Advisory Details

January 20th, 2021

Siemens Solid Edge Viewer PAR File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-21-074
ZDI-CAN-11918

CVE ID CVE-2020-28381
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 PAR files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. 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://us-cert.cisa.gov/ics/advisories/icsa-21-012-04
DISCLOSURE TIMELINE
  • 2020-09-30 - Vulnerability reported to vendor
  • 2021-01-20 - Coordinated public release of advisory
CREDIT rgod
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