CVE-2018-0161
CVE-2018-0161
In short
A flaw in Cisco Catalyst Switches allows an authenticated attacker to crash the device by sending a specific SNMP request. When the switch processes this specially crafted network management query, it consumes excessive CPU resources and forces the device to restart, disrupting network service.
Technical detail
The vulnerability exists in the SNMP subsystem when processing GET requests for the ciscoFlashMIB OID on affected Catalyst Switch models running vulnerable IOS releases with SNMPv2 or SNMPv3 enabled. An authenticated remote attacker can trigger excessive CPU usage (SYS-3-CPUHOG condition) leading to device restart and denial of service; no special privileges or user interaction required beyond SNMP access.
Summary generated and translated by AI from the official description.
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial of service (DoS) condition, aka a GET MIB Object ID Denial of Service Vulnerability. The vulnerability is due to a condition that could occur when the affected software processes an SNMP read request that contains a request for the ciscoFlashMIB object ID (OID). An attacker could trigger this vulnerability by issuing an SNMP GET request for the ciscoFlashMIB OID on an affected device. A successful exploit could cause the affected device to restart due to a SYS-3-CPUHOG. This vulnerability affects the following Cisco devices if they are running a vulnerable release of Cisco IOS Software and are configured to use SNMP Version 2 (SNMPv2) or SNMP Version 3 (SNMPv3): Cisco Catalyst 2960-L Series Switches, Cisco Catalyst Digital Building Series Switches 8P, Cisco Catalyst Digital Building Series Switches 8U. Cisco Bug IDs: CSCvd89541.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H