PT-2020-4696 · Microsoft · Windows Kernel+1

Mateusz Jurczyk + 1 · Published 2020-10-31 · Updated 2025-10-29 · CVE-2020-17087

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 Kernel (affected versions not specified)

Description The issue is caused by a buffer overflow in the Windows Kernel cryptography driver, cng.sys, allowing an attacker to execute arbitrary code with a specially crafted program. This is an elevation-of-privilege vulnerability that can affect the system. It has been reported that this issue is being exploited in the wild.

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

Exploit

LPE

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-131

Related Identifiers

BDU:2020-05248

CVE-2020-17087

Affected Products

Windows

Windows Kernel

References · 29

• 🔥 https://github.com/vp777/Windows-Non-Paged-Pool-Overflow-Exploitation · Exploit
• 🔥 https://github.com/revengsh/CVE-2020-17087 · Exploit
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17087 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-17087 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2020-17087 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-17087 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2020-17087 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-05248 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17087 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-17087 · Vendor Advisory
• https://t.me/cybersecuritytechnologies/4580 · Telegram Post
• https://t.me/cybersecuritytechnologies/2358 · Telegram Post
• https://t.me/cybersecuritytechnologies/3985 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2020103102 · Note
• https://t.me/rnetsec/13675 · Telegram Post