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AUSCERT External Security Bulletin Redistribution
ESB-2021.0950
Cisco Small Business RV132W and RV134W Routers Remote
Command Execution and Denial of Service Vulnerability
18 March 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: RV132W ADSL2+ Wireless-N VPN Routers
RV134W VDSL2 Wireless-AC VPN Routers
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1287
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-132w134w-overflow-Pptt4H2p
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Small Business RV132W and RV134W Routers Management Interface Remote
Command Execution and Denial of Service Vulnerability
Priority: High
Advisory ID: cisco-sa-rv-132w134w-overflow-Pptt4H2p
First Published: 2021 March 17 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvw65031 CSCvw65032
CVE Names: CVE-2021-1287
CWEs: CWE-121
Summary
o A vulnerability in the web-based management interface of Cisco RV132W
ADSL2+ Wireless-N VPN Routers and Cisco RV134W VDSL2 Wireless-AC VPN
Routers could allow an authenticated, remote attacker to execute arbitrary
code on an affected device or cause the device to restart unexpectedly.
The vulnerability exists because the web-based management interface does
not properly validate user-supplied input. An attacker could exploit this
vulnerability by sending crafted HTTP requests to an affected device. A
successful exploit could allow the attacker to execute arbitrary code as
the root user on the underlying operating system or cause the device to
reload, resulting in a denial of service (DoS) condition on the affected
device.
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-rv-132w134w-overflow-Pptt4H2p
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco devices:
RV132W ADSL2+ Wireless-N VPN Routers if they are running a firmware
release earlier than Release 1.0.1.15
RV134W VDSL2 Wireless-AC VPN Routers if they are running a firmware
release earlier than Release 1.0.1.21
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
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 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 the following Cisco products:
RV132W ADSL2+ Wireless-N VPN Routers firmware releases 1.0.1.15 and
later
RV134W VDSL2 Wireless-AC VPN Routers firmware releases 1.0.1.21 and
later
To download the firmware updates from the Software Center on Cisco.com,
click Browse all, choose Routers > Small Business Routers > Small Business
RV Series Routers , and then choose the correct router model.
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 Shizhi He of Wuhan University 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-rv-132w134w-overflow-Pptt4H2p
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-MAR-17 |
+----------+---------------------------+----------+--------+--------------+
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