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

[R2] Check_MK Multisite Web UI Stored and Reflected XSS

Medium
← View More Research Advisories

Synopsis

An internal server error can be triggered on the Check_MK Multisite web interface by providing an unexpected format to the output_format parameter. The internal server error page will then display output from the Apache error log. A remote unauthenticated attacker can introduce both reflected and stored HTML/Javascript to the error log using the output_format parameter or by the username in a failed HTTP basic authentication login attempt.

For example, visiting the following URL on an affected target will create a popup box. The target will also persist the code in the Apache error log so that the next user to view the internal server error page will also see the popup.

http://[target]/[sitename]/check_mk/login.py?output_format=<script>alert(%27Tenable%27)</script>

Solution

The vendor has released Check_MK versions 1.2.8p25 and 1.4.0p9 to address this issue.

Additional References

http://mathias-kettner.com/check_mk_werks.php?werk_id=7661

Disclosure Timeline

2017-06-28 - Issue discovered
2017-07-04 - Disclosed to security at check-mk.org
2017-07-06 - Team at Check_MK confirm vulnerability, introduce fix for next release.
2017-07-24 - Fixed release 1.4.0p9 added to check-mk.org
2017-07-25 - Fixed release 1.2.8p25 added to check-mk.org
2017-08-16 - CVE requested / received

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]

Risk Information

CVE ID: CVE-2017-11507
Tenable Advisory ID: TRA-2017-20
Credit:
Evan Grant, Tenable Network Security
CVSSv2 Base / Temporal Score:
4.3 / 3.4
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C
Affected Products:
Check_MK 1.2.8, 1.4.0
Risk Factor:
Medium

Advisory Timeline

2017-11-02 - [R1] Initial Release
2017-11-02 - [R2] Added Risk Factor
Try for free Buy now

Tenable Vulnerability Management

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.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

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.

100 assets

Choose your subscription option:

Buy Now
Try for free Buy now

Tenable Vulnerability Management

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.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

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.

100 assets

Choose your subscription option:

Buy Now
Try for free Buy now

Tenable Vulnerability Management

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.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

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.

100 assets

Choose your subscription option:

Buy Now
Try for free Buy now

Try Tenable Web App Scanning

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable One Exposure Management 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.

Your Tenable Web App Scanning trial also includes Tenable Vulnerability Management and Tenable Lumin.

Buy Tenable Web App 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 Lumin

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

Your Tenable Lumin trial also includes Tenable Vulnerability Management and Tenable Web App Scanning.

Buy Tenable Lumin

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

Request a demo of Tenable Security Center

Please fill out this form with your contact information.

A sales representative will contact you shortly to schedule a demo.

* Field is required

Request a demo of Tenable OT Security

Get the Operational Technology security you need.

Reduce the risk you don’t.

Request a demo of Tenable Identity Exposure

Continuously detect and respond to Active Directory attacks. No agents. No privileges.

On-prem and in the cloud.

Request a demo of Tenable Cloud Security

Exceptional unified cloud security awaits you!

We’ll show you exactly how Tenable Cloud Security helps you deliver multi-cloud asset discovery, prioritized risk assessments and automated compliance/audit reports.

See
Tenable One
in action

Exposure management for the modern attack surface.

See Tenable Attack Surface Management in action

Know the exposure of every asset on any platform.

Get a demo of Tenable Enclave Security

Please fill out the form with your contact information and a sales representative will contact you shortly to schedule a demo.

Try for free Buy now

Try Tenable Nessus Professional free

Free for 7 days

Tenable Nessus is the most comprehensive vulnerability scanner on the market today.

NEW - Tenable Nessus Expert
now available

Nessus Expert adds even more features, including external attack surface scanning, and the ability to add domains and scan cloud infrastructure. Click here to Try Nessus Expert.

Fill out the form below to continue with a Nessus Pro trial.

Buy Tenable Nessus Professional

Tenable Nessus is the most comprehensive vulnerability scanner on the market today. Tenable 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, community and chat support 24 hours a day, 365 days a year.

Select your license

Buy a multi-year license and save.

Add support and training
Buy Now
Renew an existing license Find a reseller
Try for free Buy now

Try Tenable Nessus Expert free

Free for 7 days.

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Already have Tenable Nessus Professional?
Upgrade to Nessus Expert free for 7 days.

Buy Tenable Nessus Expert

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Select your license

Buy a multi-year license and save more.

Add support and training
Buy Now
Renew an existing license Find a reseller

Get a demo of Tenable Patch Management

Interested in streamlining security and IT collaboration and shortening the mean time to remediate with automation? Try Tenable Patch Management.