Advisory Details

November 21st, 2022

(Pwn2Own) Microsoft Teams chat Client-Side Template Injection Remote Code Execution Vulnerability

CVE ID
CVSS SCORE	6.3, AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Teams
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Teams. No user interaction is required if the attacker and target are in the same Teams organization. The specific flaw exists within the rendering of chat messages. Crafted data in a chat message can trigger execution of JavaScript composed from a user-supplied string. An attacker can leverage this vulnerability to execute code in the context of the current process at low integrity.
ADDITIONAL DETAILS	Fixed on August 31, 2022 https://msrc.microsoft.com/update-guide/acknowledgement/online
DISCLOSURE TIMELINE	2022-05-25 - Vulnerability reported to vendor 2022-11-21 - Coordinated public release of advisory
CREDIT	Masato Kinugawa

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