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AUSCERT External Security Bulletin Redistribution
ESB-2021.1163
Cisco SD-WAN vManage Software Vulnerabilities
8 April 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco SD-WAN vManage Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1480 CVE-2021-1479 CVE-2021-1137
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-YuTVWqy
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco SD-WAN vManage Software Vulnerabilities
Priority: Critical
Advisory ID: cisco-sa-vmanage-YuTVWqy
First Published: 2021 April 7 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvs98509 CSCvv87918 CSCvw08533 CSCvw31395
CVE Names: CVE-2021-1137 CVE-2021-1479 CVE-2021-1480
CWEs: CWE-119 CWE-250 CWE-269
Summary
o Multiple vulnerabilities in Cisco SD-WAN vManage Software could allow an
unauthenticated, remote attacker to execute arbitrary code or allow an
authenticated, local attacker to gain escalated privileges on an affected
system.
For more information about these vulnerabilities, see the Details section
of this advisory.
Cisco has released software updates that address these vulnerabilities.
There are no workarounds that address these vulnerabilities.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-YuTVWqy
Affected Products
o Vulnerable Products
These vulnerabilities affect Cisco devices if they are running a vulnerable
release of 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 these vulnerabilities.
Cisco has confirmed that these vulnerabilities do not affect the following
Cisco products:
IOS XE SD-WAN Software
SD-WAN cEdge Routers
SD-WAN vBond Orchestrator Software
SD-WAN vEdge Routers
SD-WAN vSmart Controller Software
Details
o The vulnerabilities are not dependent on one another. Exploitation of one
of the vulnerabilities is not required to exploit another vulnerability. In
addition, a software release that is affected by one of the vulnerabilities
may not be affected by the other vulnerabilities.
Details about the vulnerabilities are as follows:
CVE-2021-1479: Cisco SD-WAN vManage Remote Management Buffer Overflow
Vulnerability
A vulnerability in a remote management component of Cisco SD-WAN vManage
Software could allow an unauthenticated, remote attacker to cause a buffer
overflow condition.
The vulnerability is due to improper validation of user-supplied input to
the vulnerable component. An attacker could exploit this vulnerability by
sending a crafted connection request to the vulnerable component that, when
processed, could cause a buffer overflow condition. A successful exploit
could allow the attacker to execute arbitrary code on the underlying
operating system with root privileges.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCvv87918
CVE ID: CVE-2021-1479
Security Impact Rating (SIR): Critical
CVSS Base Score: 9.8
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2021-1137: Cisco SD-WAN vManage Privilege Escalation Vulnerability
A vulnerability in the user management function of Cisco SD-WAN Software
could allow an authenticated, local attacker to gain escalated privileges
on the underlying operating system.
The vulnerability is due to insufficient input validation by the affected
software. An authenticated attacker who has permissions to add new users or
groups on the vManage system could exploit this vulnerability by modifying
a user account. A successful exploit could allow the attacker to gain root
privileges on the underlying operating system.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCvw08533
CVE ID: CVE-2021-1137
Security Impact Rating (SIR): High
CVSS Base Score: 7.8
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-1480: Cisco SD-WAN vManage Privilege Escalation Vulnerability
A vulnerability in system file transfer functions of Cisco SD-WAN Software
could allow an authenticated, local attacker to gain escalated privileges
on the underlying operating system.
The vulnerability is due to improper validation of input to the system file
transfer functions. An authenticated attacker could exploit this
vulnerability by sending specially crafted requests to the vulnerable
system. A successful exploit could allow the attacker to overwrite
arbitrary files and modify the system in such a way that could allow the
attacker to gain root privileges on the underlying operating system.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCvw31395 and CSCvs98509
CVE ID: CVE-2021-1480
Security Impact Rating (SIR): High
CVSS Base Score: 7.8
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Workarounds
o There are no workarounds that address these vulnerabilities.
Fixed Software
o Cisco has released free software updates that address the vulnerabilities
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
Customers are advised to upgrade to an appropriate fixed software release
as indicated in the following table.
Cisco SD-WAN First Fixed First Fixed Release for all
vManage Release Release Vulnerabilities in this Advisory
18.4 and earlier Migrate to a Migrate to a fixed release.
fixed release.
19.2 19.2.4 19.2.4
19.3 Migrate to a Migrate to a fixed release.
fixed release.
20.1 Migrate to a Migrate to a fixed release.
fixed release.
20.3 20.3.3 20.3.3
20.4 20.4.1 20.4.1
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 vulnerabilities that are
described in this advisory.
Source
o Vulnerability CVE-2021-1479 was found during internal security testing.
Cisco would like to thank Jakub Olszak and Stefan Zaryn for reporting the
vulnerability CVE-2021-1137.
Vulnerability CVE-2021-1480 was found during the resolution of a Cisco TAC
support case. Cisco would also like to thank XMCO for independently
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-vmanage-YuTVWqy
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-APR-07 |
+----------+---------------------------+----------+--------+--------------+
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