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
10 High
AI Score
Confidence
High
10 High
CVSS2
Access Vector
NETWORK
Access 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
0.003 Low
EPSS
Percentile
71.3%
CVSS v3 9.8
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: WAGO
Equipment: Industrial Managed Switches 852-303, 852-1305, and 852-1505
Vulnerabilities: Use of Hard-coded Credentials, Use of Hard-coded Cryptographic Key, Using Components with Known Vulnerabilities
Successful exploitation of these vulnerabilities could allow a compromise of the managed switch, resulting in disruption of communication, and root access to the operating system.
WAGO reports these vulnerabilities affect the following industrial managed switches:
3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798
An attacker with access to the hard-coded credentials may gain access to the operating system of the managed switch with root privileges, which may allow manipulation of the operating system of the managed switch.
CVE-2019-12550 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).
3.2.2 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
An attacker with access to the hard-coded SSH key may disrupt communication or compromise the managed switch. The SSH-keys cannot be regenerated by users and all switches use the same key.
CVE-2019-12549 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).
3.2.3 USING COMPONENTS WITH KNOWN VULNERABILITIES
The listed managed switches use outdated third-party components with known vulnerabilities. See the full list of CVE identifiers in CERT@VDE advisory number VDE-2019-013.
T. Weber of SEC Consult Vulnerability Lab reported these vulnerabilities to CERT@VDE.
WAGO recommends users update their managed switch to the latest firmware published June 7, 2019, or later. New firmware can be requested in the Runtime Software dropdown within the Downloads section at the links below:
<https://www.wago.com/us/switches/industrial-managed-switch/p/852-303>
<https://www.wago.com/us/switches/industrial-managed-switch/p/852-1305>
<https://www.wago.com/us/switches/industrial-managed-switch/p/852-1505>
WAGO also recommends users implement the following security measures:
For more information CERT@VDE has released a security notification which can be viewed at the following link:
<https://cert.vde.com/en-us/advisories/vde-2019-013>
NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC 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 on the ICS-CERT website 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 NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12549
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12550
cert.vde.com/en-us/advisories/vde-2019-013
cert.vde.com/en-us/advisories/vde-2019-013
cwe.mitre.org/data/definitions/321.html
cwe.mitre.org/data/definitions/798.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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www.usa.gov/
www.wago.com/us/switches/industrial-managed-switch/p/852-1305
www.wago.com/us/switches/industrial-managed-switch/p/852-1505
www.wago.com/us/switches/industrial-managed-switch/p/852-303
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mailto:?subject=WAGO%20Industrial%20Managed%20Switches%20852-303%2C%20852-1305%2C%20and%20852-1505&body=www.cisa.gov/news-events/ics-advisories/icsa-19-164-02
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
10 High
AI Score
Confidence
High
10 High
CVSS2
Access Vector
NETWORK
Access 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
0.003 Low
EPSS
Percentile
71.3%