Executive Risk Summary
"A buffer overflow vulnerability in the Cisco Adaptive Security Appliance (ASA) Software allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets. This vulnerability affects ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices."
Anticipated Attack Path
- 1. Initial Exploitation: Attacker sends crafted IPv4 SNMP packets to the vulnerable ASA device
- 2. Privilege Escalation: Attacker gains control of the ASA device due to the buffer overflow vulnerability
- 3. Lateral Movement: Attacker potentially moves laterally within the network using the compromised ASA device
Am I Vulnerable?
- Verify ASA software version is 9.4.2.3 or earlier
- Check for signs of unauthorized access or suspicious network activity
- Apply the recommended patch or software update from Cisco
Operational Audit Arsenal
Target Type Network Device
Target Asset snmpd
Standard Path Cisco ASA device
Manual Verification Required
This is a non-Windows asset (Cisco). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.
Patch Impact Forecast
Reboot Required Likely
Potential network disruption during patch application
Internal Work Notes
CVE-2016-6366: Buffer overflow vulnerability in Cisco ASA Software - SNMP Service. Apply patch and verify software version.
Technical Intelligence & Operational Utilities • Delivered Weekly
Intelligence Sources
Official Advisoryhttp://blogs.cisco.com/security/shadow-brokers
Official Advisoryhttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-snmp
Official Advisoryhttp://tools.cisco.com/security/center/viewErp.x?alertId=ERP-56516
Official Advisoryhttp://www.securityfocus.com/bid/92521
Official Advisoryhttp://www.securitytracker.com/id/1036637
Official Advisoryhttps://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40258.zip
Official Advisoryhttps://www.exploit-db.com/exploits/40258/
Official Advisoryhttps://zerosum0x0.blogspot.com/2016/09/reverse-engineering-cisco-asa-for.html
Official Advisoryhttp://blogs.cisco.com/security/shadow-brokers
Official Advisoryhttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-snmp
Official Advisoryhttp://tools.cisco.com/security/center/viewErp.x?alertId=ERP-56516
Official Advisoryhttp://www.securityfocus.com/bid/92521
Official Advisoryhttp://www.securitytracker.com/id/1036637
Official Advisoryhttps://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40258.zip
Official Advisoryhttps://www.exploit-db.com/exploits/40258/
Official Advisoryhttps://zerosum0x0.blogspot.com/2016/09/reverse-engineering-cisco-asa-for.html
Official Advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-6366
Related Cisco Threats
Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.