Zero-day vulnerability in Windows

Improper input validation
CVE-2017-8464

Vulnerability details

Advisory: SB2017061406 - Remote code execution when processing .LNK files in Microsoft Windows

Vulnerable component: Windows

CVE-ID: CVE-2017-8464

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-20 - Improper input validation

Description:

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to an error when processing .LNK files. A remote attacker can create a specially crafted .LNK file and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Note: the vulnerability is being actively exploited in the wild.

Public Exploits:

- Microsoft Windows - '.LNK' Shortcut File Code Execution [Exploit-DB]

- Microsoft Windows - LNK Shortcut File Code Execution (Metasploit) [Exploit-DB]

External links:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8464

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.