Advisory Details

October 14th, 2021

Schneider Electric IGSS Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2021-22802
CVSS SCORE	9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Schneider Electric
AFFECTED PRODUCTS	IGSS
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Schneider Electric IGSS. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of TCP traffic by the dc.exe process. 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 user running IGSS.
ADDITIONAL DETAILS	Schneider Electric has issued an update to correct this vulnerability. More details can be found at: https://us-cert.cisa.gov/ics/advisories/icsa-21-285-03
DISCLOSURE TIMELINE	2021-07-30 - Vulnerability reported to vendor 2021-10-14 - Coordinated public release of advisory
CREDIT	Vyacheslav Moskvin

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