Cisco · IOS Software
CVE-2018-0161
Cisco IOS Software Resource Management Errors Vulnerability
What it is
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.
CISA: 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.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: March 17, 2022
More exploited flaws from Cisco
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Mar 3, 2022 | SNMP Remote Code Execution | IOS software | High 8.8 | 7.3% |
| Mar 3, 2022 | Integrated Services Module for VPN Denial-of-Service | IOS Software | High 7.5 | 7.1% |
| Mar 3, 2022 | Denial-of-Service | IOS Software | Medium 6.8 | 4.9% |
| Mar 3, 2022 | Denial-of-Service | IOS Software | Medium 6.8 | 4.9% |
| Mar 3, 2022 | Network Address Translation Denial-of-Service | IOS software | High 7.5 | 7.1% |
| Mar 3, 2022 | for Cisco Integrated Services Routers Denial-of-Service | IOS software | Medium 6.5 | 2.2% |
| Mar 3, 2022 | Common Industrial Protocol Request Denial-of-Service | IOS software | High 7.5 | 7.1% |
| Mar 3, 2022 | Common Industrial Protocol Request Denial-of-Service | IOS software | High 7.5 | 7.1% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.