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

Multiple vulnerabilities in Microsoft Power Apps (apps.powerapps.com, make.powerapps.com)

Medium

Synopsis

Insufficient input validation on apps.powerapps.com/teams/makerportal makerportalUrl parameter

The makerPortalUrl parameter at apps.powerapps.com/teams/makerportal did not properly validate the supplied url. 

A malicious attacker could leverage this issue to spoof content in Microsoft Teams tabs and steal victims' authorization tokens. 

Theft of authorization tokens for graph.make.powerapps.com and api.powerapps.com

If a user who is logged into make.powerapps.com was convinced to visit a page following the format:

https://make.powerapps.com/teams/powerapps/acquire/mscrm.test/status/htt...

That user's authorization tokens for graph.make.powerapps.com and api.powerapps.com would be leaked to the attacker-controlled site. 

A malicious attacker could leverage this issue to steal additional authorization tokens and make requests to multiple Microsoft services authorized as the victim. 

Solution

Microsoft has fixed the issues.

Disclosure Timeline

March 26, 2021 - Vulnerabilities reported to Microsoft Security Response Center (MSRC)
March 30, 2021 - Vulnerabilities confirmed by MSRC
April 15, 2021 - Tenable asks for updates, MSRC responds that team is investigating.
April 27, 2021 - Tenable notes that the input validation issue appears fixed, which would trigger disclosure. Asks Microsoft to confirm.
May 10, 2021 - Tenable again asks MSRC to confirm, notes that issue will be disclosed unless there is reason to believe the issue is not fixed.
May 11, 2021 - MSRC asks Tenable to delay disclosure until they can confirm the fix.
May 11, 2021 - Tenable asks MSRC to confirm before end of week if there are additional issues or other reasons to delay disclosure.
May 13, 2021 - Tenable discovers and reports a potential workaround to the noted fix, agrees to delay disclosure until MSRC confirms the issue is fixed and workaround addressed.
June 11, 2021 - MSRC confirms the input validation issue is fixed.
June 24, 2021 - MSRC confirms the auth token disclosure issue is fixed.

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
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.

Tenable.io BUY

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

Choose Your Subscription Option:

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, 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.

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.