SB2019021301 - Remote code execution in Microsoft Windows SMB

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2019-0630)

CWE-ID: CWE-20 - Improper input validation

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

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

The vulnerability exists due to an error when the Microsoft Server Message Block 2.0 (SMBv2) server handles certain requests. A remote attacker can send a specially crafted packet to a targeted SMBv2 server and execute arbitrary code with elevated privileges.

2) Input validation error (CVE-ID: CVE-2019-0633)

CWE-ID: CWE-20 - Improper input validation

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

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

The vulnerability exists due to an error when the Microsoft Server Message Block 2.0 (SMBv2) server handles certain requests. A remote attacker can send a specially crafted packet to a targeted SMBv2 server and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0630
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0633