Operating System:

[Cisco]

Published:

05 August 2021

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.2626
        Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN
                  Routers Web Management Vulnerabilities
                               5 August 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco RV340
                   Cisco RV340W
                   Cisco RV345
                   Cisco RV345P
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Root Compromise                 -- Existing Account      
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-1610 CVE-2021-1609 

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv340-cmdinj-rcedos-pY8J3qfy

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Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Web
Management Vulnerabilities

Priority:        Critical
Advisory ID:     cisco-sa-rv340-cmdinj-rcedos-pY8J3qfy
First Published: 2021 August 4 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvy15286 CSCvy15342
CVE Names:       CVE-2021-1609 CVE-2021-1610
CWEs:            CWE-121 CWE-149

Summary

  o Multiple vulnerabilities in the web-based management interface of the Cisco
    Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN
    Routers could allow an attacker to do the following:

       Execute arbitrary code
       Cause a denial of service (DoS) condition
       Execute arbitrary commands

    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-rv340-cmdinj-rcedos-pY8J3qfy

Affected Products

  o Vulnerable Products

    These vulnerabilities affect the following Cisco Small Business Routers if
    they are running a firmware release earlier than Release 1.0.03.22:

       RV340 Dual WAN Gigabit VPN Router
       RV340W Dual WAN Gigabit Wireless-AC VPN Router
       RV345 Dual WAN Gigabit VPN Router
       RV345P Dual WAN Gigabit POE VPN Router

    The web-based management interface for these devices is available through
    local LAN connections by default and cannot be disabled there. The
    interface can also be made available through the WAN interface by enabling
    the remote management feature. By default, the remote management feature is
    disabled on affected devices.

    To determine whether the remote management feature is enabled for a device,
    open the web-based management interface through a local LAN connection and
    choose Basic Settings > Remote Management . If the Enable check box is
    checked, remote management is enabled for the device.

    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:

       RV160 VPN Router
       RV160W Wireless-AC VPN Router
       RV260 VPN Router
       RV260P VPN Router with PoE
       RV260W Wireless-AC VPN Router

Details

  o These vulnerabilities are not dependent on one another. Exploitation of one
    of the vulnerabilities is not required to exploit the other vulnerability.
    In addition, a software release that is affected by one of the
    vulnerabilities may not be affected by the other vulnerability.

    Details about the vulnerabilities are as follows:

    CVE-2021-1609: Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN
    Routers Web Management Remote Code Execution and Denial of Service
    Vulnerability

    A vulnerability in the web-based management interface of Cisco Small
    Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers
    could allow an unauthenticated, remote attacker to execute arbitrary code
    on an affected device or cause the device to reload, resulting in a denial
    of service (DoS) condition.

    This vulnerability exists because HTTP requests are not properly validated.
    An attacker could exploit this vulnerability by sending a crafted HTTP
    request to an affected device. A successful exploit could allow the
    attacker to remotely execute arbitrary code on the device or cause the
    device to reload, resulting in a DoS condition.

    Cisco has released software updates that address this vulnerability. There
    are no workarounds that address this vulnerability.

    Bug ID(s): CSCvy15286
    CVE ID:CVE-2021-1609
    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-2021-1610: Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN
    Routers Web Management Command Injection Vulnerability

    A vulnerability in the web-based management interface of Cisco Small
    Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers
    could allow an authenticated, remote attacker to execute arbitrary commands
    with root privileges on an affected device.

    This vulnerability exists because HTTP requests are not properly validated.
    An attacker could exploit this vulnerability by sending a crafted HTTP
    request to an affected device. A successful exploit could allow the
    attacker to execute arbitrary commands as root 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): CSCvy15342
    CVE ID:CVE-2021-1610
    Security Impact Rating (SIR): High
    CVSS Base Score: 7.2
    CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/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

    Cisco fixed these vulnerabilities in firmware releases 1.0.03.22 and later.

    To download the software from the Software Center on Cisco.com, click
    Browse All and navigate to Downloads Home > Routers > Small Business
    Routers > Small Business RV Series Routers .

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 Cisco would like to thank swing of Chaitin Security Research Lab for
    reporting these vulnerabilities.

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-rv340-cmdinj-rcedos-pY8J3qfy

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    +----------+---------------------------+----------+--------+--------------+
    | 1.0      | Initial public release.   | -        | Final  | 2021-AUG-04  |
    +----------+---------------------------+----------+--------+--------------+

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