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AUSCERT External Security Bulletin Redistribution
ESB-2022.1618
Cisco SD-WAN Solution Improper Access Control Vulnerability
14 April 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco SD-WAN
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20716
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sd-wan-file-access-VW36d28P
Comment: CVSS (Max): 7.8 CVE-2022-20716 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Cisco Systems
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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Cisco SD-WAN Solution Improper Access Control Vulnerability
Priority: High
Advisory ID: cisco-sa-sd-wan-file-access-VW36d28P
First Published: 2022 April 13 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvy11382
CVE Names: CVE-2022-20716
CWEs: CWE-284
Summary
o A vulnerability in the CLI of Cisco SD-WAN Software could allow an
authenticated, local attacker to gain escalated privileges.
This vulnerability is due to improper access control on files within the
affected system. A local attacker could exploit this vulnerability by
modifying certain files on the vulnerable device. If successful, the
attacker could gain escalated privileges and take actions on the system
with the privileges of the root user.
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-sd-wan-file-access-VW36d28P
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco products:
SD-WAN vBond Orchestrator Software
SD-WAN vEdge Cloud Routers
SD-WAN vEdge Routers
SD-WAN vManage Software
SD-WAN vSmart Controller Software
For information about which Cisco software releases are vulnerable, see the
Fixed Software section 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.
Cisco has confirmed that this vulnerability does not affect Cisco IOS XE
SD-WAN Software.
Indicators of Compromise
o The Cisco Security Indicators of Compromise Reference Guide lists commonly
observed Indicators of Compromise (IoCs), which can help identify devices
that may have been impacted by the vulnerability disclosed in this Cisco
security advisory.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o Cisco has released free software updates that address the vulnerability
described in this advisory. Customers with service contracts that entitle
them to regular software updates should obtain security fixes through their
usual update channels.
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.
The Cisco Support and Downloads page on Cisco.com provides information
about licensing and downloads. This page can also display customer device
support coverage for customers who use the My Devices tool.
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
In the following table(s), the left column lists Cisco software releases.
The center column indicates whether a release is affected by the
vulnerability described in this advisory and the first release that
includes the fix for this vulnerability. The right column indicates whether
a release is affected by any of the Critical or High SIR vulnerabilities
described in this collection of advisories and which release includes fixes
for those vulnerabilities.
Customers are advised to upgrade to an appropriate fixed software release
as indicated in the following table(s). To ensure a complete upgrade
solution, consider that this advisory is part of a collection that includes
the following advisories:
cisco-sa-sd-wan-file-access-VW36d28P Cisco SD-WAN Solution Improper
Access Control Vulnerability
cisco-sa-sdwan-privesc-vman-tEJFpBSL Cisco SD-WAN vManage Privilege
Escalation Vulnerability
Cisco SD-WAN First Fixed Release First Fixed Release for All
Software for This Vulnerabilities Described in the
Release Vulnerability Collection of Advisories
18.4 Migrate to a fixed Migrate to a fixed release.
release.
19.2 Migrate to a fixed Migrate to a fixed release.
release.
20.3 Migrate to a fixed Migrate to a fixed release.
release.
20.4 Migrate to a fixed Migrate to a fixed release.
release.
20.5 Migrate to a fixed Migrate to a fixed release.
release.
20.6 20.6.1 20.6.1
20.7 20.7.1 20.7.1
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 Cisco would like to thank Joris Oversteyns for reporting this
vulnerability.
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-sd-wan-file-access-VW36d28P
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-APR-13 |
+----------+---------------------------+----------+--------+--------------+
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