CVE-2020-3577 describes a denial-of-service vulnerability in Cisco Firepower Threat Defense (FTD) Software, specifically impacting devices configured with Inline Pair or Passive mode interfaces. An unauthenticated, adjacent attacker can exploit insufficient validation of Ethernet frames to either fill the /ngfw partition, requiring manual recovery via Cisco TAC, or cause a process crash leading to a device reload. With a CVSS score of 7.4 (HIGH), this vulnerability has a low attack complexity and high impact on availability. There is no known public exploit code, active exploitation, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 6.3.0.6CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* | ||
>= 6.4.0, < 6.4.0.10CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* | ||
>= 6.5.0, < 6.5.0.5CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* | ||
>= 6.6.0, < 6.6.1CPE matchmatch criteria | cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* |
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
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The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.