A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device to be processed. A successful exploit could cause an affected device to continuously consume memory and eventually reload, resulting in a DoS condition.
The vulnerability has been assigned a CVSS score of 8.6, categorizing it as high severity. This score indicates that the potential impact on the availability of the affected systems is significant, necessitating immediate attention from organizations that utilize Cisco IOS or IOS XE Software.
Risk to organizations includes potential interruptions in service due to device reloads, which could disrupt business operations and compromise network reliability. Organizations should prioritize patching immediately.
As of now, this vulnerability is known to be part of the Known Exploited Vulnerabilities (KEV) catalog, indicating that active exploitation may occur. Therefore, it is crucial for organizations to implement remediation strategies as soon as possible.
Vulnerability Details
The vulnerability allows unauthenticated remote attackers to exploit Cisco IOS and IOS XE Software. Specifically, it targets the IKEv2 module, leading to a memory leak or device reload. The publication date of the vulnerability is March 28, 2018.
The CVSS score is 8.6, with the following parameters: attack vector is network-based, attack complexity is low, privileges required are none, and user interaction is not required. The impact on availability is high, indicating a serious risk for network availability.
Technical Analysis
The root cause of this vulnerability arises from the incorrect processing of certain IKEv2 packets by the IKEv2 module. Attackers may exploit this vulnerability by sending specially crafted packets, resulting in the continuous consumption of device memory.
The attack vector is network-based, meaning that the attacker does not need physical access to the device. The attack complexity is low, and no privileges are required to exploit this vulnerability. User interaction is not required, making it a straightforward attack vector for potential exploitation.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is significant, as it can lead to denial of service conditions affecting network devices. Organizations utilizing Cisco IOS or IOS XE Software should be aware of the potential for service interruptions as devices may reload unexpectedly.
The blast radius for this vulnerability is extensive, as it affects multiple versions of Cisco IOS and IOS XE Software. Given the critical nature of network operations, the urgency for addressing this vulnerability is high.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The following versions of Cisco IOS Software and Cisco IOS XE Software are affected by this vulnerability: 15.5(3)s1.1 to 15.5(3)s1.12 for both IOS and IOS XE.
Mitigation & Remediation
Organizations should apply updates per vendor instructions to mitigate this vulnerability. It is crucial to keep Cisco IOS and IOS XE Software updated to the latest versions to protect against potential exploits.
For additional security practices, organizations can consider implementing network segmentation and monitoring network traffic for anomalies.
Continuous penetration testing can also be beneficial in identifying similar weaknesses.
Detection Guidance
Monitoring logs and behavioral anomalies will be crucial in detecting potential exploitation of this vulnerability. Security teams should look for unusual spikes in memory usage or device reloads.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its ability to disrupt critical network services. Organizations must remain vigilant against such vulnerabilities, as they often serve as reminders of the importance of robust security practices.
Security teams should utilize insights gained from this incident to enhance their defensive strategies. Engaging in vulnerability management programs can facilitate the identification of patterns and trends in vulnerability exploitation.
The proactive identification and remediation of vulnerabilities, such as CVE-2018-0158, can significantly strengthen an organization’s security posture.
For additional insights, organizations may find value in reviewing our guide on penetration testing methodology to enhance their understanding of potential security weaknesses.
Lastly, organizations are encouraged to explore VAPT testing services that can help identify and mitigate vulnerabilities in their network environments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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