Advisory Details

July 19th, 2021

Siemens JT2Go PCT File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-21-854
ZDI-CAN-13403

CVE ID CVE-2021-34318
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 PCT 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 buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS

https://us-cert.cisa.gov/ics/advisories/icsa-21-194-15
https://cert-portal.siemens.com/productcert/pdf/ssa-483182.pdf


DISCLOSURE TIMELINE
  • 2021-03-16 - Vulnerability reported to vendor
  • 2021-07-19 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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