CVE-2017-3882 : Vulnerability Insights and Analysis
Learn about CVE-2017-3882, a critical vulnerability in Cisco CVR100W Wireless-N VPN Router allowing unauthorized code execution. Find mitigation steps and preventive measures here.
A vulnerability in the Universal Plug-and-Play (UPnP) implementation of the Cisco CVR100W Wireless-N VPN Router allows an attacker within the same Layer 2 network to execute unauthorized code or disrupt services with full administrative privileges.
Understanding CVE-2017-3882
This CVE identifies a critical flaw in the Cisco CVR100W Wireless-N VPN Router that could lead to remote code execution.
What is CVE-2017-3882?
The vulnerability arises from inadequate checks on UPnP input data, potentially resulting in a buffer overflow. Attackers can exploit this by sending a malicious request to the UPnP listening port on the device, enabling them to execute unauthorized code or cause service disruption.
The Impact of CVE-2017-3882
If successfully exploited, this vulnerability allows attackers to execute unauthorized code with full administrative privileges or disrupt services on the affected device.
Technical Details of CVE-2017-3882
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The flaw in the UPnP implementation of the Cisco CVR100W Wireless-N VPN Router allows for remote code execution with root privileges due to incomplete range checks on input data, leading to a buffer overflow.
Affected Systems and Versions
All firmware versions of the Cisco CVR100W Wireless-N VPN Router prior to Firmware Release 1.0.1.22 are impacted by this vulnerability.
Exploitation Mechanism
Attackers need to send a malicious request to the UPnP listening port on the targeted device to exploit this vulnerability, potentially causing the device to restart or run unauthorized code as an administrator.
Mitigation and Prevention
Protecting systems from CVE-2017-3882 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the latest firmware update (Firmware Release 1.0.1.22) provided by Cisco to mitigate the vulnerability.
- Monitor network traffic for any suspicious activity targeting UPnP services.
Long-Term Security Practices
- Regularly update firmware and security patches to prevent future vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
Regularly check for security advisories from Cisco and apply patches promptly to ensure system security.