Platform
Managed Security Services
Managed Penetration Testing
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Resources
March 22, 2023Severity Medium Analysis Summary Mekotio is a banking trojan that targets users in Latin America and Europe. It is primarily distributed via phishing emails and infected […]March 22, 2023Analysis Summary Overview – 23rd Mar – A Big Day – As we approach the 23rd of March, Pakistan Day, organizations and individuals should be aware […]March 22, 2023Severity High Analysis Summary CVE-2023-28684 CVSS:7.1 Jenkins remote-jobs-view-plugin Plugin could allow a remote authenticated attacker to obtain sensitive information, caused by improper handling of XML external […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Connect with Us
Platform
Managed Security Services
Managed Penetration Testing
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Resources
March 22, 2023Severity Medium Analysis Summary Mekotio is a banking trojan that targets users in Latin America and Europe. It is primarily distributed via phishing emails and infected […]March 22, 2023Analysis Summary Overview – 23rd Mar – A Big Day – As we approach the 23rd of March, Pakistan Day, organizations and individuals should be aware […]March 22, 2023Severity High Analysis Summary CVE-2023-28684 CVSS:7.1 Jenkins remote-jobs-view-plugin Plugin could allow a remote authenticated attacker to obtain sensitive information, caused by improper handling of XML external […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Connect with Us
Rewterz Threat Advisory – Russian Hackers Exploiting Recently Patched VMware Flaw
December 8, 2020Rewterz Threat Alert – Sodinokibi Ransomware – IoCs
December 8, 2020
Severity
High
Analysis Summary
A novel cross-site scripting (XSS) vulnerability at the ‘teams.microsoft.com’ domain could be abused to trigger a remote code execution flaw in the Microsoft Teams desktop application. It has about 115 million daily active users and is widely deployed as part of Microsoft’s Office 365 family of products. Teams is a proprietary business communication platform that provides users with workspace chat, file storage and sharing, app integration, and videoconferencing capabilities. An attacker simply needs to send a specially crafted message to any Teams user or channel to launch a successful exploit that runs silently in the background, without the user noticing anything.
Remote Code Execution has been achieved in desktop applications across all supported platforms (Windows, macOS, Linux). Code execution gives attackers full access to victim devices and company internal networks via those devices. An attacker could abuse the XSS flaw to obtain SSO authorization tokens for Teams or other Microsoft services, or to access confidential conversations and files from the communications service. Moreover, the vulnerability is wormable, allowing a successful attacker to automatically send the exploit payload to other users/channels, also without interaction. The successful exploitation of the bug could potentially give access to private keys and personal data outside Teams, possibly leaking internal network information and allowing adversaries to set up for phishing attacks. Remote code execution can be achieved only if the XSS in teams.microsoft.com (in user ‘mentions’ functionality) is chained with the novel cross-platform exploit for the Teams desktop clients.
Impact
- Remote Code Execution
- Unauthorized Access
- Possible Leakage of Internal Network Information
Affected Vendors
Microsoft
Affected Products
- Microsoft Teams for macOS v 1.3.00.23764
- Microsoft Teams for Windows v 1.3.00.21759
- Microsoft Teams for Linux v 1.3.00.16851
Remediation
The company has already addressed the vulnerability. Vulnerabilities in Microsoft Teams are fixed via automatic updates.