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AUSCERT External Security Bulletin Redistribution
ESB-2022.0454
Cisco Small Business RV Series Routers Vulnerabilities
3 February 2022
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco RV Series Routers
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20749 CVE-2022-20712 CVE-2022-20711
CVE-2022-20710 CVE-2022-20709 CVE-2022-20708
CVE-2022-20707 CVE-2022-20706 CVE-2022-20705
CVE-2022-20704 CVE-2022-20703 CVE-2022-20702
CVE-2022-20701 CVE-2022-20700 CVE-2022-20699
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6D
Comment: CVSS (Max): 10.0 CVE-2022-20699 (CVSSv3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
CVSS Source: Cisco Systems
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Small Business RV Series Routers Vulnerabilities
Priority: Critical
Advisory ID: cisco-sa-smb-mult-vuln-KA9PK6D
First Published: 2022 February 2 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvz88279 CSCvz94704 CSCwa12732 CSCwa12748 CSCwa12836
CSCwa13115 CSCwa13119 CSCwa13205 CSCwa13682 CSCwa13836
CSCwa13882 CSCwa13888 CSCwa13900 CSCwa14007 CSCwa14008
CSCwa14564 CSCwa14565 CSCwa14601 CSCwa14602 CSCwa15167
CSCwa15168 CSCwa18769 CSCwa18770 CSCwa32432 CSCwa36774
CSCwa54598
CVE Names: CVE-2022-20699 CVE-2022-20700 CVE-2022-20701 CVE-2022-20702
CVE-2022-20703 CVE-2022-20704 CVE-2022-20705 CVE-2022-20706
CVE-2022-20707 CVE-2022-20708 CVE-2022-20709 CVE-2022-20710
CVE-2022-20711 CVE-2022-20712 CVE-2022-20749
CWEs: CWE-121 CWE-269 CWE-285 More...
Summary
o Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and
RV345 Series Routers could allow an attacker to do any of the following:
Execute arbitrary code
Elevate privileges
Execute arbitrary commands
Bypass authentication and authorization protections
Fetch and run unsigned software
Cause denial of service (DoS)
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-smb-mult-vuln-KA9PK6D
Affected Products
o Vulnerable Products
CVE-2022-20700, CVE-2022-20701, CVE-2022-20702, CVE-2022-20703,
CVE-2022-20704, CVE-2022-20705, CVE-2022-20706, CVE-2022-20710, and
CVE-2022-20712 affect the following Cisco products:
RV160 VPN Routers
RV160W Wireless-AC VPN Routers
RV260 VPN Routers
RV260P VPN Routers with PoE
RV260W Wireless-AC VPN Routers
RV340 Dual WAN Gigabit VPN Routers
RV340W Dual WAN Gigabit Wireless-AC VPN Routers
RV345 Dual WAN Gigabit VPN Routers
RV345P Dual WAN Gigabit POE VPN Routers
CVE-2022-20699, CVE-2022-20707, CVE-2022-20708, CVE-2022-20709,
CVE-2022-20711, and CVE-2022-20749 affect only the following Cisco
products:
RV340 Dual WAN Gigabit VPN Routers
RV340W Dual WAN Gigabit Wireless-AC VPN Routers
RV345 Dual WAN Gigabit VPN Routers
RV345P Dual WAN Gigabit POE VPN Routers
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.
Details
o Some of the vulnerabilities are dependent on one another. Exploitation of
one of the vulnerabilities may be required to exploit another
vulnerability.
Details about the vulnerabilities are as follows:
CVE-2022-20699: Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN
Routers SSL VPN Remote Code Execution Vulnerability
A vulnerability in the SSL VPN module 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.
This vulnerability is due to insufficient boundary checks when processing
specific HTTP requests. An attacker could exploit this vulnerability by
sending malicious HTTP requests to the affected device that is acting as an
SSL VPN Gateway. A successful exploit could allow the attacker to execute
code with root privileges on the affected device.
Bug ID(s): CSCwa13836
CVE ID: CVE-2022-20699
Security Impact Rating (SIR): Critical
CVSS Base Score: 10.0
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVE-2022-20700, CVE-2022-20701, CVE-2022-20702: Cisco Small Business RV
Series Routers Privilege Escalation Vulnerabilities
Multiple vulnerabilities in the web-based management interface of Cisco
Small Business RV Series Routers could allow a remote attacker to elevate
privileges to root .
These vulnerabilities are due to insufficient authorization enforcement
mechanisms. An attacker could exploit these vulnerabilities by submitting
specific commands to an affected device. A successful exploit could allow
the attacker to elevate privileges to root and execute arbitrary commands
on the affected system.
Cisco has released software updates that address these vulnerabilities.
There are no workarounds that address this these vulnerabilities.
