This vulnerability allows multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software, which could permit an unauthenticated, remote attacker to trigger a reload of an affected system. This results in a denial of service (DoS) condition. The severity level is categorized as medium with a CVSS score of 5.9, indicating that it is significant enough to warrant immediate attention but not as critical as higher-severity vulnerabilities.
Organizations should prioritize patching immediately. The affected versions include Cisco IOS Software Release 15.4(2)T, 15.4(3)M, and 15.4(2)CG and later. The risk to organizations includes potential service interruptions and impacts on operational reliability.
Currently, there are no public exploits confirmed for this vulnerability, and it is included in the Known Exploited Vulnerabilities (KEV) catalog, indicating its recognized risk. Defenders should act promptly to mitigate this vulnerability by applying the necessary patches as detailed in the vendor's advisory.
The Cisco PSIRT (Product Security Incident Response Team) has acknowledged this vulnerability, emphasizing the importance of addressing it in the upcoming patch cycle.
Vulnerability Details
The vulnerability stems from multiple weaknesses within the Login Enhancements feature of Cisco IOS Software. The primary CVSS vector is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating that it is network exploitable with high attack complexity and no privileges required for exploitation.
The publication date of the advisory was March 28, 2018, and the vulnerability is classified under CWE-399, which relates to resource management issues.
Technical Analysis
The root cause of this vulnerability is linked to insufficient validation within the Login Enhancements feature. Attackers may leverage this vulnerability by sending crafted packets over the network, which can trigger a reload of the device, causing a denial of service.
The attack vector is through the network, requiring no user interaction, and the availability impact is rated as high, which can significantly disrupt network services.
Risk & Impact Analysis
Real-world deployment risk includes potential interruptions to critical services, particularly in environments relying heavily on Cisco infrastructure. The blast radius potential is significant, as many Cisco devices could be affected, increasing the urgency for organizations to act.
The urgency assessment based on the CVSS score and KEV inclusion indicates that organizations should prioritize remediation efforts. The CVSS score of 5.9 suggests a moderate level of risk, but given the potential service impact, immediate action is recommended.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The affected versions include Cisco IOS Software Release 15.4(2)T, 15.4(3)M, and 15.4(2)CG and later. If there is no specific version information available, it is advisable to consider all versions prior to vendor patch.
Mitigation & Remediation
Organizations are urged to apply updates per vendor instructions to mitigate this vulnerability. Patching should be prioritized immediately to prevent potential service disruptions.
For more information, refer to the vendor advisory provided by Cisco. Organizations should also consider implementing additional security measures such as configuration hardening and network controls.
Detection Guidance
Monitoring for unusual reload patterns and logging indicators related to unauthorized access attempts can help in identifying exploitation attempts. Behavioral anomalies in network traffic to Cisco devices should also be assessed.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its potential to disrupt critical infrastructure. Security teams should note the pattern of vulnerabilities related to network components and ensure a proactive approach to vulnerability management.
Organizations are encouraged to develop comprehensive security strategies that include continuous monitoring and regular security assessments. For further guidance, refer to the continuous penetration testing services that can identify weaknesses before they are exploited.
Additionally, implementing a robust application security assessment can further bolster defenses against potential attacks.
In conclusion, addressing CVE-2018-0179 is essential to maintaining the integrity of Cisco IOS Software environments. Organizations should prioritize patching and consider implementing additional security measures to reduce their risk exposure.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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