SB2021031006 - Multiple vulnerabilities in Siemens SIMATIC S7-PLCSIM

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Infinite loop (CVE-ID: CVE-2021-25673)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop. A remote authenticated attacker can use a specially crafted file to consume all available system resources and cause denial of service conditions.

2) NULL pointer dereference (CVE-ID: CVE-2021-25674)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote authenticated attacker can use a specially crafted file and perform a denial of service (DoS) attack.

3) Division by zero (CVE-ID: CVE-2021-25675)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to division by zero error in the application when it is used to open a specially crafted file. A remote authenticated can cause a denial of service condition on the target system.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://ics-cert.us-cert.gov/advisories/icsa-21-068-01
• https://cert-portal.siemens.com/productcert/pdf/ssa-256092.pdf