CVE-2020-3120 is a denial-of-service vulnerability in the Cisco Discovery Protocol (CDP) implementation across Cisco FXOS, IOS XR, and NX-OS Software. An unauthenticated, adjacent attacker can exploit this flaw by sending a malicious CDP packet, leading to system memory exhaustion and a device reload. This vulnerability has a CVSS score of 6.5 (Medium) due to its low attack complexity and the attacker's need for Layer 2 adjacency, but it can result in a complete denial of service. While there are no known public exploits or Metasploit modules, the vulnerability has garnered significant community discussion and media coverage, indicating awareness despite its inactive status on the CISA KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.3.1.173CPE matchmatch criteria | cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:* | ||
>= 2.6, < 2.6.1.187CPE matchmatch criteria | cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:* | ||
>= 2.7, < 2.7.1.106CPE matchmatch criteria | cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:* | ||
2.4CPE matchmatch criteria | cpe:2.3:o:cisco:fxos:2.4:*:*:*:*:*:*:* | ||
5.2.5CPE matchmatch criteria | cpe:2.3:o:cisco:ios_xr:5.2.5:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:A/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, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.