==================================================================== CERT-Renater Note d'Information No. 2020/VULN491 _____________________________________________________________________ DATE : 03/09/2020 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Cisco Enterprise NFVIS versions prior to 4.2.1. ===================================================================== https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-file-overwrite-UONzPMkr _____________________________________________________________________ Cisco Enterprise NFV Infrastructure Software File Overwrite Vulnerability High Advisory ID: cisco-sa-nfvis-file-overwrite-UONzPMkr First Published: 2020 September 2 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvs54246 CVSS Score: Base 8.1 CVE-2020-3478 CWE-20 Summary A vulnerability in the REST API of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an authenticated, remote attacker to overwrite certain files that should be restricted on an affected device. The vulnerability is due to insufficient authorization enforcement on an affected system. An attacker could exploit this vulnerability by uploading a file using the REST API. A successful exploit could allow an attacker to overwrite and upload files, which could degrade the functionality of the affected system. 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-nfvis-file-overwrite-UONzPMkr Affected Products Vulnerable Products This vulnerability affects Cisco Enterprise NFVIS releases 3.5.1 through 4.1.2. 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 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 Cisco fixed this vulnerability in Cisco Enterprise NFVIS releases 4.2.1 and later. To download the software from the Software Center on Cisco.com, do the following: Click Browse all. Choose Routers > Network Functions Virtualization > Enterprise NFV Infrastructure Software > NFV Infrastructure Software. Choose a release from the left pane of the Enterprise NFV Infrastructure Software page. 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 internal security testing. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-file-overwrite-UONzPMkr Revision History Version Description Section Status Date 1.0 Initial public release. — Final 2020-SEP-02 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. ========================================================= + CERT-RENATER       |    tel : 01-53-94-20-44          + + 23/25 Rue Daviel   |    fax : 01-53-94-20-41          + + 75013 Paris        |    email:cert@support.renater.fr + =========================================================