SB2021051206 - Multiple vulnerabilities in Siemens SIMATIC SmartVNC HMI WinCC Products
Published: May 12, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Access of Memory Location After End of Buffer (CVE-ID: CVE-2021-25660)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error. A remote authenticated attacker can send a specially crafted data and cause a denial of service condition on the target system.
2) Access of Memory Location After End of Buffer (CVE-ID: CVE-2021-25661)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error. A remote authenticated attacker can send a specially crafted data and cause a denial of service condition on the target system.
3) Improper Handling of Exceptional Conditions (CVE-ID: CVE-2021-25662)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the affected software fails to handle an exception properly if the program execution process is modified. A remote authenticated attacker can send a specially crafted packet and cause a denial of service condition on the target system.
4) Buffer overflow (CVE-ID: CVE-2021-27383)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the server Tight encoder. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.
5) Access of Memory Location After End of Buffer (CVE-ID: CVE-2021-27384)
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to a boundary error in the device layout handler represented by a binary data stream on client side. A remote attacker can execute arbitrary code on th target system.
6) Resource exhaustion (CVE-ID: CVE-2021-27385)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send specially crafted packets to a SmartVNC device layout handler on the client side, trigger resource exhaustion and perform a denial of service (DoS) attack.
7) Buffer overflow (CVE-ID: CVE-2021-27386)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the device layout handler on client side. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.