18 August 2016
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.1983 Cisco Adaptive Security Appliance CLI Remote Code Execution Vulnerability 18 August 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Adaptive Security Appliance Software Publisher: Cisco Systems Operating System: Cisco Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-6367 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-cli Comment: Cisco Systems has confirmed the existence of an exploit targeting CVE-2016-6367 in the wild. - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Adaptive Security Appliance CLI Remote Code Execution Vulnerability Medium Advisory ID: cisco-sa-20160817-asa-cli First Published: 2016 August 17 18:45 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCtu74257 CVSS Score: Base 6.8, Temporal 5.9 CVE-2016-6367 CWE-119 Summary A vulnerability in the command-line interface (CLI) parser of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, local attacker to create a denial of service (DoS) condition or potentially execute arbitrary code. An attacker could exploit this vulnerability by invoking certain invalid commands in an affected device. 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-20160817-asa-cli Affected Products Vulnerable Products Cisco Adaptive Security Appliance (ASA) Software Releases earlier than 8.4(1) are vulnerable. An attacker must have local access and be authenticated to exploit this vulnerability. Affected Cisco ASA Software running on the following products may be affected by this vulnerability: Cisco ASA 5500 Series Adaptive Security Appliances Cisco ASA 5500-X Series Next-Generation Firewalls Cisco PIX Firewalls Cisco Firewall Services Module (FWSM) Refer to the "Fixed Software" section for additional information about fixed releases. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds There are no workarounds that address this vulnerability. An attacker must be authenticated to trigger this vulnerability. Given their role in a customers infrastructure, networking devices are a valuable target for threat actors and should be protected as such. Cisco recommends that customers of all networking vendors include in their operational procedures methods for preventing and detecting compromise. Please refer to the Cisco Guide to Harden Cisco ASA Firewall, which contains information to help secure Cisco ASA devices and increase the overall security of the network. Fixed Software When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Fixed Releases This vulnerability has been fixed in Cisco ASA Software Releases 8.4.1 and later. All previous releases are affected. Exploitation and Public Announcements On August 15, 2016, Cisco was alerted to information posted online by the Shadow Brokers group, which claimed to possess disclosures from the Equation Group. The posted materials included exploits for firewall products from multiple vendors. The Cisco products mentioned were the PIX and ASA firewalls. Source The exploit of this vulnerability was publicly disclosed by the alleged Shadow Brokers group. URL http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-cli Revision History Version Description Section Status Date 1.0 Initial public release. Final 2016-August-17 Legal Disclaimer THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to email@example.com and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: firstname.lastname@example.org Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBV7UTR4x+lLeg9Ub1AQijOBAApokzgqcbvmYPbaq3EXBlADjBmx9ESGB2 o2woYlJVuU6YQlFchFLNfEJa2p56V/4IXV6sLbginWqhv0Q7TXxj3+7jr0+SIshd X+7lLdAB8m5B9wxkUpfsXiwmaKa2q7sZmi6KreGGFcVhtkzc5A2/JFIIfEBGWsYG VRWFEl2iYGNiptiZMh+EJS5I5SQltQWtmqhHIwR9WE9zPQbET7avZQlIewORSfQi FCVmh3fJ3D0eQsIl35rwyu89sWXOsKrlTaf5KiwZLJZlvQmfOyEEsctVTqQF6ldP g/AZ0QoC+dmrioNnSjLBUs932INQZkBWUeMPken6SqTOvfizWTYpDQ5EpxqQfrjR weF3AioRnJRjcVTQ/vvyyQfSc9uemY77/WQq08uVB1uI8bWeue3qHKvjUUv6whCr 2zsJ65XZN76yMaAty+oCDfeBFUkIPGwfMU0etAk44aPt4QDvLBTQT0mfs6uBQ7B+ X3jG39hQxNEo67cXlrAks2Fhdi/4pcb0TA6LTzWJnh3tRdepPvES5UC+cwsRs1jb 63iLIAWu/7+FWiuw61x5ClC+ySItleKXaD+E19tQQSuhjRKw8gUG0uUv4F7WOyQS J2Yr5oIE5YZ81HcNFAEAt7Ie7lk2tp7uNKr9uOaUOiGWwurEQcDG3eWRgpplKSEN +U7ApRF0pwo= =tCvh -----END PGP SIGNATURE-----