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AUSCERT External Security Bulletin Redistribution
ESB-2022.1622
Cisco SD-WAN vManage Software Privilege Escalation Vulnerability
14 April 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco SD-WAN vManage Software
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20739
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-privesc-vman-tEJFpBSL
Comment: CVSS (Max): 7.3 CVE-2022-20739 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:R/S:U/C:H/I:H/A:H
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Cisco SD-WAN vManage Software Privilege Escalation Vulnerability
Priority: High
Advisory ID: cisco-sa-sdwan-privesc-vman-tEJFpBSL
First Published: 2022 April 13 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvt11537
CVE Names: CVE-2022-20739
CWEs: CWE-269
Summary
o A vulnerability in the CLI of Cisco SD-WAN vManage Software could allow an
authenticated, local attacker to execute arbitrary commands on the
underlying operating system as the root user. The attacker must be
authenticated on the affected system as a low-privileged user to exploit
this vulnerability.
This vulnerability exists because a file leveraged by a root user is
executed when a low-privileged user runs specific commands on an affected
system. An attacker could exploit this vulnerability by injecting arbitrary
commands to a specific file as a lower-privileged user and then waiting
until an admin user executes specific commands. The commands would then be
executed on the device by the root user. A successful exploit could allow
the attacker to escalate their privileges on the affected system from a
low-privileged user to 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-sdwan-privesc-vman-tEJFpBSL
Affected Products
o Vulnerable Products
This vulnerability affects Cisco SD-WAN vManage 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 the following
Cisco products:
Cisco IOS XE SD-WAN Software
Cisco SD-WAN vEdge Series Routers
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 First Fixed Release First Fixed Release for All
SD-WAN for This Vulnerabilities Described in the
Release Vulnerability Collection of Advisories
18.3 and Migrate to a fixed Migrate to a fixed release.
earlier release.
18.4 18.4.6 Migrate to a fixed release.
19.2 19.2.3 Migrate to a fixed release.
20.1 20.1.2 Migrate to a fixed release.
20.3 20.3.1 Migrate to a fixed release.
20.4 20.4.1 Migrate to a fixed release.
20.5 20.5.1 Migrate to a fixed release.
20.6 20.6.1 20.6.1
20.7 20.7.1 20.7.1
The Cisco Product Security Incident Response Team (PSIRT) validates only
the affected and fixed release information that is documented in this
advisory.
Exploitation and Public Announcements
o The Cisco 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 by Andrew Kim
of the Cisco Advanced Security Initiatives Group (ASIG).
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-sdwan-privesc-vman-tEJFpBSL
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-APR-13 |
+----------+---------------------------+----------+--------+--------------+
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