PT-2021-3900 · Microsoft · Windows

Abdelhamid Naceri + 1 · Published 2021-08-10 · Updated 2024-07-09 · CVE-2021-34484

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows versions prior to the fixed version

Description The issue is related to the Windows User Profile Service and is associated with insufficient access restrictions. It allows an attacker to elevate their privileges. The vulnerability can be exploited if the attacker knows the username and password of another user. There is no information about the estimated number of potentially affected devices worldwide or real-world incidents where this issue was exploited.

Recommendations For Windows versions prior to the fixed version, update to the latest version that includes the security patch for this issue. As a temporary workaround, consider restricting access to the User Profile Service to minimize the risk of exploitation.

Exploit

Fix

Weakness Enumeration

CWE-264

Related Identifiers

BDU:2021-04380

CVE-2021-34484

ZDI-21-966

Affected Products

Windows

References · 23

• 🔥 https://packetstormsecurity.com/files/166692/Windows-User-Profile-Service-Privlege-Escalation.html · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-34484 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34484 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34484 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04380 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-966 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-34484 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34484 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34484 · Vendor Advisory
• https://t.me/cvenotify/19942 · Telegram Post
• https://twitter.com/billdemirkapi/status/1508527492285575172 · Note
• https://t.me/defcon_news/89824 · Telegram Post
• https://t.me/tomhunter/445 · Telegram Post
• https://t.me/cybersecuritytechnologies/4757 · Telegram Post
• https://t.me/true_secator/2760 · Telegram Post