Advisory Details

February 24th, 2021

Siemens JT2Go DXF and DWG File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-21-220
ZDI-CAN-11901

CVE ID CVE-2021-25178
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 JT2Go
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Siemens JT2Go. 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 DXF and DWG files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. 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-21-040-06
DISCLOSURE TIMELINE
  • 2020-09-30 - Vulnerability reported to vendor
  • 2021-02-24 - Coordinated public release of advisory
CREDIT rgod
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