Advisory Details

April 15th, 2020

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

CVE ID	CVE-2020-0906
CVSS SCORE	7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Excel
VULNERABILITY DETAILS	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.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0906
DISCLOSURE TIMELINE	2020-03-05 - Vulnerability reported to vendor 2020-04-15 - Coordinated public release of advisory
CREDIT	hackyzh and lm0963 of DBAppSecurity Zion Lab

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