Advisory Details

This vulnerability allows remote attackers to disclose sensitive information 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 3DXML files. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the current process.

This vulnerability is being disclosed publicly without a patch in accordance with the ZDI 120 day deadline.

12/04/20 - ZDI reported the vulnerabilities to ICS-CERT
12/07/20 - ICS-CERT confirmed receipt of the report
12/08/20 - ICS-CERT communicated that the issue is in a third-party component
02/24/21 - ZDI requested an update
02/25/21 - ICS-CERT confirmed that the vendor was working on a fix
03/18/21 - ZDI requested an update
03/18/21 - ICS-CERT requested an extension
03/22/21 - ZDI agreed to an extension until 04/13/21
04/14/21 - ZDI requested an update
04/27/21 - ZDI requested an update
04/27/21 - The vendor provided CVEs for the cases
05/03/21 - ICS-CERT requested an extension until 05/25/21
05/04/21 - ZDI notified ICS-CERT of the intention to publish this report as a 0-day advisories on 05/12/21

-- Mitigation:
Given the nature of the vulnerability the only salient mitigation strategy is to restrict interaction with the application.

• 2020-12-04 - Vulnerability reported to vendor
• 2021-05-12 - Coordinated public release of advisory