Vulnerability Monitor

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CVE-2016-6432

A vulnerability in the Identity Firewall feature of Cisco ASA Software before 9.6(2.1) could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. The vulnerability is due to a buffer overflow in the affected code area. An attacker could exploit this vulnerability by sending a crafted NetBIOS packet in response to a NetBIOS probe sent by the ASA software. An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or cause a reload of the affected system. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability affects systems configured in routed and transparent firewall mode and in single or multiple context mode. This vulnerability can be triggered by IPv4 traffic.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.1, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2016, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2016-10-27T21:59:07.200

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 8.1 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

10.0

Weaknesses

Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	adaptive_security_appliance_software	8.4.0	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.2.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.2.8	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.3.8	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.3.9	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4.5	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.4.9	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.5	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.5.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.15	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.22	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.23	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.26	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.28	Yes
Operating System	cisco	adaptive_security_appliance_software	8.4.7.29	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.6	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.7	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.14	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.17	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.18	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.19	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.21	Yes
Operating System	cisco	adaptive_security_appliance_software	8.5.1.24	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.2	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.5	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.10	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.12	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.13	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.14	Yes
Operating System	cisco	adaptive_security_appliance_software	8.6.1.17	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.3	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.4	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.7	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.8	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.11	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.13	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.16	Yes
Operating System	cisco	adaptive_security_appliance_software	8.7.1.17	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.2.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.3.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.3.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.7	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.17	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.20	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.24	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.26	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.29	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.33	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.35	Yes
Operating System	cisco	adaptive_security_appliance_software	9.0.4.37	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1\(7\)4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.1.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.2.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.3.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.4.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5.12	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5.15	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.5.21	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.1.6.10	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2\(0.0\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2\(0.104\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2\(3.1\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.2.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.2.7	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.2.8	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.3.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.3.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.2.4.4	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3\(1.50\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3\(1.105\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3\(2.100\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3\(2.243\)	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.2.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.3.6	Yes
Operating System	cisco	adaptive_security_appliance_software	9.3.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.0.115	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.1.5	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.4.2.3	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.1	Yes
Operating System	cisco	adaptive_security_appliance_software	9.5.2	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.0	Yes
Operating System	cisco	adaptive_security_appliance_software	9.6.1	Yes

References

http://www.securityfocus.com/bid/93784 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1037059 ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-idfw Mitigation, Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/93784 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1037059 (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-idfw Mitigation, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.