CVE-2020-3230 : What You Need to Know
Learn about CVE-2020-3230, a high-severity vulnerability in Cisco IOS and IOS XE Software that allows remote attackers to disrupt IKEv2 security associations, impacting network availability. Find mitigation steps and long-term security practices here.
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent IKEv2 from establishing new security associations.
Understanding CVE-2020-3230
This CVE involves a denial of service vulnerability in Cisco IOS and IOS XE Software due to incorrect handling of crafted IKEv2 SA-Init packets.
What is CVE-2020-3230?
The vulnerability allows an attacker to disrupt IKEv2 security associations by sending crafted packets to the affected device.
The Impact of CVE-2020-3230
- CVSS Base Score: 7.5 (High Severity)
- Attack Vector: Network
- Availability Impact: High
- The vulnerability could lead to a denial of service, preventing the establishment of new security associations.
Technical Details of CVE-2020-3230
This section provides more in-depth technical information about the vulnerability.
Vulnerability Description
- The flaw lies in the IKEv2 implementation in Cisco IOS and IOS XE Software.
- It results from mishandling of crafted IKEv2 SA-Init packets.
Affected Systems and Versions
- Affected Product: Cisco IOS 15.1(2)T
- Vendor: Cisco
- Affected Version: n/a
Exploitation Mechanism
- Attackers can exploit the vulnerability by sending crafted IKEv2 SA-Init packets to the target device.
Mitigation and Prevention
Protecting systems from CVE-2020-3230 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 signs of exploitation.
Long-Term Security Practices
- Regularly update and patch all software and firmware.
- Conduct security training for employees to recognize and report suspicious activities.
- Implement intrusion detection and prevention systems.
- Stay informed about the latest security threats and best practices.
Patching and Updates
- Cisco has likely released patches to address the vulnerability. Ensure all affected systems are updated with the latest security fixes.