Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability exists within the SNMP implementation of Cisco IOS and IOS XE Software. This flaw allows an authenticated, remote attacker to potentially execute arbitrary code or cause a system reload by sending a specially crafted SNMP packet. The core of the issue is a buffer overflow within the affected code area. Exploitation requires knowledge of SNMP credentials or community strings.
- Vulnerable SNMP implementation.
- Buffer overflow weakness.
- System control or reload impact.
Attack Path
How an attacker could exploit the issue
An authenticated, remote attacker could exploit a buffer overflow vulnerability within the SNMP implementation of affected systems. This could lead to the system reloading or an attacker executing arbitrary code. To exploit this, the attacker must possess either the SNMP read-only community string or user credentials.
- Vulnerable system is exposed.
- Attacker gains authenticated access.
- Crafted SNMP packet triggers control.
Live Threat
Current exploitation, exposure, and threat context
An authenticated attacker could exploit this vulnerability by sending a crafted SNMP packet. This could lead to remote code execution, granting full system control, or cause a system reload. The risk to organizations is significant due to the potential for complete system compromise.
- Likely attacker skill level: Intermediate
- Required access or conditions: Authenticated access, known community string or credentials
- Business risk or urgency: High, potential for full system compromise
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
A vulnerability exists within the SNMP implementation of Cisco IOS and IOS XE Software that could permit an authenticated, remote attacker to execute code or reload the affected system. This exploit involves sending a specifically crafted SNMP packet. The vulnerability stems from a buffer overflow and requires the attacker to possess SNMP read-only community strings or user credentials. An exploitation of this vulnerability could lead to arbitrary code execution and full system control or a system reload.
- Identify affected systems and assets.
- Reduce exposure or isolate risk.
- Apply vendor fixes and verify.
- Monitor for related issues.
