CVE-2020-1464 - Improper Verification of Cryptographic Signature

Severity

55%

Complexity

18%

Confidentiality

60%

A spoofing vulnerability exists when Windows incorrectly validates file signatures, aka 'Windows Spoofing Vulnerability'.

CVSS 3.1 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:P/A:N).

Demo Examples

Improper Verification of Cryptographic Signature

CWE-347

In the following code, a JarFile object is created from a downloaded file.


               
JarFile jf = new JarFile(f);

The JAR file that was potentially downloaded from an untrusted source is created without verifying the signature (if present). An alternate constructor that accepts a boolean verify parameter should be used instead.

Overview

Type

Microsoft Windows

First reported 4 years ago

2020-08-17 19:15:00

Last updated 4 years ago

2020-08-21 16:39:00

Affected Software

Microsoft Windows 10 1709

1709

Microsoft Windows 10 1803

1803

Microsoft Windows 10 1809

1809

Microsoft Windows 10 1909

1909

Microsoft Windows RT 8.1

Microsoft Windows Server 2008 Service Pack 2

Microsoft Windows Server 2012

Microsoft Windows Server 2016

Microsoft Windows Server 2016 1909

1909

Microsoft Windows Server 2019

References

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/@TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd

N/A

https://blog.virustotal.com/2019/01/distribution-of-malicious-jar-appended.html

Third Party Advisory

https://krebsonsecurity.com/2020/08/microsoft-put-off-fixing-zero-day-for-2-years/

Third Party Advisory

https://medium.com/@TalBeerySec/glueball-the-story-of-cve-2020-1464-50091a1f98bd

Exploit, Third Party Advisory

N/A

Patch, Vendor Advisory

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