PT-2021-3299 · Microsoft · Sharepoint Server+1

Alex Birnberg · Published 2021-06-08 · Updated 2023-08-01 · CVE-2021-31950

Positive Technologies (AI Summary)

CVSS v3.1

7.6

High

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Name of the Vulnerable Software and Affected Versions Microsoft SharePoint Server versions prior to 16.0.10372.20060

Description The issue is related to insufficient input validation in Microsoft SharePoint Server, allowing a remote attacker to perform spoofing attacks using a specially crafted request. This can be exploited through the GetXmlDataFromDataSource function, leading to a Server-Side Request Forgery (SSRF) vulnerability.

Recommendations For Microsoft SharePoint Server version 16.0.10372.20060 and earlier, update to a version that includes the fix for this issue. As a temporary workaround, consider restricting access to the GetXmlDataFromDataSource function to minimize the risk of exploitation.

Exploit

Fix

Spoofing

RCE

SSRF

Weakness Enumeration

CWE-20

CWE-918

Related Identifiers

BDU:2021-03073

CVE-2021-31950

Affected Products

Sharepoint Server

Sharepoint Foundation

References · 16

• 🔥 http://packetstormsecurity.com/files/163080/Microsoft-SharePoint-Server-16.0.10372.20060-Server-Side-Request-Forgery.html · Exploit
• 🔥 https://exploit-db.com/exploits/49982 · Exploit
• https://bdu.fstec.ru/vul/2021-03073 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31950 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31950 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31950 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-31950 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31950 · Security Note
• https://t.me/cvenotify/15897 · Telegram Post
• https://t.me/cvenotify/15902 · Telegram Post
• https://t.me/cvenotify/15920 · Telegram Post
• https://t.me/cvenotify/15904 · Telegram Post
• https://t.me/cvenotify/16339 · Telegram Post
• https://t.me/ckure/8364 · Telegram Post
• https://t.me/cybersecuritytechnologies/3610 · Telegram Post