Advisory Details

January 29th, 2021

Fuji Electric V-Server Lite VPR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2021-22641
CVSS SCORE	7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Fuji Electric
AFFECTED PRODUCTS	V-Server Lite
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Fuji Electric V-Server Lite. 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 parsing of VPR files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
ADDITIONAL DETAILS	Fuji Electric has issued an update to correct this vulnerability. More details can be found at: https://us-cert.cisa.gov/ics/advisories/icsa-21-026-01
DISCLOSURE TIMELINE	2020-09-02 - Vulnerability reported to vendor 2021-01-29 - Coordinated public release of advisory 2021-06-29 - Advisory Updated
CREDIT	khangkito - Tran Van Khang of VinCSS (Member of Vingroup)

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