CVE-2018-0421 is a high-severity denial-of-service vulnerability affecting Cisco Prime Access Registrar products. It stems from improper handling of TCP SYN packets, leading to unreleased file descriptors and eventual application restarts. An unauthenticated, remote attacker can exploit this with low complexity by sending a crafted stream of SYN packets. While no public exploit code or active exploitation has been observed, the vulnerability has received some community and media attention.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 7.3, < 7.3.0.4CPE matchmatch criteria | cpe:2.3:a:cisco:prime_access_registrar:*:*:*:*:*:*:*:* | ||
>= 8.0, < 8.0.1.1CPE matchmatch criteria | cpe:2.3:a:cisco:prime_access_registrar:*:*:*:*:*:*:*:* | ||
>= 7.3, < 7.3.0.4CPE matchmatch criteria | cpe:2.3:a:cisco:prime_access_registrar_jumpstart:*:*:*:*:*:*:*:* | ||
>= 8.0, < 8.0.1.1CPE matchmatch criteria | cpe:2.3:a:cisco:prime_access_registrar_jumpstart:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.