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 vulnerabilities.
1) Access of Memory Location After End of Buffer (CVE-ID: CVE-2021-25660)
CWE-ID: CWE-788 - Access of Memory Location After End of Buffer
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
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)
CWE-ID: CWE-788 - Access of Memory Location After End of Buffer
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
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)
CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
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)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
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)
CWE-ID: CWE-788 - Access of Memory Location After End of Buffer
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
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)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
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)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
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.