Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Prime Access Registrar | >= 7.3, < 7.3.0.4 |
| Cisco | Prime Access Registrar Jumpstart | >= 7.3, < 7.3.0.4 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/105282Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041684Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- http://www.securityfocus.com/bid/105282Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041684Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
FAQ
What is CVE-2018-0421?
CVE-2018-0421 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 unexpecte...
How severe is CVE-2018-0421?
CVE-2018-0421 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-0421?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Prime Access Registrar, Cisco Prime Access Registrar Jumpstart.