SB2021041629 - Multiple vulnerabilities in EIPStackGroup OpENer Ethernet/IP

Description

This security bulletin contains information about 5 vulnerabilities.

1) Incorrect Conversion between Numeric Types (CVE-ID: CVE-2021-27482)

CWE-ID: CWE-681 - Incorrect Conversion between Numeric Types

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 incorrect conversion between numeric types in OpENer EtherNet/IP. A remote attacker can send a specifically crafted packet and cause a denial of service condition on the target system.

2) Out-of-bounds read (CVE-ID: CVE-2021-27478)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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 in OpENer EtherNet/IP. A remote attacker can send a specifically crafted packet, trigger out-of-bounds read error and read contents of memory on the system.

3) Reachable Assertion (CVE-ID: CVE-2021-27500)

CWE-ID: CWE-617 - Reachable Assertion

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 reachable assertion in OpENer EtherNet/IP. A remote attacker can send a specially crafted packet and cause a denial of service condition on the target system.

4) Reachable Assertion (CVE-ID: CVE-2021-27498)

CWE-ID: CWE-617 - Reachable Assertion

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 reachable assertion in OpENer EtherNet/IP. A remote attacker can send a specially crafted packet and cause a denial of service condition on the target system.

5) Out-of-bounds read (CVE-ID: CVE-2021-21777)

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

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 condition in the Ethernet/IP UDP handler functionality. A remote attacker can trigger out-of-bounds read error and cause a denial of service condition on the system.

Remediation

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

References

• https://ics-cert.us-cert.gov/advisories/icsa-21-105-02
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1234