1. EXECUTIVE SUMMARY

CVSS v3 5.5
ATTENTION: Low attack complexity 
Vendor: VISAM 
Equipment: VBASE 
Vulnerabilities: Improper Restriction of XML External Entity Reference

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker to obtain sensitive information from the target device. 

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

VISAM reports these vulnerabilities affect the following VBASE products:  

VBASE Automation Base: versions prior to 11.7.5 

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611 

Versions of VISAM VBASE Automation Base prior to 11.7.5 may disclose information if a valid user opens a specially crafted file. 

CVE-2022-41696 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). 

3.2.2 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611 

Versions of VISAM VBASE Automation Base prior to 11.7.5 may disclose information if a valid user opens a specially crafted file. 

CVE-2022-43512 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). 

3.2.3 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611 

Versions of VISAM VBASE Automation Base prior to 11.7.5 may disclose information if a valid user opens a specially crafted file. 

CVE-2022-45121 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). 

3.2.4 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611 

Versions of VISAM VBASE Automation Base prior to 11.7.5 may disclose information if a valid user opens a specially crafted file. 

CVE-2022-45468 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). 

3.2.5 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611 

Versions of VISAM VBASE Automation Base prior to 11.7.5 may disclose information if a valid user opens a specially crafted file. 

CVE-2022-45876 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). 

3.2.6 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611 

Versions of VISAM VBASE Automation Base prior to 11.7.5 may disclose information if a valid user opens a specially crafted file. 

CVE-2022-46286 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). 

3.2.7 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611 

Versions of VISAM VBASE Automation Base prior to 11.7.5 may disclose information if a valid user opens a specially crafted file. 

CVE-2022-46300 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). 

3.3 BACKGROUND

CRITICAL INFRASTRUCTURE SECTORS: Multiple 
COUNTRIES/AREAS DEPLOYED: Worldwide 
COMPANY HEADQUARTERS LOCATION: Germany 

3.4 RESEARCHER

Kimiya, working with Trend Micro Zero Day Initiative, reported these vulnerabilities to CISA. 

4. MITIGATIONS

VISAM recommends users update to VBASE 11.7.5 or later. The update can be performed via the VBASE Editor update dialog on machines with secure access to the internet.  Users of machines without internet access must manually update by submitting a request form to receive a download link. 

For more information, users should contact VISAM using the information provided on their contact page (German language). 

CISA recommends users take the following measures to protect themselves from social engineering attacks: 

Do not click web links or open attachments in unsolicited email messages. 
Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. 
Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. 

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. 

CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely. These vulnerabilities have low attack complexity.