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AUSCERT External Security Bulletin Redistribution
ESB-2020.2601
Cisco SD-WAN vManage Software Authorization Bypass Vulnerability
30 July 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco SD-WAN vManage Software
Publisher: Cisco Systems
Operating System: Network Appliance
Impact/Access: Increased Privileges -- Existing Account
Modify Arbitrary Files -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3374
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uabvman-SYGzt8Bv
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco SD-WAN vManage Software Authorization Bypass Vulnerability
Priority: Critical
Advisory ID: cisco-sa-uabvman-SYGzt8Bv
First Published: 2020 July 29 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvs39776
CVE-2020-3374
CWE-285
CVSS Score:
9.9 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the web-based management interface of Cisco SD-WAN
vManage Software could allow an authenticated, remote attacker to bypass
authorization, enabling them to access sensitive information, modify the
system configuration, or impact the availability of the affected system.
The vulnerability is due to insufficient authorization checking on the
affected system. An attacker could exploit this vulnerability by sending
crafted HTTP requests to the web-based management interface of an affected
system. A successful exploit could allow the attacker to gain privileges
beyond what would normally be authorized for their configured user
authorization level. The attacker may be able to access sensitive
information, modify the system configuration, or impact the availability 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-uabvman-SYGzt8Bv
Affected Products
o Vulnerable Products
This vulnerability affects 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 this vulnerability.
Cisco has confirmed that this vulnerability does not affect the following
Cisco products:
IOS XE SD-WAN Software
SD-WAN vBond Orchestrator Software
SD-WAN vEdge Routers
SD-WAN vSmart Controller Software
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 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 and Alerts 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(s):
+------------------------------------------+------------------------------+
|Cisco SD-WAN vManage Software Release |First Fixed Release |
+------------------------------------------+------------------------------+
|Earlier than 18.3 |Migrate to a fixed release. |
+------------------------------------------+------------------------------+
|18.3 |Migrate to a fixed release. |
+------------------------------------------+------------------------------+
|18.4 |18.4.5 |
+------------------------------------------+------------------------------+
|19.2 |19.2.2 |
+------------------------------------------+------------------------------+
|19.3 |Migrate to a fixed release. |
+------------------------------------------+------------------------------+
|20.1 |20.1.1 |
+------------------------------------------+------------------------------+
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 This vulnerability was found during the resolution of a Cisco TAC support
case.
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-uabvman-SYGzt8Bv
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-JUL-29 |
+----------+---------------------------+----------+--------+--------------+
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