVE-2023-43478
The vulnerability, categorized under CAPEC-176 Configuration/Environment Manipulation, has a CVSSv3.1 base score of 8.8 (High Severity). It allows unauthenticated attackers on the same network to compromise device integrity and confidentiality, resulting in significant availability impact.
Technical Details of CVE-2023-43478
Explore the specifics of the vulnerability, affected systems, and exploitation methods.
Vulnerability Description
The 'fake_upload.cgi' flaw enables unauthenticated attackers to manipulate device firmware and configuration, potentially leading to unauthorized code execution with root privileges.
Affected Systems and Versions
Telstra Smart Modem Gen 2 (Arcadyan LH1000) devices with firmware versions less than 0.18.15r are vulnerable to this exploit.
Exploitation Mechanism
Attackers can exploit the vulnerability through unauthorized uploads of firmware images and configuration backups, granting them the ability to alter device firmware and configurations.
Mitigation and Prevention
Discover immediate steps and long-term strategies to mitigate risks associated with CVE-2023-43478.
Immediate Steps to Take
Update affected devices to firmware version 0.18.15r or higher. Implement network segmentation and access controls to restrict unauthorized access.
Long-Term Security Practices
Regularly monitor for security patches and updates from Telstra. Conduct security audits and penetration testing to uncover potential vulnerabilities.
Patching and Updates
Stay informed about security advisories from Telstra and promptly apply patches to ensure devices are protected against known vulnerabilities.