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AUSCERT External Security Bulletin Redistribution
ESB-2019.4185
Multiple vulnerabilities have been identified in Cisco Small
Business RV016, RV042, RV042G, and RV082 Routers
7 November 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Small Business RV016, RV042, RV042G, and RV082 Routers
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-15957
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-sbr-cominj
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-rv32x
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-sbr-cominj
Comment: This bulletin contains three (3) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Small Business Routers RV016, RV042, RV042G, RV082, RV320, and RV325
Command Injection Vulnerability
Priority: High
Advisory ID: cisco-sa-20191106-sbr-cominj
First Published: 2019 November 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvq76768CSCvr39939
CVE-2019-15957
CWE-20
CVSS Score:
7.2 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the web-based management interface of certain Cisco
Small Business RV Series Routers could allow an authenticated, remote
attacker with administrative privileges to inject arbitrary commands into
the underlying operating system. When processed, the commands will be
executed with root privileges.
The vulnerability is due to insufficient validation of user-supplied input.
An attacker could exploit this vulnerability by providing malicious input
to a specific field in the web-based management interface of an affected
device. A successful exploit could allow the attacker to execute arbitrary
commands on the underlying Linux operating system as 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-20191106-sbr-cominj
Affected Products
o Vulnerable Products
The following Cisco Small Business RV Series Routers are vulnerable if they
are running a firmware release earlier than 4.2.3.10:
RV016 Multi-WAN VPN Router ^ 1
RV042 Dual WAN VPN Router
RV042G Dual Gigabit WAN VPN Router
RV082 Dual WAN VPN Router ^ 1
1. The Cisco RV016 Multi-WAN VPN Router and RV082 Dual WAN VPN Router have
reached the end of software maintenance.
The Cisco RV320 and RV325 Dual Gigabit WAN VPN Routers are vulnerable if
they are running a firmware release earlier than 1.5.1.05.
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.
However, administrators can reduce the attack surface by disabling the
Remote Management feature if there is no operational requirement to use it.
Note that the feature is disabled by default.
Administrators can disable the Remote Management feature by choosing
Firewall > General and unchecking the Remote Management check box.
Disabling the feature will disable the web-based management interface on
the WAN IP address, which is reachable through the WAN ports. The interface
will still be available on the LAN IP address, which is reachable through
the LAN ports.
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
Cisco fixed this vulnerability in the Cisco RV042 Dual WAN VPN Router and
RV042G Dual Gigabit WAN VPN Router firmware releases 4.2.3.10 and later.
Cisco fixed this vulnerability in the Cisco RV320 and RV325 Dual Gigabit
WAN VPN Routers firmware releases 1.5.1.05 and later.
Customers can download the software from the Software Center on Cisco.com
by doing the following:
Click Browse all.
Choose Routers > Small Business Routers > Small Business RV Series
Routers.
Choose a specific product from the right pane of the product selector.
Click Small Business Router Firmware .
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 internal security testing.
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-20191106-sbr-cominj
Revision History
o +---------+-------------------------+---------+--------+------------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+---------+--------+------------------+
| 1.0 | Initial public release. | - | Final | 2019-November-06 |
+---------+-------------------------+---------+--------+------------------+
- ---
Cisco Small Business RV320 and RV325 Dual Gigabit WAN Routers Issues
Priority: Informational
Advisory ID: cisco-sa-20191106-rv32x
First Published: 2019 November 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvq34465CSCvq34469CSCvq34472
CWE-798
Summary
o Cisco firmware for Cisco RV320 and RV325 Dual Gigabit WAN VPN Routers is
affected by the following issues:
Static certificates and keys
Hardcoded password hashes
Multiple vulnerabilities in third-party software (TPS) components
Static Certificates and Keys
Two static X.509 certificates with the corresponding public/private key
pairs and one static Secure Shell (SSH) host key were found in the firmware
for Cisco RV320 and RV325 Dual Gigabit WAN VPN Routers. One X.509
certificate was created by the OpenSSL Group for testing purposes and the
second certificate is a test certificate created by Cisco.
The X.509 certificates and keys in question are part of the firmware for
Cisco RV320 and RV325 Dual Gigabit WAN VPN Routers and were used for their
intended testing purpose during the development of that firmware They were
never used for live functionality in any shipping version of the product.
All shipping versions of this firmware use dynamically created certificates
instead.
Cisco bug ID: CSCvq34465
The static SSH host key is part of the tail-f (now part of Cisco) Netconf
ConfD package that is included in the firmware for Cisco RV320 and RV325
Dual Gigabit WAN VPN Routers. It was never used for live functionality in
any shipping version of the product. Key-based SSH authentication is not
supported in any shipping version of this firmware.
Cisco bug ID: CSCvq34469
The inclusion of these certificates and keys in shipping software was an
oversight by the development team for these routers.
Hardcoded Password Hashes
The /etc/shadow file included in the firmware for Cisco RV320 and RV325
Dual Gigabit WAN VPN Routers has a hardcoded password hash for the root
user.
