PT-2021-4152 · Microsoft · Windows

Jeongoh Kyea + 1 · Published 2021-07-13 · Updated 2023-12-28 · CVE-2021-31961

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows (affected versions not specified)

Description The issue is related to an elevation of privilege vulnerability in the Windows InstallService, which is caused by insecure privilege management. This vulnerability can be exploited to allow an attacker to elevate their privileges. The vulnerability may also be related to a Time-Of-Check Time-Of-Use (TOCTOU) denial-of-service issue.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

BDU:2021-04747

CVE-2021-31961

ZDI-21-818

Affected Products

Windows

References · 8

• https://osv.dev/vulnerability/CVE-2021-31961 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-31961 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-818 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31961 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-31961 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31961 · Security Note
• https://bdu.fstec.ru/vul/2021-04747 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31961 · Vendor Advisory