Advisory Details

February 25th, 2021

Siemens SINEC NMS FirmwareFileUtils extractToFolder Directory Traversal Remote Code Execution Vulnerability

ZDI-21-253
ZDI-CAN-12054

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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