CVE-2023-43477 : Vulnerability Insights and Analysis

A post-auth command injection vulnerability has been identified in the Telstra Smart Modem Gen 2 (Arcadyan LH1000) that could allow an authenticated attacker to execute commands as root on the affected device.

Understanding CVE-2023-43477

This section will delve into the specifics of CVE-2023-43477, exploring its impact, technical details, and mitigation strategies.

What is CVE-2023-43477?

The vulnerability exists in the ping_from parameter of ping_tracerte.cgi in the web UI of Telstra Smart Modem Gen 2 (Arcadyan LH1000), firmware versions less than 0.18.15r. This flaw arises from improper sanitization of user input, enabling an attacker with authenticated access to perform command injections as the root user.

The Impact of CVE-2023-43477

The impact of this vulnerability is categorized under CAPEC-248 (Command Injection), signifying the potential severity of unauthorized command execution with high implications on confidentiality, integrity, and availability.

Technical Details of CVE-2023-43477

Let's dive into the technical aspects of CVE-2023-43477, including vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The ping_from parameter in the web UI of Telstra Smart Modem Gen 2 (Arcadyan LH1000) fails to properly sanitize user input, enabling an authenticated attacker to achieve command injection as the root user.

Affected Systems and Versions

The vulnerability impacts Telstra Smart Modem Gen 2 (Arcadyan LH1000) devices running firmware versions lower than 0.18.15r.

Exploitation Mechanism

Exploitation of this vulnerability involves crafting malicious input in the ping_from parameter within the web interface, leveraging improper input handling to execute unauthorized commands.

Mitigation and Prevention

Learn how to address and prevent the exploitation of CVE-2023-43477 through immediate steps and long-term security practices.

Immediate Steps to Take

Upgrade affected Telstra Smart Modem Gen 2 (Arcadyan LH1000) devices to firmware version 0.18.15r or above to mitigate the vulnerability.

Long-Term Security Practices

Implement robust input validation mechanisms in web interfaces to prevent command injections and conduct regular security audits to detect and address similar vulnerabilities.

Patching and Updates

Stay informed about security advisories from Telstra and apply patches promptly to safeguard against known vulnerabilities.