// For flags

CVE-2023-24955

Microsoft SharePoint Server Code Injection Vulnerability

Severity Score

7.2
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

Yes
*KEV

Decision

Act
*SSVC
Descriptions

Microsoft SharePoint Server Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft SharePoint. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.
The specific flaw exists within the GenerateProxyAssembly method. The issue results from the lack of proper validation of a user-supplied string before using it to execute C# code. An attacker can leverage this vulnerability to execute code in the context of SharePoint farm service account.

Microsoft SharePoint Server contains a code injection vulnerability that allows an authenticated attacker with Site Owner privileges to execute code remotely.

*Credits: Nguyễn Tiến Giang (@testanull) of STAR Labs SG Pte. Ltd.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Act
Exploitation
Active
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2023-01-31 CVE Reserved
  • 2023-05-09 CVE Published
  • 2023-12-28 First Exploit
  • 2024-03-26 Exploited in Wild
  • 2024-04-16 KEV Due Date
  • 2024-08-02 CVE Updated
  • 2024-08-10 EPSS Updated
CWE
  • CWE-94: Improper Control of Generation of Code ('Code Injection')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Microsoft
Search vendor "Microsoft"
 Sharepoint Enterprise Server
Search vendor "Microsoft" for product "Sharepoint Enterprise Server"
 2016
Search vendor "Microsoft" for product "Sharepoint Enterprise Server" and version "2016"
-
Affected
Microsoft
Search vendor "Microsoft"
 Sharepoint Server
Search vendor "Microsoft" for product "Sharepoint Server"
-subscription
Affected
Microsoft
Search vendor "Microsoft"
 Sharepoint Server
Search vendor "Microsoft" for product "Sharepoint Server"
 2019
Search vendor "Microsoft" for product "Sharepoint Server" and version "2019"
-
Affected