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AUSCERT External Security Bulletin Redistribution
ESB-2016.2449
Cisco ASA Software Identity Firewall Feature Buffer Overflow Vulnerability
20 October 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco ASA
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-6432 CVE-2016-6431
Original Bulletin:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-idfw
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-ca
Comment: This bulletin contains two (2) Cisco Systems security advisories.
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Cisco ASA Software Identity Firewall Feature Buffer Overflow Vulnerability
Advisory ID: cisco-sa-20161019-asa-idfw
Revision: 1.0
For Public Release 2016 October 19 16:00 GMT
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Summary
=======
A vulnerability in the Identity Firewall feature of Cisco ASA Software 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.
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-20161019-asa-idfw
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Cisco ASA Software Local Certificate Authority Denial of Service Vulnerability
Advisory ID: cisco-sa-20161019-asa-ca
Revision: 1.0
For Public Release 2016 October 19 16:00 GMT
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Summary
=======
A vulnerability in the local Certificate Authority (CA) feature of Cisco ASA Software 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.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-ca
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