10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
58.7%
**ATTENTION:**Remotely exploitable/low skill level to exploit. Public exploits are available.
Vendor: JanTek
Equipment: JTC-200
Vulnerabilities: Cross-site Request Forgery, Improper Authentication
The following versions of JTC-200, a TCP/IP converter, are affected:
Successful exploitation of these vulnerabilities could allow for remote code execution on the device with elevated privileges.
JanTek will not be developing mitigations for the vulnerabilities affecting JTC-200. JanTek will be developing a JTC-300 model scheduled for release near the end of 2017.
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.
An attacker could perform actions with the same permissions as a victim user, provided the victim has an active session and is induced to trigger the malicious request.
CVE-2016-5789 has been assigned to this vulnerability. A CVSS v3 base score of 8.0 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).
The improper authentication could provide undocumented Busybox Linux shell accessible over Telnet service without any authentication.
CVE-2016-5791 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Karn Ganeshan reported the vulnerabilities to ICS-CERT.
Critical Infrastructure Sectors: Critical Manufacturing
Countries/Areas Deployed: Europe and Asia
Company Headquarters Location: Taiwan
cwe.mitre.org/data/definitions/287.html
cwe.mitre.org/data/definitions/352.html
nvd.nist.gov/vuln/detail/CVE-2016-5789
nvd.nist.gov/vuln/detail/CVE-2016-5791
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mailto:?subject=JanTek%20JTC-200&body=www.cisa.gov/news-events/ics-advisories/icsa-17-283-02
10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
58.7%