CVE-2022-20854
Last modified
CVE-2022-20854 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the processing of SSH connections of Cisco Firepower Management Center (FMC) and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling when an SSH session fails to be established. An attacker could exploit this vulnerability by sending a high rate of crafted SSH connections to the instance. EPSS estimates a 0.87% chance of exploitation in the next 30 days.
Description
A vulnerability in the processing of SSH connections of Cisco Firepower Management Center (FMC) and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling when an SSH session fails to be established. An attacker could exploit this vulnerability by sending a high rate of crafted SSH connections to the instance. A successful exploit could allow the attacker to cause resource exhaustion, resulting in a reboot on the affected device.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Secure Firewall Management Center | >= 6.1.0, <= 6.1.0.7 |
| Cisco | Secure Firewall Management Center | >= 6.2.0, <= 6.2.0.6 |
| Cisco | Secure Firewall Management Center | >= 6.2.2, <= 6.2.2.5 |
| Cisco | Secure Firewall Management Center | >= 6.2.3, <= 6.2.3.18 |
| Cisco | Secure Firewall Management Center | >= 6.3.0, <= 6.3.0.5 |
| Cisco | Secure Firewall Management Center | >= 6.4.0, <= 6.4.0.15 |
| Cisco | Secure Firewall Management Center | >= 6.5.0, <= 6.5.0.5 |
| Cisco | Secure Firewall Management Center | >= 6.7.0, <= 6.7.0.3 |
| Cisco | Secure Firewall Management Center | 6.2.1 |
| Cisco | Secure Firewall Management Center | 6.6.0 |
| Cisco | Secure Firewall Management Center | 6.6.0.1 |
| Cisco | Secure Firewall Management Center | 6.6.1 |
| Cisco | Secure Firewall Management Center | 6.6.3 |
| Cisco | Secure Firewall Management Center | 6.6.4 |
| Cisco | Secure Firewall Management Center | 6.6.5 |
| Cisco | Secure Firewall Management Center | 6.6.5.1 |
| Cisco | Secure Firewall Management Center | 6.6.5.2 |
| Cisco | Secure Firewall Management Center | 7.0.0 |
| Cisco | Secure Firewall Management Center | 7.0.0.1 |
| Cisco | Secure Firewall Management Center | 7.0.1 |
| Cisco | Secure Firewall Management Center | 7.0.1.1 |
| Cisco | Secure Firewall Management Center | 7.0.2 |
| Cisco | Secure Firewall Management Center | 7.0.2.1 |
| Cisco | Secure Firewall Management Center | 7.0.3 |
| Cisco | Secure Firewall Management Center | 7.0.4 |
| Cisco | Firepower Threat Defense | >= 6.1.0, <= 6.1.0.7 |
| Cisco | Firepower Threat Defense | >= 6.2.0, <= 6.2.0.6 |
| Cisco | Firepower Threat Defense | >= 6.2.2, <= 6.2.2.5 |
| Cisco | Firepower Threat Defense | >= 6.2.3, <= 6.2.3.18 |
| Cisco | Firepower Threat Defense | >= 6.3.0, <= 6.3.0.5 |
| Cisco | Firepower Threat Defense | >= 6.4.0, <= 6.4.0.15 |
| Cisco | Firepower Threat Defense | >= 6.5.0, <= 6.5.0.5 |
| Cisco | Firepower Threat Defense | >= 6.7.0, <= 6.7.0.3 |
| Cisco | Firepower Threat Defense | 6.2.1 |
| Cisco | Firepower Threat Defense | 6.6.0 |
| Cisco | Firepower Threat Defense | 6.6.0.1 |
| Cisco | Firepower Threat Defense | 6.6.1 |
| Cisco | Firepower Threat Defense | 6.6.3 |
| Cisco | Firepower Threat Defense | 6.6.4 |
| Cisco | Firepower Threat Defense | 6.6.5 |
| Cisco | Firepower Threat Defense | 6.6.5.1 |
| Cisco | Firepower Threat Defense | 6.6.5.2 |
| Cisco | Firepower Threat Defense | 7.0.0 |
| Cisco | Firepower Threat Defense | 7.0.0.1 |
| Cisco | Firepower Threat Defense | 7.0.1 |
| Cisco | Firepower Threat Defense | 7.0.1.1 |
| Cisco | Firepower Threat Defense | 7.0.2 |
| Cisco | Firepower Threat Defense | 7.0.2.1 |
| Cisco | Firepower Threat Defense | 7.0.3 |
| Cisco | Firepower Threat Defense | 7.0.4 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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