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CVE-2017-12217 : Vulnerability Insights and Analysis

Learn about CVE-2017-12217, a vulnerability in Cisco ASR 5500 System Architecture Evolution Gateways that could lead to a partial denial of service (DoS) attack. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.

A vulnerability in the General Packet Radio Service (GPRS) Tunneling Protocol ingress packet handler of Cisco ASR 5500 System Architecture Evolution (SAE) Gateways could allow an unauthenticated, remote attacker to cause a partial denial of service (DoS) condition on an affected device. The vulnerability arises from inadequate validation of GPRS Tunneling Protocol packet headers.

Understanding CVE-2017-12217

This CVE entry describes a vulnerability in the Cisco ASR 5500 System Architecture Evolution (SAE) Gateways that could lead to a partial denial of service (DoS) attack.

What is CVE-2017-12217?

The vulnerability in the ingress packet handler of the General Packet Radio Service (GPRS) Tunneling Protocol within the Cisco ASR 5500 SAE Gateways could result in a partial DoS scenario on affected devices. The issue stems from insufficient validation of GPRS Tunneling Protocol packet headers.

The Impact of CVE-2017-12217

Exploiting this vulnerability could cause the GTPUMGR process on the affected device to restart unexpectedly, leading to a partial DoS condition. During the process restart, there may be a temporary impact on the flow of traffic passing through the device.

Technical Details of CVE-2017-12217

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability is a result of improper input validation of GPRS Tunneling Protocol packet headers, allowing an attacker to send a manipulated packet to trigger a partial DoS scenario.

Affected Systems and Versions

        Product: Cisco ASR 5500 System Architecture Evolution Gateway
        Version: Cisco ASR 5500 System Architecture Evolution Gateway

Exploitation Mechanism

        An attacker sends a manipulated GPRS Tunneling Protocol packet to the affected device
        Successful exploitation causes the GTPUMGR process to restart, leading to a partial DoS scenario

Mitigation and Prevention

Protecting systems from CVE-2017-12217 requires immediate actions and long-term security practices.

Immediate Steps to Take

        Apply vendor-supplied patches or updates promptly
        Monitor network traffic for any signs of exploitation
        Implement network segmentation to limit the impact of potential attacks

Long-Term Security Practices

        Regularly update and patch all software and firmware
        Conduct security assessments and penetration testing to identify vulnerabilities
        Educate users and administrators about security best practices

Patching and Updates

        Cisco has released patches to address this vulnerability
        Ensure all affected devices are updated with the latest security fixes

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