CVE-2019-1750 : What You Need to Know
Learn about CVE-2019-1750, a vulnerability in Cisco IOS XE Software that allows unauthorized attackers to cause device reloads, impacting system availability. Find out the affected systems, exploitation mechanism, and mitigation steps.
A vulnerability in the Easy Virtual Switching System (VSS) in Cisco IOS XE Software on Catalyst 4500 Series Switches could allow an unauthenticated attacker to cause the switches to reload. This vulnerability is triggered by handling Cisco Discovery Protocol (CDP) packets in conjunction with the Easy Virtual Switching System, potentially leading to a denial of service (DoS) situation.
Understanding CVE-2019-1750
This CVE involves a vulnerability in Cisco IOS XE Software that could be exploited to force device reloads, impacting system availability.
What is CVE-2019-1750?
The vulnerability in Cisco IOS XE Software on Catalyst 4500 Series Switches allows unauthorized individuals to send specially crafted CDP packets, leading to device reloads and DoS scenarios.
The Impact of CVE-2019-1750
The vulnerability poses a high availability impact, with a CVSS base score of 7.4, potentially resulting in denial of service situations.
Technical Details of CVE-2019-1750
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises from incomplete error handling when processing CDP packets in the Easy Virtual Switching System, enabling attackers to force device reloads.
Affected Systems and Versions
- Cisco IOS XE Software versions 3.6.0E to 3.10.1sE are affected.
Exploitation Mechanism
Attackers can exploit the vulnerability by sending specially crafted CDP packets, triggering device reloads and causing DoS situations.
Mitigation and Prevention
Protecting systems from CVE-2019-1750 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any suspicious CDP packet activity.
Long-Term Security Practices
- Regularly update and patch network devices to address known vulnerabilities.
- Conduct security training for staff to recognize and respond to potential threats.
Patching and Updates
- Cisco has released patches to address the vulnerability. Ensure all affected systems are updated to the latest patched versions.