SSRF in Microsoft SharePoint Server

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU74976

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2023-28288

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote user to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input within the WSSXmlUrlResolver class. A remote user can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Foundation: 2013 Service Pack 1

Microsoft SharePoint Server Subscription Edition: All versions

Microsoft SharePoint Server: 2019

Microsoft SharePoint Enterprise Server: 2013 Service Pack 1 - 2016

CPE2.3

• cpe:2.3:a:microsoft:microsoft_sharepoint_foundation:2013 Service Pack 1:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_sharepoint_server_subscription_edition:*:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_sharepoint_server:2019:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_sharepoint_enterprise_server:2013:Service Pack 1:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_sharepoint_enterprise_server:2016:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-28288
http://www.zerodayinitiative.com/advisories/ZDI-23-382/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.