CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
52.8%
**ATTENTION:**Remotely exploitable/low skill level to exploit
Vendor: Westermo
Equipment: MRD-305-DIN, MRD-315, MRD-355, and MRD-455
**Vulnerabilities:**Cross-Site Request Forgery (CSRF), Use of Hard-Coded Credentials, and Use of Hard-Coded Cryptographic Key
The following Westermo router models and firmware versions are affected:
Successful exploitation of these vulnerabilities could allow a remote attacker to obtain hard-coded cryptographic keys, hard-coded credentials, or trick a user into submitting a malicious request, resulting in the attacker gaining unauthorized access to the device and running arbitrary code.
Westermo recommends that users update to the latest firmware version 1.7.7.0. The new version can be downloaded at:
Westermo has also released a security advisory that can be found at:
<http://www.westermo.com/solutions/cyber-security/resource-centre>
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
ICS-CERT also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available in the ICSβCERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
The application does not verify whether a request was intentionally provided by the user, making it possible for an attacker to trick a user into making a malicious request to the server.
CVE-2017-12703 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
The device utilizes hard-coded credentials, which could allow for unauthorized local low privileged access to the device.
CVE-2017-12709 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
The device utilizes hard-coded private cryptographic keys that may allow an attacker to decrypt traffic from any other source.
CVE-2016-5816 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N).
Mandar Jadhav from Qualys Security has identified the vulnerabilities.
Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing, and Energy
Countries/Areas Deployed: Worldwide
**Company Headquarters Location:**Sweden
www.westermo.com/
www.westermo.com/solutions/cyber-security/resource-centre
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cwe.mitre.org/data/definitions/798.html
nvd.nist.gov/vuln/detail/CVE-2016-5816
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nvd.nist.gov/vuln/detail/CVE-2017-12709
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CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
52.8%