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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0099 Cisco Firepower Management Center Disk Utilization Denial of Service Vulnerability 11 January 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Firepower Management Center Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-15458 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-fpwr-mc-dos - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Firepower Management Center Disk Utilization Denial of Service Vulnerability Priority: Medium Advisory ID: cisco-sa-20190109-fpwr-mc-dos First Published: 2019 January 9 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvk20751 CVE-2018-15458 CWE-399 CVSS Score: Base 5.3 CVSS: 3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X CVE-2018-15458 CWE-399 Summary o A vulnerability in the Shell Access Filter feature of Cisco Firepower Management Center (FMC), when used in conjunction with remote authentication, could allow an unauthenticated, remote attacker to cause high disk utilization, resulting in a denial of service (DoS) condition. The vulnerability occurs because the configuration of the Shell Access Filter, when used with a specific type of remote authentication, can cause a system file to have unbounded writes. An attacker could exploit this vulnerability by sending a steady stream of remote authentication requests to the appliance when the specific configuration is applied. Successful exploitation could allow the attacker to increase the size of a system log file so that it consumes most of the disk space. The lack of available disk space could lead to a DoS condition in which the device functions could operate abnormally, making the device unstable. 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-20190109-fpwr-mc-dos Affected Products o Vulnerable Products This vulnerability affects Cisco Firepower Management Center (FMC). For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o 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 o 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 o This vulnerability was found during internal security testing. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-fpwr-mc-dos Revision History +----------+---------------------------+----------+--------+------------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+------------------+ | 1.0 | Initial public release. | -- | Final | 2019-January-09 | +----------+---------------------------+----------+--------+------------------+ Legal Disclaimer o 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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXDfhTWaOgq3Tt24GAQjr2xAAgaLsfsOwOfebOyzwP+TzhpxzvSEyU/X0 hbEnC/1QTDdcitn1caqTPL72S1Jn4wcozJGzss+qzf1k2Uca2dsaTD9HV9ehGo8c bNzH6Hz/OL5aEEewRVKZFcZVAFOk3FQlbgq6zpnvhuTvQhyDq3asvdk/Nd0vS1DE AchTPGm1dGqyJEVeZgEF6SpRbKpXR7HBZrmcCOfVVQ+amz9zgpYz8X2fV1+7v05a lSX4yRWEoGnaiXrae+2oVXu7l6jtD+Zr19SIEA8oM1HxL3IA1GBz5ytB+DJYpfVI AEn45OCVl5WHEJo44KLG77M5xSjPW70k089kkrjRCEptYjGqF0Zswt8nc82+i6ks 7hnKfR9OVsk80+YQ9SY5VjCoEjiE1ya6JIucwHEzHzKxhbr/dtHauKuXz3xPJd2B eh1Adj1CPTjqOr7IlAlfEipyU7QyerjIeAokDzv0Y53rHLBdCTyGZv5RRH9FdC0F Vet5e9daBLkZH2CAYGGI4yNlH/DOxwKz/9FuhxjzNLCpE5m97DF4yqvNez4/3oDl y4dEigk7YeYRSax19RCOdT6TowBGO7Kb36zIruTDpilhbP2CU47h56JZqIX5ejku J2J2Y4H+rSMuGXN1cE4vQ5yp2O/RDhz9sbtrFn6+TMFioeYyqZo4L7PINcroNEXf tkkXy83J8D8= =FbF4 -----END PGP SIGNATURE-----