PT-2020-2268 · Microsoft+1 · Windows+1

Published 2020-04-14 · Updated 2021-07-21 · CVE-2020-0981

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/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 incorrect neutralization of special elements in output used by an incoming component, specifically the NtFilterToken ParentTokenId in Microsoft Windows. This could allow an attacker to elevate their privileges. The vulnerability exists when Windows fails to properly handle token relationships, potentially leading to a sandbox escape. An application with a certain integrity level could execute code at a different integrity level. The vulnerability can be exploited to escape the Chrome sandbox in Windows by utilizing the Windows access token management mechanism.

Recommendations For Windows versions prior to the fixed version, update to the latest version that includes the security patch to address the vulnerability by correcting how Windows handles token relationships. As a temporary workaround, consider restricting access to sensitive components and modules to minimize the risk of exploitation until a patch is available.

Fix

Incorrect Authorization

Special Elements Injection

Weakness Enumeration

CWE-863

CWE-74

Related Identifiers

BDU:2020-02210

CVE-2020-0981

Affected Products

Google Chrome

Windows

References · 6

• https://osv.dev/vulnerability/CVE-2020-0981 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0981 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-02210 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-0981 · Security Note
• http://packetstormsecurity.com/files/157248/Microsoft-Windows-NtFilterToken-ParentTokenId-Incorrect-Setting-Privilege-Escalation.html · Note
• https://t.me/sysadm_in_channel/1761 · Telegram Post