Microsoft SharePoint AdRotator Improper Input Validation NTLM Relay Vulnerability
May 10th, 2023
Vulnerability Details
This vulnerability allows remote attackers to relay NTLM credentials on affected installations of Microsoft SharePoint. Authentication is required to exploit this vulnerability.
The specific flaw exists within the implementation of the AdRotator WebControl. The issue results from the lack of proper input validation. An attacker can leverage this vulnerability to relay NTLM credentials of the service account.
Additional Details
Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24950
Disclosure Timeline
- 2023-02-10 - Vulnerability reported to vendor
- 2023-05-10 - Coordinated public release of advisory
Credit
Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative
