Vulnerability in Cisco 1100 Integrated Services Router
CVE-2020-3480
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.
EPSS: 0.014 (71.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- 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
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3480?
- CVE-2020-3480 is a high-severity vulnerability in Cisco 1100 Integrated Services Router, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 8.6/10. Published 2020-09-24.
- How severe is CVE-2020-3480?
- High severity. CVSS v3 base score is 8.6 out of 10.