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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8 High
AI Score
Confidence
Low
0.009 Low
EPSS
Percentile
82.7%
Successful exploitation of these vulnerabilities could allow an attacker to change settings, delete the application, run remote code, cause a system crash, cause a denial-of-service condition, revert to factory settings, and overwrite MAC addresses.
The following versions of I/O-CHECK software are affected by the listed vulnerabilities:
A specially crafted packet could cause the server to send back packets containing data from the stack.
CVE-2019-5073 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
The affected products are vulnerable to a buffer overflow condition due to the lack of input validation, which may allow remote execution of arbitrary code.
CVE-2019-5074 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
The affected products are vulnerable to a buffer overflow condition due to the lack of input validation, which may allow remote execution of arbitrary code.
CVE-2019-5075 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
An attacker can send an unauthenticated packet that will overwrite the MAC address stored persistently on the device. This can cause the device to enter an error state where it ceases all network communications.
CVE-2019-5077 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H).
An attacker can send an unauthenticated packet that will erase system data on the device. This may cause the device to enter an error state where it ceases all network communications.
CVE-2019-5078 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H).
The affected products are vulnerable to a buffer overflow condition due to the lack of input validation, which may allow remote execution of arbitrary code.
CVE-2019-5079 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H).
An attacker can send unauthenticated packets that will cause the device to restore factory settings. This may cause the device to enter an error state where it ceases all network communications.
CVE-2019-5080 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H).
Lack of input validation may allow an attacker to trigger a buffer overflow condition by sending unauthenticated packets to the device, which may allow remote execution of arbitrary code.
CVE-2019-5081 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H).
The affected products are vulnerable to a buffer overflow condition due to the lack of input validation, which may allow remote execution of arbitrary code.
CVE-2019-5082 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H).
Kelly Leuschner of Cisco Talos coordinated these vulnerabilities with CERT@VDE.
WAGO recommends updating to the latest firmware, FW 15 or above.
WAGO has identified the following specific workarounds and mitigations users can apply to reduce the risk:
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.gov. 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 on the ICS webpage on us-cert.gov in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5073
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5074
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5075
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5077
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5078
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5079
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5080
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5081
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-5082
cwe.mitre.org/data/definitions/120.html
cwe.mitre.org/data/definitions/120.html
cwe.mitre.org/data/definitions/120.html
cwe.mitre.org/data/definitions/201.html
cwe.mitre.org/data/definitions/306.html
cwe.mitre.org/data/definitions/306.html
cwe.mitre.org/data/definitions/306.html
cwe.mitre.org/data/definitions/805.html
cwe.mitre.org/data/definitions/805.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8 High
AI Score
Confidence
Low
0.009 Low
EPSS
Percentile
82.7%