CVE-2018-7539 : Exploit Details and Defense Strategies
Learn about CVE-2018-7539, a vulnerability in Appear TV XC5000 and XC5100 devices allowing unauthorized access to OS files via HTTP requests. Find mitigation steps and long-term security practices.
CVE-2018-7539 was published on April 17, 2018, and involves a vulnerability in Appear TV XC5000 and XC5100 devices with firmware version 3.26.217. An attacker can access OS files by sending a specially crafted HTTP request to the web server running the Maintenance Center on TCP port 8088.
Understanding CVE-2018-7539
This CVE entry highlights a directory traversal vulnerability that can lead to a complete compromise of the affected devices.
What is CVE-2018-7539?
The vulnerability allows unauthorized access to OS files on Appear TV XC5000 and XC5100 devices by exploiting a flaw in the web server's handling of HTTP requests.
The Impact of CVE-2018-7539
Exploiting this vulnerability can result in a full compromise of the affected devices, potentially exposing sensitive information and allowing unauthorized control.
Technical Details of CVE-2018-7539
This section delves into the specifics of the vulnerability.
Vulnerability Description
By sending a specifically designed HTTP request to the web server running the Maintenance Center on TCP port 8088, an attacker can access OS files, such as the passwd file, leading to a complete compromise of the device.
Affected Systems and Versions
- Devices: Appear TV XC5000 and XC5100
- Firmware Version: 3.26.217
Exploitation Mechanism
The vulnerability is exploited by sending a crafted HTTP request like GET /../../../../../../../../../../../../etc/passwd to the web server, allowing unauthorized access to sensitive files.
Mitigation and Prevention
Protecting systems from CVE-2018-7539 requires immediate action and long-term security practices.
Immediate Steps to Take
- Disable access to the Maintenance Center on TCP port 8088 if not essential
- Implement network segmentation to restrict access to vulnerable devices
Long-Term Security Practices
- Regularly update firmware and security patches
- Conduct security assessments and penetration testing to identify vulnerabilities
Patching and Updates
- Apply patches provided by the vendor to address the vulnerability and enhance device security