CVE-2020-1464

CVE-2020-1464 is a high-severity (CVSS 7.8) vulnerability in Microsoft Windows. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files. In an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded. The update addresses the vulnerability by correcting how Windows validates file signatures.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

• https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html
• https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/
• https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464
• https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html
• https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/
• https://medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464