PT-2021-3139 · Microsoft · Sharepoint Server+1

Adam Willard · Published 2021-05-11 · Updated 2023-08-02 · CVE-2021-26418

Positive Technologies (AI Summary)

CVSS v2.0

6.4

Medium

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions Microsoft SharePoint Server (affected versions not specified) Microsoft SharePoint Foundation (affected versions not specified) Microsoft SharePoint Enterprise Server (affected versions not specified)

Description The issue is related to errors in the user interface's representation of information. It may allow a remote attacker to conduct spoofing attacks, potentially affecting the system.

Recommendations For Microsoft SharePoint Server, consider restricting access to vulnerable components until a fix is available. For Microsoft SharePoint Foundation, restrict access to vulnerable modules to minimize the risk of exploitation. For Microsoft SharePoint Enterprise Server, avoid using vulnerable parameters in affected API endpoints until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Spoofing

Authentication Bypass by Spoofing

UI Misrepresentation of Critical Information

Weakness Enumeration

CWE-290

CWE-451

Related Identifiers

BDU:2021-02780

CVE-2021-26418

Affected Products

Sharepoint Server

Sharepoint Foundation

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2021-26418 · Security Note
• https://bdu.fstec.ru/vul/2021-02780 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26418 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-26418 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26418 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26418 · Security Note
• https://t.me/cvenotify/14596 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021051111 · Note
• https://t.me/cvenotify/14594 · Telegram Post