SB2021111618 - Multiple vulnerabilities in WECON PLC Editor

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2021-42705)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error while processing project 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 write (CVE-ID: CVE-2021-42707)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error while processing project files. A remote attacker can trigger out-of-bounds write and execute arbitrary code 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-21-315-01