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Multiple vulnerabilities in Omron PLC CJ, CS and NJ Series



Published: 2019-12-13
Severity High
Patch available NO
Number of vulnerabilities 4
CVE ID CVE-2019-18261
CVE-2019-18269
CVE-2019-13533
CVE-2019-18259
CWE ID CWE-307
CWE-940
CWE-294
CWE-290
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Omron PLC NJ series
Hardware solutions / Other hardware appliances

Omron PLC CS series
Hardware solutions / Other hardware appliances

Omron PLC CJ series
Hardware solutions / Other hardware appliances

Vendor Omron

Security Advisory

1) Improper Restriction of Excessive Authentication Attempts

Severity: Medium

CVSSv3: 6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-18261

CWE-ID: CWE-307 - Improper Restriction of Excessive Authentication Attempts

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to the system.

The vulnerability exists in the FTP function due to the affected software does not implement sufficient measures to prevent multiple failed authentication attempts within in a short time frame. A remote attacker can perform a brute-force authentication attack and gain access to the target system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Omron PLC NJ series: -

CPE External links

https://ics-cert.us-cert.gov/advisories/icsa-19-346-03
http://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper Verification of Source of a Communication Channel

Severity: High

CVSSv3: 7.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-18269

CWE-ID: CWE-940 - Improper Verification of Source of a Communication Channel

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to unexpected functionality.

The vulnerability exists due to incomplete check on FINS header. A remote attacker can send a specially crafted request, gain privileges and access unexpected functionality.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Omron PLC CS series: -

Omron PLC CJ series: -

CPE External links

http://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Authentication Bypass by Capture-replay

Severity: High

CVSSv3: 7.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-13533

CWE-ID: CWE-294 - Authentication Bypass by Capture-replay

Exploit availability: No

Description

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

The vulnerability exists in the FINS communication protocol due to the FINS communication packet between a controller and a PLC may be monitored and it may invite replay attack using commands for the PLC. A remote attacker can cause opening and closing of industrial valves.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Omron PLC CS series: -

Omron PLC CJ series: -

CPE External links

http://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Authentication Bypass by Spoofing

Severity: Medium

CVSSv3: 5.1 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-18259

CWE-ID: CWE-290 - Authentication Bypass by Spoofing

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists in the FINS communication protocol due to the FINS communication packet between a controller and a PLC may be monitored and it may invite replay attack using commands for the PLC. A remote attacker can perform an ID-theft or execute commands on the target system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Omron PLC CS series: -

Omron PLC CJ series: -

CPE External links

http://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.