CVE-2017-12355 : What You Need to Know

A vulnerability in the Local Packet Transport Services (LPTS) ingress frame-processing feature of Cisco IOS XR Software could allow an unauthorized attacker to disrupt service by causing an LPTS operation to restart abruptly. This flaw results from incomplete validation of LPTS frames in the affected software, requiring the attacker to send specially crafted XML requests to the management interface of a vulnerable system. Successful exploitation could lead to a temporary denial of service.

Understanding CVE-2017-12355

This CVE involves a flaw in Cisco IOS XR Software that could be exploited by an unauthorized attacker to disrupt service on a compromised system.

What is CVE-2017-12355?

The vulnerability in the Local Packet Transport Services (LPTS) ingress frame-processing feature of Cisco IOS XR Software allows an attacker to restart an LPTS operation abruptly, causing a temporary disruption of service.

The Impact of CVE-2017-12355

The vulnerability could lead to a denial of service condition on affected systems due to the unexpected restart of an LPTS process, affecting LPTS traffic.

Technical Details of CVE-2017-12355

This section provides more technical insights into the vulnerability.

Vulnerability Description

The flaw in the Local Packet Transport Services (LPTS) ingress frame-processing feature of Cisco IOS XR Software allows an attacker to disrupt service by triggering the abrupt restart of an LPTS operation.

Affected Systems and Versions

Product: Cisco IOS XR
Version: Cisco IOS XR

Exploitation Mechanism

To exploit this vulnerability, the attacker must send specifically crafted XML requests to the management interface of a vulnerable system, causing an LPTS process to restart unexpectedly.

Mitigation and Prevention

Protecting systems from CVE-2017-12355 involves taking immediate steps and implementing long-term security practices.

Immediate Steps to Take

Apply the necessary security patches provided by Cisco to address the vulnerability.
Monitor network traffic for any suspicious activity that could indicate an exploitation attempt.

Long-Term Security Practices

Regularly update and patch software to mitigate potential vulnerabilities.
Implement network segmentation to limit the impact of successful attacks.

Patching and Updates

Ensure that all affected systems are updated with the latest patches and security updates to prevent exploitation of this vulnerability.