CVE-2017-8840 : What You Need to Know

Peplink Balance devices with specific firmware versions are susceptible to debug information disclosure, potentially exposing sensitive data to attackers.

Understanding CVE-2017-8840

Peplink Balance models 305, 380, 580, 710, 1350, and 2500 are affected by a vulnerability that allows unauthorized access to critical information.

What is CVE-2017-8840?

The CVE-2017-8840 vulnerability in Peplink Balance devices enables attackers to extract sensitive data like Master LAN Address, Serial Number, HA Group ID, Virtual IP, and Submitted syncid by sending a direct request to a specific URL.

The Impact of CVE-2017-8840

This vulnerability could lead to a breach of confidentiality and potentially compromise the security and privacy of affected devices and networks.

Technical Details of CVE-2017-8840

Peplink Balance devices with firmware versions prior to fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-build2093 are at risk.

Vulnerability Description

The flaw allows attackers to access sensitive information by exploiting a specific URL endpoint.

Affected Systems and Versions

Peplink Balance models 305, 380, 580, 710, 1350, and 2500
Firmware versions before fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-build2093

Exploitation Mechanism

Attackers can retrieve critical data by making a direct request to cgi-bin/HASync/hasync.cgi?debug=1.

Mitigation and Prevention

To safeguard against CVE-2017-8840, immediate actions and long-term security measures are essential.

Immediate Steps to Take

Update the firmware to version fw-b305hw2_380hw6_580hw2_710hw3_1350hw2_2500-7.0.1-build2093 or later.

Long-Term Security Practices

Regularly monitor for firmware updates and security advisories.
Implement network segmentation and access controls to limit exposure.

Patching and Updates

Stay informed about security patches and apply them promptly to mitigate risks.