CVE-2018-16221 Explained : Impact and Mitigation
Learn about CVE-2018-16221 affecting Yeahlink Ultra-elegant IP Phone SIP-T41P firmware version 66.83.0.35. Find out how attackers can gain unauthorized access and steps to mitigate the risk.
Yeahlink Ultra-elegant IP Phone SIP-T41P firmware version 66.83.0.35 is vulnerable to path traversal, allowing unauthorized access to sensitive information.
Understanding CVE-2018-16221
The vulnerability in the diagnostics web interface of the Yeahlink Ultra-elegant IP Phone SIP-T41P can be exploited by an authenticated remote attacker to gain unauthorized access to sensitive data.
What is CVE-2018-16221?
The vulnerability in the web interface of the Yeahlink Ultra-elegant IP Phone SIP-T41P allows attackers to access privileged information by manipulating the file parameter in a POST request with relative path information.
The Impact of CVE-2018-16221
This vulnerability enables authenticated remote attackers to gain unauthorized access to sensitive information, such as the "/etc/passwd" file, by exploiting path traversal.
Technical Details of CVE-2018-16221
The technical details of the CVE-2018-16221 vulnerability are as follows:
Vulnerability Description
The diagnostics web interface of the Yeahlink Ultra-elegant IP Phone SIP-T41P lacks proper validation of path information, leading to a path traversal vulnerability.
Affected Systems and Versions
- Product: Yeahlink Ultra-elegant IP Phone SIP-T41P
- Firmware Version: 66.83.0.35
Exploitation Mechanism
- Attackers can exploit the vulnerability by manipulating the file parameter in a POST request with relative path information.
Mitigation and Prevention
To mitigate the risks associated with CVE-2018-16221, consider the following steps:
Immediate Steps to Take
- Implement access controls to restrict unauthorized access to sensitive information.
- Regularly monitor and audit web interfaces for any suspicious activities.
Long-Term Security Practices
- Conduct regular security training for employees to raise awareness of potential vulnerabilities.
- Keep systems and firmware up to date to patch known security issues.
Patching and Updates
- Apply patches and updates provided by Yeahlink to address the path traversal vulnerability in the SIP-T41P firmware.