The /etc/shadow file is not consulted during user authentication by the
firmware. Instead, a dedicated alternate user database is used to
authenticate users who log in to either the CLI or the web-based management
interface of the affected routers.
An attacker with access to the base operating system on an affected device
could exploit this issue to obtain root -level privileges. However, Cisco
is not currently aware of a way to access the base operating system on
these routers.
Cisco bug ID: CSCvq34472
Multiple Vulnerabilities in Third-Party Software Components
Third-party software (TPS) components in the firmware for Cisco RV320 and
RV325 Dual Gigabit WAN VPN Routers contain vulnerabilities. Cisco will
handle these vulnerabilities by using the regular Cisco process for TPS
vulnerabilities in accordance with the Cisco Security Vulnerability Policy
. For information about known TPS vulnerabilities that affect the firmware
for these routers, consult the Cisco Bug Search Tool .
Affected Products
o These issues affect Cisco RV320 and RV325 Dual Gigabit WAN VPN Routers when
they are running a firmware release earlier than 1.5.1.05.
Products Confirmed Not Affected
Only products listed in the Affected Products section of this advisory are
known to be affected by these issues.
Updated Firmware
Cisco removed the static certificates and keys and the hardcoded user
account in firmware releases 1.5.1.05 and later for the Cisco RV320 and
RV325 Dual Gigabit WAN VPN Routers.
Customers can download the firmware from the Software Center on Cisco.com
by doing the following:
1. Click Browse all .
2. Choose Routers > Small Business Routers > Small Business RV Series
Routers .
3. Choose a specific product from the right pane of the product selector.
4. Click Small Business Router Firmware .
Source
o Cisco would like to thank security researchers Stefan Viehbock and Thomas
Weber of SEC Consult/IoT Inspector for reporting these issues.
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-20191106-rv32x
Revision History
o +---------+-------------------------+---------+--------+------------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+---------+--------+------------------+
| 1.0 | Initial public release. | - | Final | 2019-November-06 |
+---------+-------------------------+---------+--------+------------------+
- ---
Cisco Small Business Routers RV016, RV042, RV042G, RV082, RV320, and RV325
Command Injection Vulnerability
Priority: High
Advisory ID: cisco-sa-20191106-sbr-cominj
First Published: 2019 November 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvq76768CSCvr39939
CVE-2019-15957
CWE-20
CVSS Score:
7.2 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the web-based management interface of certain Cisco
Small Business RV Series Routers could allow an authenticated, remote
attacker with administrative privileges to inject arbitrary commands into
the underlying operating system. When processed, the commands will be
executed with root privileges.
The vulnerability is due to insufficient validation of user-supplied input.
An attacker could exploit this vulnerability by providing malicious input
to a specific field in the web-based management interface of an affected
device. A successful exploit could allow the attacker to execute arbitrary
commands on the underlying Linux operating system as 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-20191106-sbr-cominj
Affected Products
o Vulnerable Products
The following Cisco Small Business RV Series Routers are vulnerable if they
are running a firmware release earlier than 4.2.3.10:
RV016 Multi-WAN VPN Router ^ 1
RV042 Dual WAN VPN Router
RV042G Dual Gigabit WAN VPN Router
RV082 Dual WAN VPN Router ^ 1
1. The Cisco RV016 Multi-WAN VPN Router and RV082 Dual WAN VPN Router have
reached the end of software maintenance.
The Cisco RV320 and RV325 Dual Gigabit WAN VPN Routers are vulnerable if
they are running a firmware release earlier than 1.5.1.05.
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.
However, administrators can reduce the attack surface by disabling the
Remote Management feature if there is no operational requirement to use it.
Note that the feature is disabled by default.
Administrators can disable the Remote Management feature by choosing
Firewall > General and unchecking the Remote Management check box.
Disabling the feature will disable the web-based management interface on
the WAN IP address, which is reachable through the WAN ports. The interface
will still be available on the LAN IP address, which is reachable through
the LAN ports.
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
Cisco fixed this vulnerability in the Cisco RV042 Dual WAN VPN Router and
RV042G Dual Gigabit WAN VPN Router firmware releases 4.2.3.10 and later.
Cisco fixed this vulnerability in the Cisco RV320 and RV325 Dual Gigabit
WAN VPN Routers firmware releases 1.5.1.05 and later.
Customers can download the software from the Software Center on Cisco.com
by doing the following:
Click Browse all.
Choose Routers > Small Business Routers > Small Business RV Series
Routers.
Choose a specific product from the right pane of the product selector.
Click Small Business Router Firmware .
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 internal security testing.
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-20191106-sbr-cominj
Revision History
o +---------+-------------------------+---------+--------+------------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+---------+--------+------------------+
| 1.0 | Initial public release. | - | Final | 2019-November-06 |
+---------+-------------------------+---------+--------+------------------+
- --------------------------END INCLUDED TEXT--------------------
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