CVE-2017-17743 : Security Advisory and Response
Learn about CVE-2017-17743 affecting UCOPIA Wireless Appliance devices. Discover how authenticated remote attackers can exploit this vulnerability to escalate privileges and how to mitigate the risk.
UCOPIA Wireless Appliance devices are vulnerable to improper input sanitization, allowing authenticated remote attackers to escalate privileges.
Understanding CVE-2017-17743
This CVE identifies a vulnerability in UCOPIA Wireless Appliance devices that enables attackers to escape the restricted administration shell and elevate their privileges.
What is CVE-2017-17743?
The vulnerability arises from improper input sanitization in the administration shell of UCOPIA Wireless Appliance devices, versions 4.4.20, 5.0.x up to 5.0.19, and 5.1.x up to 5.1.11.
The Impact of CVE-2017-17743
The vulnerability allows authenticated remote attackers to upload a .bashrc file containing the /bin/sh string, enabling them to escape the shell and potentially gain elevated privileges. Additionally, default credentials can be exploited for authentication.
Technical Details of CVE-2017-17743
This section provides detailed technical information about the CVE.
Vulnerability Description
The vulnerability in UCOPIA Wireless Appliance devices allows authenticated remote attackers to escape the shell and increase their privileges by uploading a malicious .bashrc file.
Affected Systems and Versions
- UCOPIA Wireless Appliance devices before versions 4.4.20, 5.0.x before 5.0.19, and 5.1.x before 5.1.11
Exploitation Mechanism
Attackers can exploit the vulnerability by uploading a .bashrc file containing the /bin/sh string, enabling them to escape the shell and potentially escalate their privileges.
Mitigation and Prevention
Protecting systems from CVE-2017-17743 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Change default passwords and implement strong, unique credentials
- Regularly monitor and audit system access and activities
- Apply security patches and updates promptly
Long-Term Security Practices
- Implement least privilege access controls
- Conduct regular security training for users and administrators
- Perform security assessments and penetration testing
Patching and Updates
- Apply patches provided by UCOPIA for the affected versions to mitigate the vulnerability