Microsoft Excel XLS File Use-After-Free Remote Code Execution Vulnerability

2020-04-15T00:00:00
ID ZDI-20-470
Type zdi
Reporter hackyzh and lm0963 of DBAppSecurity Zion Lab
Modified 2020-06-22T00:00:00

Description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Excel. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of XLS files. Crafted data in an XLS file can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code in the context of the current process.