DATE(S) ISSUED:
1/13/2021
SUBJECT:
Multiple Vulnerabilities in Siemens JT2Go and Teamcenter Visualization Could Lead to Arbitrary Code Execution (ICSA-21-012-03)
OVERVIEW:
Multiple vulnerabilities have been discovered in Siemens’ JT2Go and Teamcenter Visualization products, the most severe of which could allow for arbitrary code execution in the context of the system process. JT2Go and Teamcenter Visualization are used for viewing 3D models. Depending on the privileges associated with the application, an attacker could view, change, or delete data. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.
THREAT INTELLIGENCE:
There are currently no reports of these vulnerabilities being exploited in the wild.
SYSTEMS AFFECTED:
- JT2Go versions prior to 13.1.0
- Teamcenter Visualization versions prior to 13.1.0
Note: version 13.1.0 of JT2Go and Teamcenter Visualization is vulnerable to the following:
- CVE-2020-26989
- CVE-2020-26990
- CVE-2020-26991
RISK:
Government:
- Large and medium government entities: High
- Small government entities: Medium
Businesses:
- Large and medium business entities: High
- Small business entities: Medium
Home users: Low
TECHNICAL SUMMARY:
Multiple vulnerabilities have been discovered in Siemens’ JT2Go and Teamcenter Visualization products, the most severe of which could allow for arbitrary code execution in the context of the system process. Exploits can be triggered by an unsuspecting user opening a malicious file with the vulnerable software.
Details of the vulnerabilities are as follows:
- An XML External Entity injection vulnerability (CVE-2020-26981)
- An out-of-bounds write error when parsing ‘CG4’ and ‘CGM’ files (CVE-2020-26982 and CVE-2020-26996)
- An out-of-bounds write error when parsing ‘JT’ files (CVE-2020-26984)
- An out-of-bounds write error when parsing ‘PAR’ files (CVE-2020-26988 and CVE-2020-28383)
- An out-of-bounds write error when parsing ‘PDF’ files (CVE-2020-26983)
- An out-of-bounds write error when parsing ‘RGB’ and ‘SGI’ files (CVE-2020-26995)
- A heap-based buffer-overflow when parsing ‘JT’ files (CVE-2020-26986)
- A heap-based buffer-overflow when parsing ‘PCX’ files (CVE-2020-26994)
- A heap-based buffer-overflow when parsing ‘RGB’ and ‘SGI’ files (CVE-2020-26985)
- A heap-based buffer-overflow when parsing ‘TGA’ files (CVE-2020-26987)
- A stack-based buffer-overflow when parsing ‘CGM’ files (CVE-2020-26992 and CVE-2020-26993)
- A stack-based buffer-overflow when parsing ‘PAR’ files (CVE-2020-26989)
- A type-confusion vulnerability when parsing JT files (CVE-2020-26980)
- A type-confusion vulnerability when parsing ‘ASM’ files (CVE-2020-26990)
- An untrusted pointer dereference when parsing ‘ASM’ files (CVE-2020-26991)
Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser. Depending on the privileges associated with the application, an attacker could view, change, or delete data. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.
RECOMMENDATIONS:
We recommend the following actions be taken:
- Install the updates provided by Siemens immediately after appropriate testing.
- Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.
- Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments especially from un-trusted sources.
- Apply the Principle of Least Privilege to all systems and services; run all software as a nonprivileged user with minimal access rights.
REFERENCES:
Siemens:
CVE:
US-CERT: