PT-2020-4337 · Microsoft · Windows

Donato Ferrante · Published 2020-10-13 · Updated 2023-12-31 · CVE-2020-16877

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description: An elevation of privilege issue exists due to improper handling of reparse points by Microsoft Windows. This could allow an attacker to overwrite or delete targeted files that normally require elevated permissions. To exploit this, an attacker must first log on to the system and then run a specially crafted application. The issue is addressed by correcting how Windows handles reparse points.

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

Weakness Enumeration

CWE-264

Related Identifiers

BDU:2020-04837

CVE-2020-16877

Affected Products

Windows

References · 11

• https://bdu.fstec.ru/vul/2020-04837 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16877 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16877 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2020-16877 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-16877 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-16877 · Security Note
• https://t.me/defcon_news/60733 · Telegram Post
• https://t.me/cibsecurity/15357 · Telegram Post
• https://t.me/rnetsec/13683 · Telegram Post
• https://t.me/cybersecuritytechnologies/2042 · Telegram Post
• https://t.me/sysadm_in_channel/2364 · Telegram Post