Cisco Security Advisory
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CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
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A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to improper validation of fields in Cisco SD-WAN peering messages that are encapsulated in UDP packets. An attacker could exploit this vulnerability by sending crafted UDP messages to the targeted system. A successful exploit could allow the attacker to cause services on the device to fail, resulting in a DoS condition that could impact the targeted device and other devices that depend on it.
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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-dos-KWOdyHnB
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Vulnerable Products
This vulnerability affects the following Cisco products if they are running a Cisco SD-WAN Solution Software release earlier than Release 17.2.7 or 18.3.0:
- SD-WAN vBond Orchestrator Software
- SD-WAN vEdge 100 Series Routers
- SD-WAN vEdge 1000 Series Routers
- SD-WAN vEdge 2000 Series Routers
- SD-WAN vEdge 5000 Series Routers
- SD-WAN vEdge Cloud Router
- SD-WAN vManage Software
- SD-WAN 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.
Cisco has confirmed that this vulnerability does not affect Cisco IOS XE SD-WAN Software.
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There are no workarounds that address this vulnerability.
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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 SD-WAN Solution Software releases 17.2.7 and later and releases 18.3.0 and later.
To ensure a complete upgrade solution, consider that this advisory is part of a collection that includes the following advisories:
- cisco-sa-sdw-dos-KWOdyHnB: Cisco SD-WAN Solution Software Denial of Service Vulnerability
- cisco-sa-sdscred-HfWWfqBj: Cisco SD-WAN Solution Software Static Credentials Vulnerability
- cisco-sa-vedgfpdos-PkqQrnwV: Cisco SD-WAN vEdge Routers Denial of Service Vulnerability
- cisco-sa-fpdos-hORBfd9f: Cisco SD-WAN vEdge Routers Denial of Service Vulnerability
- cisco-sa-clibypvman-sKcLf2L: Cisco SD-WAN vManage Software Command Injection Vulnerability
- cisco-sa-vmdirtrav-eFdAxsJg: Cisco SD-WAN vManage Software Directory Traversal Vulnerability
- cisco-sa-vmanrce-4jtWT28P: Cisco SD-WAN vManage Software Remote Code Execution Vulnerability
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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.
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This vulnerability was found during internal security testing.
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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.
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Show LessVersion Description Section Status Date 1.0 Initial public release. — Final 2020-JUL-15
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