Advisory Details

August 18th, 2021

Siemens JT2Go DGN File Parsing Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2021-32944
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 DGN 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	https://us-cert.cisa.gov/ics/advisories/icsa-21-222-01 https://cert-portal.siemens.com/productcert/pdf/ssa-365397.pdf
DISCLOSURE TIMELINE	2021-03-16 - Vulnerability reported to vendor 2021-08-18 - Coordinated public release of advisory
CREDIT	Mat Powell of Trend Micro Zero Day Initiative

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