Bug ID(s): CSCwa14564 , CSCwa14565
CVE ID: CVE-2022-20700
Security Impact Rating (SIR): Critical
CVSS Base Score: 10.0
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Bug ID(s): CSCwa12836 , CSCwa13119
CVE ID: CVE-2022-20701
Security Impact Rating (SIR): Critical
CVSS Base Score: 9.0
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Bug ID(s): CSCwa15167 , CSCwa15168
CVE ID: CVE-2022-20702
Security Impact Rating (SIR): Medium
CVSS Base Score: 6.0
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CVE-2022-20703: Cisco Small Business RV Series Routers Digital Signature
Verification Bypass Vulnerability
A vulnerability in the software image verification feature of Cisco Small
Business RV Series Routers could allow an unauthenticated, local attacker
to install and boot a malicious software image or execute unsigned binaries
on an affected device.
This vulnerability is due to improper verification of software images as
they are installed on an affected device. An attacker could exploit this
vulnerability by loading unsigned software on the device. A successful
exploit could allow the attacker to install and boot a malicious software
image or execute unsigned binaries on the device.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCwa12748 , CSCwa13115
CVE ID: CVE-2022-20703
Security Impact Rating (SIR): Critical
CVSS Base Score: 9.3
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVE-2022-20704: Cisco Small Business RV Series Routers SSL Certificate
Validation Vulnerability
A vulnerability in the software upgrade module of Cisco Small Business RV
Series Routers could allow an unauthenticated, remote attacker to view or
alter information that is shared between an affected device and specific
Cisco servers (cloudsso.cisco.com and api.cisco.com).
This vulnerability is due to improper validation of the SSL server
certificate that is received when establishing a connection to specific
remote servers. An attacker could exploit this vulnerability by using
man-in-the-middle techniques to intercept the traffic between the affected
device and the server, and then using a forged certificate to impersonate
the server. A successful exploit could allow the attacker to force the
affected device to download arbitrary software images and launch further
attacks, combining other vulnerabilities that are described in this
advisory.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCwa13205 , CSCwa13682
CVE ID: CVE-2022-20704
Security Impact Rating (SIR): Medium
CVSS Base Score: 4.8
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVE-2022-20705: Cisco Small Business RV Series Routers Improper Session
Management Vulnerability
A vulnerability in the session management of the web UI of Cisco Small
Business RV Series Routers could allow an unauthenticated, remote attacker
to defeat authentication protections and access the web UI. The attacker
could obtain partial administrative privileges and perform unauthorized
actions.
This vulnerability is due to the use of weak entropy for session identifier
generation functions. An attacker could exploit this vulnerability either
by using brute force to determine a current session identifier and then
reusing the identifier to take over an ongoing session or by crafting a
new, valid session identifier and bypassing the whole authentication
mechanism. A successful exploit could allow the attacker to take actions
within the web UI with privileges up to the level of the administrative
user and launch further attacks, exploiting the other vulnerabilities
described in this advisory.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCwa14601 , CSCwa14602 , CSCwa32432 , CSCwa54598
CVE ID: CVE-2022-20705
Security Impact Rating (SIR): High
CVSS Base Score: 5.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVE-2022-20706: Cisco RV Series Routers Open Plug and Play Command
Injection Vulnerability
A vulnerability in the Open Plug and Play (PnP) module of Cisco Small
Business RV Series Routers could allow an unauthenticated, remote attacker
to inject and execute arbitrary commands on the underlying operating
system.
This vulnerability is due to insufficient validation of user-supplied
input. An attacker could exploit this vulnerability by sending malicious
input to an affected device. A successful exploit could allow the attacker
to execute arbitrary commands on the underlying Linux operating system. To
exploit this vulnerability, an attacker must leverage a man-in-the-middle
position or have an established foothold on a specific network device that
is connected to the vulnerable router.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this this vulnerability.
Bug ID(s): CSCwa14007 , CSCwa14008
CVE ID: CVE-2022-20706
Security Impact Rating (SIR): High
CVSS Base Score: 8.3
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CVE-2022-20707, CVE-2022-20708, CVE-2022-20749: Cisco RV340, RV340W, RV345,
and RV345P Dual WAN Gigabit VPN Routers Command Injection Vulnerabilities
Multiple vulnerabilities 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 inject and
execute arbitrary commands on the underlying operating system.
These vulnerabilities are due to insufficient validation of user-supplied
input. An attacker could exploit these vulnerabilities by sending malicious
input to an affected device. A successful exploit could allow the attacker
to execute arbitrary commands on the underlying Linux operating system.
Cisco has released software updates that address these vulnerabilities.
There are no workarounds that address this these vulnerabilities.
Bug ID(s): CSCwa13900
CVE ID: CVE-2022-20708
Security Impact Rating (SIR): Critical
CVSS Base Score: 10.0
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Bug ID(s): CSCwa12732
CVE ID: CVE-2022-20707
Security Impact Rating (SIR): High
CVSS Base Score: 7.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Bug ID(s): CSCwa36774
CVE ID: CVE-2022-20749
Security Impact Rating (SIR): High
CVSS Base Score: 7.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVE-2022-20709: Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN
Routers Arbitrary File Upload Vulnerability
A vulnerability in the web-based management interface of Cisco RV340,
RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an
unauthenticated, remote attacker to upload arbitrary files to an affected
device.
