SB2023071170 - Remote code execution in Microsoft Office and Windows HTML

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2023-36884)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input when handling cross-protocol file navigation. A remote attacker can trick the victim to open a specially crafted file and execute arbitrary code on the system.

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

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-36884
• https://www.microsoft.com/en-us/security/blog/2023/07/11/storm-0978-attacks-reveal-financial-and-espionage-motives/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV230003