SB2020061031 - Multiple vulnerabilities in Siemens SIMATIC, SINAMICS, SINEC, SINEMA and SINUMERIK

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Insecure DLL loading (CVE-ID: CVE-2020-7585)

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner. A local user can use a specially crafted .dll file, trick the victim into opening a file, associated with the vulnerable application, and execute arbitrary code on victim's system.

2) Heap-based buffer overflow (CVE-ID: CVE-2020-7586)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error. A local user can pass specially crafted data to the applicatoin, trigger heap-based buffer overflow and cause a denial of service condition on the target system.

3) Unquoted Search Path or Element (CVE-ID: CVE-2020-7580)

The vulnerability allows a local user to execute arbitrary code on the target system. 

The vulnerability exist due to a component within the affected application that regularly calls a helper binary with SYSTEM privileges while the call path is not quoted. A local administrator can execute arbitrary code with SYSTEM level privileges.

Remediation

Install update from vendor's website.

References

• https://ics-cert.us-cert.gov/advisories/icsa-20-161-05
• https://cert-portal.siemens.com/productcert/pdf/ssa-689942.pdf
• https://ics-cert.us-cert.gov/advisories/icsa-20-161-04
• https://cert-portal.siemens.com/productcert/pdf/ssa-312271.pdf