Siemens JT2Go BMP File Parsing Memory Corruption Remote Code Execution Vulnerability

July 19th, 2021
ZDI-21-835 ZDI-CAN-13342

CVE ID

CVE-2021-34306

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 BMP files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. 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

  • 2021-03-10 - Vulnerability reported to vendor
  • 2021-07-19 - Coordinated public release of advisory

Credit

Brian Gorenc of Trend Micro Zero Day Initiative

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