Vulnerability Monitor

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CVE-2016-6431

A vulnerability in the local Certificate Authority (CA) feature of Cisco ASA Software before 9.6(1.5) could allow an unauthenticated, remote attacker to cause a reload of the affected system. The vulnerability is due to improper handling of crafted packets during the enrollment operation. An attacker could exploit this vulnerability by sending a crafted enrollment request to the affected system. An exploit could allow the attacker to cause the reload of the affected system. Note: Only HTTPS packets directed to the Cisco ASA interface, where the local CA is allowing user enrollment, can be used to trigger this vulnerability. This vulnerability affects systems configured in routed firewall mode and in single or multiple context mode.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts 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

2016-10-27T21:59:05.763

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

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

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

8.6

Impact Score

6.9

Weaknesses
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco adaptive_security_appliance_software 8.0.2.11 Yes
Operating System cisco adaptive_security_appliance_software 8.0.2.15 Yes
Operating System cisco adaptive_security_appliance_software 8.0.3 Yes
Operating System cisco adaptive_security_appliance_software 8.0.3.6 Yes
Operating System cisco adaptive_security_appliance_software 8.0.3.12 Yes
Operating System cisco adaptive_security_appliance_software 8.0.3.19 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.3 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.9 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.16 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.23 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.25 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.28 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.31 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.32 Yes
Operating System cisco adaptive_security_appliance_software 8.0.4.33 Yes
Operating System cisco adaptive_security_appliance_software 8.0.5 Yes
Operating System cisco adaptive_security_appliance_software 8.0.5.20 Yes
Operating System cisco adaptive_security_appliance_software 8.0.5.23 Yes
Operating System cisco adaptive_security_appliance_software 8.0.5.25 Yes
Operating System cisco adaptive_security_appliance_software 8.0.5.27 Yes
Operating System cisco adaptive_security_appliance_software 8.0.5.28 Yes
Operating System cisco adaptive_security_appliance_software 8.0.5.31 Yes
Operating System cisco adaptive_security_appliance_software 8.1.0.104 Yes
Operating System cisco adaptive_security_appliance_software 8.1.1 Yes
Operating System cisco adaptive_security_appliance_software 8.1.1.6 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.13 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.15 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.16 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.19 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.23 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.24 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.49 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.50 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.55 Yes
Operating System cisco adaptive_security_appliance_software 8.1.2.56 Yes
Operating System cisco adaptive_security_appliance_software 8.2.0.45 Yes
Operating System cisco adaptive_security_appliance_software 8.2.1 Yes
Operating System cisco adaptive_security_appliance_software 8.2.1.11 Yes
Operating System cisco adaptive_security_appliance_software 8.2.2 Yes
Operating System cisco adaptive_security_appliance_software 8.2.2.9 Yes
Operating System cisco adaptive_security_appliance_software 8.2.2.10 Yes
Operating System cisco adaptive_security_appliance_software 8.2.2.12 Yes
Operating System cisco adaptive_security_appliance_software 8.2.2.16 Yes
Operating System cisco adaptive_security_appliance_software 8.2.2.17 Yes
Operating System cisco adaptive_security_appliance_software 8.2.3 Yes
Operating System cisco adaptive_security_appliance_software 8.2.4 Yes
Operating System cisco adaptive_security_appliance_software 8.2.4.1 Yes
Operating System cisco adaptive_security_appliance_software 8.2.4.4 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.13 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.22 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.26 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.33 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.40 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.41 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.46 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.48 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.50 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.52 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.55 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.57 Yes
Operating System cisco adaptive_security_appliance_software 8.2.5.59 Yes
Operating System cisco adaptive_security_appliance_software 8.3.1 Yes
Operating System cisco adaptive_security_appliance_software 8.3.1.1 Yes
Operating System cisco adaptive_security_appliance_software 8.3.1.4 Yes
Operating System cisco adaptive_security_appliance_software 8.3.1.6 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.4 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.13 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.23 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.25 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.31 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.33 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.34 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.37 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.39 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.40 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.41 Yes
Operating System cisco adaptive_security_appliance_software 8.3.2.44 Yes
Operating System cisco adaptive_security_appliance_software 8.4.0 Yes
Operating System cisco adaptive_security_appliance_software 8.4.1 Yes
Operating System cisco adaptive_security_appliance_software 8.4.1.3 Yes
Operating System cisco adaptive_security_appliance_software 8.4.1.11 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 8.6.1 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 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 9.0.4.40 Yes
Operating System cisco adaptive_security_appliance_software 9.1\(7\)4 Yes
Operating System cisco adaptive_security_appliance_software 9.1\(7\)6 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 9.2.4.8 Yes
Operating System cisco adaptive_security_appliance_software 9.2.4.10 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 9.3.3.9 Yes
Operating System cisco adaptive_security_appliance_software 9.3.3.10 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 9.4.3 Yes
Operating System cisco adaptive_security_appliance_software 9.4.3.3 Yes
Operating System cisco adaptive_security_appliance_software 9.4.3.4 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 9.5.2.6 Yes
Operating System cisco adaptive_security_appliance_software 9.5.2.10 Yes
Operating System cisco adaptive_security_appliance_software 9.5.2.14 Yes
Operating System cisco adaptive_security_appliance_software 9.6.0 Yes
Operating System cisco adaptive_security_appliance_software 9.6.1 Yes
Operating System cisco adaptive_security_appliance_software 9.6.1.3 Yes
References

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.