CVE-2018-0421
8.6 · HIGHOverview
CVE-2018-0421 is a high-severity vulnerability affecting cisco prime_access_registrar. It was published on October 5, 2018 and has a CVSS 3.0 base score of 8.6 (HIGH).
This vulnerability has a CVSS 3.0 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A vulnerability in TCP connection management in Cisco Prime Access Registrar could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition when the application unexpectedly restarts. The vulnerability is due to incorrect handling of incoming TCP SYN packets to specific listening ports. The improper handling of the TCP SYN packets could cause a system file description to be allocated and not freed. An attacker could exploit this vulnerability by sending a crafted stream of TCP SYN packets to the application. A successful exploit could allow the attacker to cause the application to eventually restart if a file description cannot be obtained.
Remediation
Check the references section for vendor advisories and patches from cisco. Update prime_access_registrar to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cisco | prime_access_registrar | >= 7.3, < 7.3.0.4 | Affected |
| cisco | prime_access_registrar_jumpstart | >= 7.3, < 7.3.0.4 | Affected |
References
Frequently Asked Questions
What is CVE-2018-0421?
CVE-2018-0421 is a high-severity vulnerability affecting cisco prime_access_registrar. It was published on October 5, 2018 and has a CVSS 3.0 base score of 8.6 (HIGH).
How severe is CVE-2018-0421?
This vulnerability has a CVSS 3.0 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-0421?
Check the references section for vendor advisories and patches from cisco. Update prime_access_registrar to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-0421?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-0421 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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