Use-after-free in Microsoft Office and Microsoft PowerPoint - CVE-2021-27056

Detailed vulnerability description

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

The vulnerability exists due to improper input validation in the Microsoft PowerPoint. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger a use-after-free error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

How to mitigate CVE-2021-27056

Sources

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27056
• https://www.zerodayinitiative.com/advisories/ZDI-21-333/