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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.0401 Cisco Firepower System Software BitTorrent File Policy Bypass Vulnerability 8 February 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Firepower System Publisher: Cisco Systems Operating System: Cisco Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-0138 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180207-fss - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Firepower System Software BitTorrent File Policy Bypass Vulnerability Medium Advisory ID: cisco-sa-20180207-fss First Published: 2018 February 7 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCve26946 CVSS Score: Base 5.8 CVE-2018-0138 CWE-693 Summary A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass file policies that are configured to block files transmitted to an affected device via the BitTorrent protocol. The vulnerability exists because the affected software does not detect BitTorrent handshake messages correctly. An attacker could exploit this vulnerability by sending a crafted BitTorrent connection request to an affected device. A successful exploit could allow the attacker to bypass file policies that are configured to block files transmitted to the affected device via the BitTorrent protocol. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180207-fss Affected Products Vulnerable Products This vulnerability affects Cisco Firepower System Software. For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. 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. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top of this advisory. 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. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source This vulnerability was found during the resolution of a Cisco TAC support case. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180207-fss Revision History +---------+---------------------------+---------+--------+-------------------+ | Version | Description | Section | Status | Date | +---------+---------------------------+---------+--------+-------------------+ | 1.0 | Initial public release. | - | Final | 2018-February-07 | +---------+---------------------------+---------+--------+-------------------+ 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 auscert@auscert.org.au 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. 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Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au 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 iQIVAwUBWnvhKIx+lLeg9Ub1AQiYbg//UUVy5wehgrh2i2gUbTxrieOR7AhRc1pb mZrY612YHKL2HzIgwSSNwzj7Y3IUM3nLE/HNzILznUGvkW30HsTwC1HYv+NM4p/Q IaVAaV4KST1uqEqdcHVcXDl7vT72YYhS06pJaCeFjH/WI0WHvaPvugVcjU2ekMQ4 teHtKlfGmchdEW6kJK/uRgsWJ0fmK69MOSKBQvVFiyNqYEBtw+GyxILHX9H5dimU fCXf9awOoCxG9egUPbUsjSC+Easv6T7U3PvEgBMd9oTRiMkVYgwVXiaihqW/fqvi O+0nsA6EJ0o/Enj8ILAvqTY5AOfC3G/ETxfiNClMbpxb2Ws+AULfUCQEcAPrV4Yn TZ7juROcrSqFWIvD5GbpuFrqGv+GWVZBSGHh2Z0XausSc2cUzEcbST2xeSmQGmz0 f8VOuVRAAUXexLQe33DeeG/YCxTY0zDLWVqM6UhGTaExMxLG46WQpWwafhCarQ8X aEhKpnEuAPZRH6uwlQyqi36nX8rtGbXJuBuyyYS32M5UeKdVZ7j285YWSu/7fRaX fQDk5L8hLlAhF5Tz41VnVrKEHgJQ/OBbM73DpcvCGZFVCfLogrOOgVkSqyjrih8C 617PUCzmweOUnEAbW4JaI6VWhHydVMgxy+GCi+myu9zsKFzjWS3inNAncO6ks9qg xAjXGpbBBvc= =Uvk8 -----END PGP SIGNATURE-----