Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability exists within the SNMP implementation of certain Cisco systems. This flaw allows an authenticated attacker to potentially cause a system reload or execute remote code. The weakness stems from a buffer overflow in the code that handles SNMP packets.
- Vulnerable SNMP implementation
- Buffer overflow in code
- System reload or remote code execution
Attack Path
How an attacker could exploit the issue
An authenticated attacker could exploit a buffer overflow vulnerability in the SNMP implementation. This could lead to unauthorized code execution or system reload. The attacker must possess valid SNMP credentials to initiate the attack.
- Exposure condition: SNMP accessible with credentials.
- Attacker starting point: Authenticated access to the system.
- Trigger and result: Crafted SNMP packet causes code execution or reload.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability in the SNMP implementation of affected systems allows authenticated attackers to potentially reload the system or execute remote code. Exploitation requires sending a crafted SNMP packet to the device. This vulnerability stems from a buffer overflow and impacts SNMP versions 1, 2c, and 3. Successful exploitation could grant an attacker arbitrary code execution and full system control, or cause a system reload.
- Likely attacker skill level: Moderate
- Required access or conditions: Authenticated user credentials or community string.
- Business risk or urgency: High
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
An authenticated remote attacker could exploit this vulnerability by sending a crafted SNMP packet, potentially leading to system reloads or remote code execution. The vulnerability stems from a buffer overflow within the SNMP implementation and requires the attacker to possess SNMP community strings or user credentials. This exploit could grant the attacker full system control or disrupt operations through a system reload.- Find exposed assets.
- Reduce exposure or isolate risk.
- Apply vendor fix, verify, and monitor.
