SB2021012816 - Multiple vulnerabilities in Fuji Electric Tellus Lite V-Simulator and V-Server Lite

Description

This security bulletin contains information about 5 vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2021-22637)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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 target system.

The vulnerability exists due to a boundary error when processing VPR files. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Out-of-bounds read (CVE-ID: CVE-2021-22655)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing project files. A remote attacker can trigger out-of-bounds read error and read contents of memory on the system.

3) Out-of-bounds write (CVE-ID: CVE-2021-22653)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input when processing project files. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

4) Access of Uninitialized Pointer (CVE-ID: CVE-2021-22639)

CWE-ID: CWE-824 - Access of Uninitialized Pointer

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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 target system.

The vulnerability exists due to an uninitialized pointer issue when processing VPR files. A remote attacker can use a specially crafted project file and execute arbitrary code on the target system.

5) Heap-based buffer overflow (CVE-ID: CVE-2021-22641)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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 target system.

The vulnerability exists due to a boundary error when processing VPR files. A remote attacker can trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-026-01
• https://www.zerodayinitiative.com/advisories/ZDI-21-097/
• https://www.zerodayinitiative.com/advisories/ZDI-21-098/
• https://www.zerodayinitiative.com/advisories/ZDI-21-099/