CVE-2017-8838 : Security Advisory and Response
Learn about CVE-2017-8838 affecting Peplink Balance devices. Understand the XSS vulnerability through syncid and how to mitigate the risk with firmware updates.
Peplink Balance devices, including models 305, 380, 580, 710, 1350, and 2500, are vulnerable to cross-site scripting (XSS) through syncid.
Understanding CVE-2017-8838
What is CVE-2017-8838?
CVE-2017-8838 is a vulnerability that affects Peplink Balance devices due to cross-site scripting (XSS) through syncid.
The Impact of CVE-2017-8838
This vulnerability allows attackers to execute malicious scripts on affected devices, potentially leading to unauthorized access or data theft.
Technical Details of CVE-2017-8838
Vulnerability Description
The vulnerability exists in Peplink Balance devices with firmware versions earlier than fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-build2093, specifically in the script cgi-bin/HASync/hasync.cgi.
Affected Systems and Versions
- Peplink Balance models 305, 380, 580, 710, 1350, and 2500
- Devices with firmware versions before fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-build2093
Exploitation Mechanism
The vulnerability is exploited through the syncid parameter, allowing attackers to inject and execute malicious scripts.
Mitigation and Prevention
Immediate Steps to Take
- Update affected devices to firmware version fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-build2093 or later
- Monitor network traffic for any suspicious activities
Long-Term Security Practices
- Regularly update firmware and security patches
- Implement network segmentation to limit the impact of potential attacks
Patching and Updates
- Peplink has released firmware updates addressing this vulnerability. Ensure timely installation of these patches.