This vulnerability is due to insufficient authorization enforcement
mechanisms in the context of file uploads. An attacker could exploit this
vulnerability by sending a crafted HTTP request to an affected device. A
successful exploit could allow the attacker to upload arbitrary files to
the affected device.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCwa13882
CVE ID: CVE-2022-20709
Security Impact Rating (SIR): Medium
CVSS Base Score: 5.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVE-2022-20710: Cisco Small Business RV Series Routers GUI Denial of
Service Vulnerability
A vulnerability in the internal interprocess communication of Cisco Small
Business RV Series Routers could allow an unauthenticated, remote attacker
to cause a denial of service (DoS) condition in the login functionality of
the web-based management interface.
This vulnerability is due to erroneously handled exceptions during failed
login attempts. An attacker could exploit this vulnerability by submitting
a crafted HTTP packet to an affected device. A successful exploit could
allow the attacker to prevent users from logging in to the affected device.
Successful exploitation of this vulnerability would not impact users who
are already logged in.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCvz88279 , CSCvz94704
CVE ID: CVE-2022-20710
Security Impact Rating (SIR): Medium
CVSS Base Score: 5.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVE-2022-20711: Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN
Routers Arbitrary File Overwrite Vulnerability
A vulnerability in the web UI of Cisco RV340, RV340W, RV345, and RV345P
Dual WAN Gigabit VPN Routers could allow an unauthenticated, remote
attacker to overwrite certain files on an affected device.
This vulnerability is due to insufficient input validation for specific
components of the web UI. An attacker could exploit this vulnerability by
sending crafted HTTP requests to an affected device. A successful exploit
could allow the attacker to overwrite existing files or exfiltrate
confidential data by tampering with the files that are served by the web UI
process.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCwa13888
CVE ID: CVE-2022-20711
Security Impact Rating (SIR): High
CVSS Base Score: 8.2
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CVE-2022-20712: Cisco Small Business RV Series Routers Upload Module Remote
Code Execution Vulnerability
A vulnerability in the upload module of Cisco Small Business RV Series
Routers could allow an unauthenticated, remote attacker to execute
arbitrary code on an affected device.
This vulnerability is due to insufficient boundary checks when processing
specific HTTP requests. An attacker could exploit this vulnerability by
sending malicious HTTP requests to an affected device. A successful exploit
could allow the attacker to execute code with non- root privileges on the
device.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCwa18769, CSCwa18770
CVE ID: CVE-2022-20712
Security Impact Rating (SIR): High
CVSS Base Score: 7.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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 with service contracts that entitle
them to regular software updates should obtain security fixes through their
usual update channels.
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.
The Cisco Support and Downloads page on Cisco.com provides information
about licensing and downloads. This page can also display customer device
support coverage for customers who use the My Devices tool.
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(s):
Cisco Product Vulnerable Releases First Fixed Release
RV160 and RV260 Series 1.0.01.05 and Release no. TBD (Feb
Routers earlier 2022)
RV340 and RV345 Series 1.0.03.24 1.0.03.26
Routers
The Cisco Product Security Incident Response Team (PSIRT) validates only
the affected and fixed release information that is documented in this
advisory.
Exploitation and Public Announcements
o The Cisco PSIRT is aware that proof-of-concept exploit code is available
for several of the vulnerabilities that are described in this advisory.
Source
o Cisco would like to thank the following individuals and teams who worked
with Trend Micro's Zero Day Initiative for reporting these vulnerabilities:
Benjamin Grap, Hanno Heinrichs, and Lukas Kupczyk of CrowdStrike
Intelligence: CVE-2022-20701, CVE-2022-20705, CVE-2022-20707
Bien Pham (@bienpnn) from Team Orca of Sea Security: CVE-2022-20703,
CVE-2022-20705, CVE-2022-20707
The Flashback Team - Pedro Ribeiro (@pedrib1337) and Radek Domanski
(@RabbitPro): CVE-2022-20699
Gaurav Baruah: CVE-2022-20703, CVE-2022-20704
Jeongun Baek of Diffense: CVE-2022-20702, CVE-2022-20705,
CVE-2022-20707
Stephen Fewer of Relyze Software: CVE-2022-20700, CVE-2022-20705,
CVE-2022-20707, CVE-2022-20712
Q. Kaiser of IoT Inspector Research Lab: CVE-2022-20705,
CVE-2022-20708, CVE-2022-20709, CVE-2022-20711
trichimtrich and nyancat0131: CVE-2022-20706
Corentin BAYET (@OnlyTheDuck) from @Synacktiv: CVE-2022-20705,
CVE-2022-20707
CVE-2022-20705: Cisco would also like to thank dcmtruman for reporting this
vulnerability.
CVE-2022-20749: Cisco would also like to thank dcmtruman and serua for
reporting this vulnerability.
CVE-2022-20710: This vulnerability was found by Mike Steinkoenig of Cisco
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-smb-mult-vuln-KA9PK6D
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-FEB-02 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
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