CVE-2017-7921 Explained : Impact and Mitigation

A vulnerability in Hikvision Cameras has been identified, allowing for improper authentication and potential elevation of privileges for malicious users.

Understanding CVE-2017-7921

What is CVE-2017-7921?

An Improper Authentication issue was discovered in various Hikvision camera series, potentially enabling unauthorized access to sensitive information.

The Impact of CVE-2017-7921

Insufficient or incorrect user authentication can lead to an elevation of privileges for a malicious user, compromising sensitive data.

Technical Details of CVE-2017-7921

Vulnerability Description

The vulnerability affects Hikvision DS-2CD2xx2F-I, DS-2CD2xx0F-I, DS-2CD2xx2FWD, DS-2CD4x2xFWD, DS-2CD4xx5, DS-2DFx, and DS-2CD63xx Series devices due to improper authentication mechanisms.

Affected Systems and Versions

Hikvision DS-2CD2xx2F-I Series V5.2.0 build 140721 to V5.4.0 build 160530
DS-2CD2xx0F-I Series V5.2.0 build 140721 to V5.4.0 Build 160401
DS-2CD2xx2FWD Series V5.3.1 build 150410 to V5.4.4 Build 161125
DS-2CD4x2xFWD Series V5.2.0 build 140721 to V5.4.0 Build 160414
DS-2CD4xx5 Series V5.2.0 build 140721 to V5.4.0 Build 160421
DS-2DFx Series V5.2.0 build 140805 to V5.4.5 Build 160928
DS-2CD63xx Series V5.0.9 build 140305 to V5.3.5 Build 160106

Exploitation Mechanism

Improper authentication by the application allows malicious users to escalate privileges, potentially gaining unauthorized access to sensitive data.

Mitigation and Prevention

Immediate Steps to Take

Update affected Hikvision cameras to the latest firmware versions.
Implement strong, unique passwords for all camera devices.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly audit and review user access controls.
Conduct security training for users to prevent social engineering attacks.

Patching and Updates

Stay informed about security advisories and updates from Hikvision.