Known exploited vulnerability
CVE-2020-1464
The short answer
CVE-2020-1464 affects Microsoft Windows 10 Version 1803 and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
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.
Weakness: CWE-347.
Severity
7.8 high
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Nov 3, 2021
Federal due date May 3, 2022
EPSS, next 30 days
39%
Higher than 99% of scored CVEs
How it can be exploited
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
Windows 10 Version 1803, Windows 10 Version 1809, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 1909, Windows Server, version 1909 (Server Core installation), Windows 10 Version 1709 for 32-bit Systems, Windows 10 Version 1709, Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for x64-based Systems, Windows 10 Version 1903 for ARM64-based Systems, Windows Server, version 1903 (Server Core installation). NVD's record lists the exact affected versions.
References
- blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html Third Party Advisory
- krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/ Issue TrackingThird Party Advisory
- medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd ExploitThird Party Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464 PatchVendor Advisory
- blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html Third Party Advisory
- krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/ Issue TrackingThird Party Advisory
- medium.com/%40TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd ExploitThird Party Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1464 PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1464 US Government Resource
Questions
Is CVE-2020-1464 being exploited?
Yes. CISA added CVE-2020-1464 to its Known Exploited Vulnerabilities catalog on 2021-11-03, with a federal remediation due date of 2022-05-03.
How do I fix CVE-2020-1464?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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