SB2018081419 - Remote code execution when processing LNK files in Microsoft Windows

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2018-8345)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to an error when processing .LNK files (windows shortcuts). A remote attacker can place a specially crafted .LNK file along with associated malicious binary and automatically execute it when the victim opens a removable drive or a remote share that contains .LNK file.

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

2) Improper input validation (CVE-ID: CVE-2018-8346)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to an error when processing .LNK files (windows shortcuts). A remote attacker can place a specially crafted .LNK file along with associated malicious binary and automatically execute it when the victim opens a removable drive or a remote share that contains .LNK file.

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

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8345
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8346