CVE-2022-20946
Last modified
CVE-2022-20946 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of 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 a memory handling error that occurs when GRE traffic is processed. An attacker could exploit this vulnerability by sending a crafted GRE payload through an affected device. EPSS estimates a 0.87% chance of exploitation in the next 30 days.
Description
A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of 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 a memory handling error that occurs when GRE traffic is processed. An attacker could exploit this vulnerability by sending a crafted GRE payload through an affected device. A successful exploit could allow the attacker to cause the device to restart, resulting in a DoS condition. https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-gre-dos-hmedHQPM ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-gre-dos-hmedHQPM"] This advisory is part of the November 2022 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication.
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 | 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 | >= 6.6.0, <= 6.6.5.2 |
| Cisco | Firepower Threat Defense | >= 6.7.0, <= 6.7.0.3 |
| Cisco | Firepower Threat Defense | >= 7.0.0, <= 7.0.3 |
| Cisco | Firepower Threat Defense | 7.1.0.0 |
| Cisco | Firepower Threat Defense | 7.1.0.1 |
| Cisco | Firepower Threat Defense | 7.1.0.2 |
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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