Advisory Details

February 25th, 2021

Siemens SINEC NMS FirmwareFileUtils extractToFolder Directory Traversal Remote Code Execution Vulnerability

CVE ID	CVE-2020-25237
CVSS SCORE	8.8, AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Siemens
AFFECTED PRODUCTS	SINEC NMS
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Siemens SINEC NMS. Authentication is required to exploit this vulnerability. The specific flaw exists within the FirmwareFileUtils class. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of SYSTEM.
ADDITIONAL DETAILS	https://us-cert.cisa.gov/ics/advisories/icsa-21-040-03 https://cert-portal.siemens.com/productcert/pdf/ssa-156833.pdf
DISCLOSURE TIMELINE	2020-10-16 - Vulnerability reported to vendor 2021-02-25 - Coordinated public release of advisory
CREDIT	rgod

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