CVE-2018-0421: Cisco Prime Access Registrar Denial of Service Vulnerability
First published: Fri Oct 05 2018(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Prime Access Registrar | >=7.3<7.3.0.4 | |
| Cisco Prime Access Registrar | >=8.0<8.0.1.1 | |
| Cisco Prime Access Registrar jumpstart | >=7.3<7.3.0.4 | |
| Cisco Prime Access Registrar jumpstart | >=8.0<8.0.1.1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2018-0421?
CVE-2018-0421 has been assigned a high severity rating due to its potential to cause denial of service.
How do I fix CVE-2018-0421?
To fix CVE-2018-0421, upgrade to a patched version of Cisco Prime Access Registrar or apply the available security patches.
Which versions of Cisco Prime Access Registrar are affected by CVE-2018-0421?
CVE-2018-0421 affects Cisco Prime Access Registrar versions prior to 7.3.0.4 and 8.0.1.1.
Can CVE-2018-0421 be exploited remotely?
Yes, CVE-2018-0421 can be exploited remotely by an unauthenticated attacker.
What type of attack does CVE-2018-0421 enable?
CVE-2018-0421 enables a denial of service (DoS) attack that results in application downtime.
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- canonical/cisco prime access registrar
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- version/cisco prime access registrar/8.0
- canonical/cisco prime access registrar jumpstart
- version/cisco prime access registrar jumpstart/7.3
- version/cisco prime access registrar jumpstart/8.0