CVE-2018-9010 in TELEFONE IP TIP200
Summary
by MITRE
Intelbras TELEFONE IP TIP200/200 LITE 60.0.75.29 devices allow remote authenticated admins to read arbitrary files via the /cgi-bin/cgiServer.exx page parameter, aka absolute path traversal. In some cases, authentication can be achieved via the admin account with its default admin password.
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Analysis
by VulDB Data Team • 09/04/2024
The vulnerability identified as CVE-2018-9010 affects Intelbras IP Telephone TIP200/200 LITE devices running firmware version 60.0.75.29 and potentially other affected models. This represents a critical security flaw that enables remote authenticated attackers to perform arbitrary file reads through a specific web interface component. The vulnerability exists within the /cgi-bin/cgiServer.exx page parameter, which fails to properly validate user input, creating an absolute path traversal condition that allows attackers to access files outside the intended directory structure. The attack vector requires an authenticated session, meaning that an attacker must first establish valid administrative credentials before exploiting this vulnerability, though default credentials may be available for exploitation.
The technical implementation of this vulnerability stems from insufficient input validation within the web application's file handling mechanism. When the cgiServer.exx component processes requests containing malicious file path parameters, it does not adequately sanitize or restrict the input to prevent directory traversal attacks. This allows an authenticated administrator to craft requests that can access sensitive system files, configuration data, or other restricted resources that should normally be protected from unauthorized access. The vulnerability specifically manifests in the absolute path traversal pattern where attackers can manipulate file paths to navigate beyond the intended web root directory and access arbitrary files on the device's filesystem. This weakness aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal vulnerabilities.
The operational impact of this vulnerability is significant for organizations relying on these IP telephone devices for communication infrastructure. An attacker who gains administrative access through default credentials or credential compromise can extract sensitive information including system configurations, user data, and potentially authentication credentials stored within the device's file system. The ability to read arbitrary files could expose network configuration details, internal system information, or other sensitive data that could be leveraged for further attacks within the network. This vulnerability also creates potential for privilege escalation attacks, as the extracted information might reveal additional attack vectors or system weaknesses that could be exploited by the attacker to gain deeper access to the network infrastructure. The presence of default credentials makes this vulnerability particularly dangerous as it requires minimal initial effort to exploit, potentially allowing attackers to compromise devices without needing to perform additional reconnaissance or credential cracking activities.
Mitigation strategies for this vulnerability should focus on immediate firmware updates from Intelbras to address the path traversal flaw in the web interface component. Organizations should also implement strict access controls for administrative interfaces, ensuring that only authorized personnel have access to these critical systems and that strong, unique passwords are enforced for administrative accounts. Network segmentation and monitoring should be implemented to detect unusual traffic patterns or unauthorized access attempts to these devices. The vulnerability demonstrates the importance of proper input validation and secure coding practices in web applications, as outlined in various security standards and frameworks including the OWASP Top Ten and NIST cybersecurity guidelines. Additionally, regular security audits of network infrastructure devices should be conducted to identify and remediate similar vulnerabilities that may exist in other network equipment or applications within the organization's infrastructure.