A vulnerability in the TACACS+ client subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.
The vulnerability is due to improper handling of crafted TACACS+ response packets by the affected software. An attacker could exploit this vulnerability by injecting a crafted TACACS+ packet into an existing TACACS+ session between an affected device and a TACACS+ server or by impersonating a known, valid TACACS+ server and sending a crafted TACACS+ packet to an affected device when establishing a connection to the device. To exploit this vulnerability by using either method, the attacker must know the shared TACACS+ secret and the crafted packet must be sent in response to a TACACS+ request from a TACACS+ client. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-tacplus [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-tacplus”]
Vendor | Product | Version | CPE |
---|---|---|---|
cisco | ios | 12.2b | cpe:2.3:o:cisco:ios:12.2b:*:*:*:*:*:*:* |
cisco | ios | 12.2bx | cpe:2.3:o:cisco:ios:12.2bx:*:*:*:*:*:*:* |
cisco | ios | 12.2cx | cpe:2.3:o:cisco:ios:12.2cx:*:*:*:*:*:*:* |
cisco | ios | 12.2cy | cpe:2.3:o:cisco:ios:12.2cy:*:*:*:*:*:*:* |
cisco | ios | 12.3 | cpe:2.3:o:cisco:ios:12.3:*:*:*:*:*:*:* |
cisco | ios | 12.3b | cpe:2.3:o:cisco:ios:12.3b:*:*:*:*:*:*:* |
cisco | ios | 12.3t | cpe:2.3:o:cisco:ios:12.3t:*:*:*:*:*:*:* |
cisco | ios | 12.3xa | cpe:2.3:o:cisco:ios:12.3xa:*:*:*:*:*:*:* |
cisco | ios | 12.3xq | cpe:2.3:o:cisco:ios:12.3xq:*:*:*:*:*:*:* |
cisco | ios | 12.3xn | cpe:2.3:o:cisco:ios:12.3xn:*:*:*:*:*:*:* |