Remote code execution in Microsoft LNK

1) Input validation error

EUVDB-ID: #VU25865

Risk: High

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-0684

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists in Microsoft Windows due to insufficient validation of user-supplied input when processing .LNK file. A remote attacker can trick a victim to open a removable drive or remote share, that contains a malicious .LNK file and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7 - 10

Windows Server: 2008 R2 - 2019 1909

CPE2.3

• cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:8.1:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10 1607:10.0.14393.10:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10 1709:10.0.16299.19:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10 1803:10.0.17134.48:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10 1809:10.0.17763.1:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10 1903:10.0.18362.116:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10 1909:10.0.18363.476:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:*

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0684

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.