Vulnerability Description
Multiple vulnerabilities in the Zone-Based Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload or stop forwarding traffic through the firewall. The vulnerabilities are due to incomplete handling of Layer 4 packets through the device. An attacker could exploit these vulnerabilities by sending a certain sequence of traffic patterns through the device. A successful exploit could allow the attacker to cause the device to reload or stop forwarding traffic through the firewall, resulting in a denial of service. For more information about these vulnerabilities, see the Details section of this advisory.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xe | - |
| Cisco | 1100 Integrated Services Router | - |
| Cisco | 1101 Integrated Services Router | - |
| Cisco | 1109 Integrated Services Router | - |
| Cisco | 1111X Integrated Services Router | - |
| Cisco | 111X Integrated Services Router | - |
| Cisco | 1120 Integrated Services Router | - |
| Cisco | 1160 Integrated Services Router | - |
| Cisco | 4221 Integrated Services Router | - |
| Cisco | 4321 Integrated Services Router | - |
| Cisco | 4331 Integrated Services Router | - |
| Cisco | 4351 Integrated Services Router | - |
| Cisco | 4431 Integrated Services Router | - |
| Cisco | 4451-X Integrated Services Router | - |
| Cisco | 4461 Integrated Services Router | - |
| Cisco | Asr 1001-Hx | - |
| Cisco | Asr 1001-X | - |
| Cisco | Asr 1002-Hx | - |
| Cisco | Asr 1002-X | - |
| Cisco | Asr 1004 | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zVendor Advisory
FAQ
What is CVE-2020-3480?
CVE-2020-3480 is a vulnerability with a CVSS score of 8.6 (HIGH). Multiple vulnerabilities in the Zone-Based Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload or stop forwarding traffic through th...
How severe is CVE-2020-3480?
CVE-2020-3480 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-3480?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xe, Cisco 1100 Integrated Services Router, Cisco 1101 Integrated Services Router, Cisco 1109 Integrated Services Router, Cisco 1111X Integrated Services Router.