04 October 2018
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.3001 Cisco SD-WAN Solution Certificate Validation Bypass Vulnerability 4 October 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco SD-WAN Solution Publisher: Cisco Systems Operating System: Cisco Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-15387 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-sd-wan-bypass - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco SD-WAN Solution Certificate Validation Bypass Vulnerability Priority: High Advisory ID: cisco-sa-20181003-sd-wan-bypass First Published: 2018 October 3 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvk65292 CVE-2018-15387 CWE-20 CVSS Score: Base 8.1 CVSS: 3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X Summary * A vulnerability in the Cisco SD-WAN Solution could allow an unauthenticated, remote attacker to bypass certificate validation on an affected device. The vulnerability is due to improper certificate validation. An attacker could exploit this vulnerability by supplying a system image signed with a crafted certificate to an affected device, bypassing the certificate validation. An exploit could allow an attacker to deploy a crafted system image. 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: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-sd-wan-bypass Affected Products * Vulnerable Products This vulnerability affects Cisco SD-WAN Solution releases prior to Releases 17.2.8 and 18.3.1 running on the following Cisco products: + vBond Orchestrator Software + vEdge 100 Series Routers + vEdge 1000 Series Routers + vEdge 2000 Series Routers + vEdge 5000 Series Routers + vEdge Cloud Router Platform + vManage Network Management Software + vSmart Controller Software Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds * There are no workarounds that address this vulnerability. Fixed Software * Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. 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. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases This vulnerability is fixed in Cisco SD-WAN Solution Releases 17.2.8 and 18.3.1. The software can be downloaded from the Software Center on Cisco.com by clicking Browse all and navigating to the following locations: vBond, vEdge Cloud, vEdge 5000, and vSmart 1. Navigate to Routers > Software-Defined WAN (SD-WAN) > SD-WAN > SD-WAN Software Update. 2. From the left panel, click 18.3.1 under Latest Release. 3. Choose vSmart, vEdge Cloud and vBond 18.3.1 upgrade image. vEdge 100, 1000, and 2000 Series Routers 1. Navigate to Routers > Software-Defined WAN (SD-WAN) > vEdge Router > vEdge Router Model. 2. From the left panel, click 18.3.1 under Latest Release. 3. Choose vEdge 18.3.1 Upgrade Image for vEdge 100b, vEdge 100m, vEdge 1000, vEdge 2000 Routers. vManage Network Management Software 1. Navigate to Routers > Software-Defined WAN (SD-WAN) > SD-WAN > SD-WAN Software Update. 2. From the left panel, click 18.3.1 under Latest Release. 3. Choose vManage 18.3.1 upgrade image. Note: The software for Cisco vEdge 5000 Series Routers can be downloaded from the Viptela Customer Support Portal. 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 reported to Cisco by Joe Ksiazek, a security researcher with Exelon. Cisco Security Vulnerability Policy * 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 * https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-sd-wan-bypass Revision History +-----------------------------------------------------------------------------+ | Version | Description | Section | Status | Date | |----------+---------------------------+----------+--------+------------------| | 1.0 | Initial public release. | ? | Final | 2018-October-03 | +-----------------------------------------------------------------------------+ 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. 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