SB2017082502 - Multiple vulnerabilities in Westermo MRD-305-DIN, MRD-315, MRD-355, and MRD-455

Description

This security bulletin contains information about 3 vulnerabilities.

1) Cross-site request forgery (CVE-ID: CVE-2017-12703)

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

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

The vulnerability allows a remote unauthenticated attacker to perform CSRF attack.

The weakness exists due to a lack of defense against cross-site request forgery (CSRF) attacks. A remote attacker can create a specially crafted HTML page or URL, trick the victim into visiting it, gain access to the system and perform arbitrary actions.

2) Security restrictions bypass (CVE-ID: CVE-2017-12709)

CWE-ID: CWE-798 - Use of Hard-coded Credentials

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

The vulnerability allows a local attacker to bypass security restrictions.

The weakness exists due to use of hard-coded credentials. A local attacker can gain access to the device.

3) Security restrictions bypass (CVE-ID: CVE-2017-5816)

CWE-ID: CWE-321 - Use of Hard-coded Cryptographic Key

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

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to use of hard-coded credentials. A remote attacker can decrypt traffic from any other source.

Remediation

Install update from vendor's website.

References

• https://ics-cert.us-cert.gov/advisories/ICSA-17-236-01