CVE-2020-24285 Scanner

INTELBRAS TELEFONE IP TIP200 is a VoIP phone used widely in corporate environments for efficient communication. It provides various functionalities catering to consistent voice services, leveraging the IP network. The device is often employed in office settings for seamless telephony solutions, enhancing business communication infrastructure. With sophisticated telephony features, it supports high-quality communications necessary for enterprise-level operations. Businesses rely on it for managing telephony services alongside network configurations, ensuring adaptive communication systems. Regular firmware updates bolster its security and feature set, making it a chosen device for secure and reliable VoIP communications.

Local File Inclusion (LFI) is a vulnerability that enables attackers to manipulate a web application's input to disclose files from a server’s local filesystem. This vulnerability typically arises from inadequate input validation, allowing unauthorized users to access confidential files without appropriate permissions. LFI can expose sensitive information, which can contribute to larger security threats, like facilitating additional exploits such as Remote Code Execution (RCE). Attackers often exploit LFI to gather configuration data or critical system files, posing a significant risk to user data and network integrity. Its exploitation does not typically require prior knowledge, making it a prevalent security concern across various systems. This vulnerability emphasizes the need for securely coded applications to prevent unauthorized access and data breaches.

The INTELBRAS TELEFONE IP TIP200 is vulnerable at the /cgi-bin/export_settings.sh endpoint, which does not properly validate user input. Attackers can exploit this flaw by directly requesting this endpoint to disclose sensitive device configuration data. The lack of authentication checks before allowing file access is the primary flaw leading to this Local File Inclusion vulnerability. When executed, attackers can leverage simple HTTP requests to retrieve confidential files, such as vital device settings. The application fails to filter or sanitize the data paths requested by users, giving illicit access to essential system files. Without these security checks, there is unrestricted file access, leading to potential breaches and exposure of internal configuration details.

The exploitation of this vulnerability may lead to unauthorized disclosure of sensitive files, impacting the device's security posture. Exploiting the issue might provide attackers with critical configuration data or credentials, which can further be used to compromise the network or other connected systems. The disclosed information may reveal internal systems, giving attackers insights essential for launching additional, more sophisticated attacks. Long-term effects involve unauthorized control over devices, eventually leading to degraded network integrity and potential service disruptions. Overall, this vulnerability can severely compromise confidentiality, potentially allowing adversaries to intercept or manipulate device operations at a broader scope. Addressing the issue should be a priority to safeguard sensitive communications and device management.

REFERENCES

• https://github.com/SecLoop/CVE/blob/main/telefone_ip_tip200.md
• https://nvd.nist.gov/vuln/detail/CVE-2020-24285