| ID |
CVE-2020-3509
|
| Summary |
A vulnerability in the DHCP message handler of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause the supervisor to crash, which could result in a denial of service (DoS) condition. The vulnerability is due to insufficient error handling when DHCP version 4 (DHCPv4) messages are parsed. An attacker could exploit this vulnerability by sending a malicious DHCPv4 message to or through a WAN interface of an affected device. A successful exploit could allow the attacker to cause a reload of the affected device. Note: On Cisco cBR-8 Converged Broadband Routers, all of the following are considered WAN interfaces: 10 Gbps Ethernet interfaces 100 Gbps Ethernet interfaces Port channel interfaces that include multiple 10 and/or 100 Gbps Ethernet interfaces |
| References |
|
| Vulnerable Configurations |
|
| CVSS |
| Base: | 7.8 (as of 08-10-2020 - 18:16) |
| Impact: | |
| Exploitability: | |
|
| CWE |
CWE-203 |
| CAPEC |
|
| Access |
| Vector | Complexity | Authentication |
| NETWORK |
LOW |
NONE |
|
| Impact |
| Confidentiality | Integrity | Availability |
| NONE |
NONE |
COMPLETE |
|
| cvss-vector
via4
|
AV:N/AC:L/Au:N/C:N/I:N/A:C
|
| refmap
via4
|
| cisco | 20200924 Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers DHCP Denial of Service Vulnerability |
|
| Last major update |
08-10-2020 - 18:16 |
| Published |
24-09-2020 - 18:15 |
| Last modified |
08-10-2020 - 18:16 |
