Executive Summary

Title Cisco ASA Software DHCPv6 Relay Denial of Service Vulnerability
Name cisco-sa-20151021-asa-dhcp1 First vendor Publication 2015-10-21
Vendor Cisco Last vendor Modification 2015-10-21
Severity (Vendor) N/A Revision 1.0

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:N/A:C)
Cvss Base Score 7.1 Attack Range Network
Cvss Impact Score 6.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


A vulnerability in the DHCPv6 relay feature of Cisco Adaptive Security Appliance (ASA) software could allow an unauthenticated, remote attacker to cause an affected device to reload.

The vulnerability is due to insufficient validation of DHCPv6 packets. Cisco ASA Software is affected by this vulnerability only if the software is configured with the DHCPv6 relay feature. An attacker could exploit this vulnerability by sending crafted DHCPv6 packets to an affected device.

Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151021-asa-dhcp1

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Original Source

Url : http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco (...)

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-399 Resource Management Errors

CPE : Common Platform Enumeration

Application 49

Snort® IPS/IDS

Date Description
2016-03-14 Cisco ASA DHCPv6 relay denial of service attempt
RuleID : 36557 - Revision : 1 - Type : SERVER-OTHER

Nessus® Vulnerability Scanner

Date Description
2016-09-15 Name : The remote device is missing a vendor-supplied security patch.
File : cisco-sa-20151021-asa-dhcp1.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2016-09-16 13:24:48
  • Multiple Updates
2015-10-27 09:28:19
  • Multiple Updates
2015-10-21 21:22:13
  • First insertion