Advisory Details

March 1st, 2023

Siemens Solid Edge Viewer DWG File Parsing Use-After-Free Remote Code Execution Vulnerability

ZDI-23-210
ZDI-CAN-19080

CVE ID CVE-2021-43336
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Siemens
AFFECTED PRODUCTS Solid Edge Viewer
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Siemens Solid Edge Viewer. 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 DWG files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Siemens has issued an update to correct this vulnerability. More details can be found at:
https://cert-portal.siemens.com/productcert/html/ssa-491245.html
DISCLOSURE TIMELINE
  • 2022-10-04 - Vulnerability reported to vendor
  • 2023-03-01 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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