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
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
0.975 High
EPSS
Percentile
100.0%
**ATTENTION:**Remotely exploitable/low skill level to exploit.
Vendor: Rockwell Automation
Equipment: Allen-Bradley Stratix, Allen-Bradley ArmorStratix
Vulnerability: Improper Input Validation
The following versions of the Allen-Bradley Stratix and ArmorStratix Industrial Ethernet and Distribution switches are affected:
Successful exploitation of this vulnerability may allow a remote attacker to impact the availability of the target device or to execute arbitrary code with elevated privileges.
Rockwell Automation has provided interim compensating controls for Allen-Bradley Stratix and ArmorStratix switches to help reduce the risk of exploitation of the vulnerability identified in the Cisco Cluster Management Protocol (CMP) processing code used in the Cisco IOS and Cisco IOS XE software. Allen-Bradley Stratix and ArmorStratix products contain the affected versions of the Cisco IOS and IOS XE software.
Rockwell Automation encourages users to evaluate the compensating controls provided below and apply the applicable controls.
<https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1040270>
Rockwell Automation security advisory, Stratix CMP Remote Code Execution Vulnerability, is available at the following location (with a valid account):
<https://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102>
Ciscoβs security advisory, Cisco IOS and IOS XE Software Cluster Management Protocol Remote Code Execution Vulnerability, is available at the following location:
<https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp>
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of this vulnerability. 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 unauthorized remote attacker may be able to establish a Telnet session with a target device by sending malformed CMP-specific Telnet messages. Incorrect processing of these messages may cause the device to reload or to allow the attacker to execute arbitrary code with elevated privileges.
CVE-2017-3881 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).
Rockwell Automation has reported this vulnerability.
Critical Infrastructure Sector(s): Critical Manufacturing, Energy, Water and Wastewater Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Milwaukee, Wisconsin
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-3881
cwe.mitre.org/data/definitions/20.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
rockwellautomation.custhelp.com/app/answers/detail/a_id/1040270
rockwellautomation.custhelp.com/app/answers/detail/a_id/54102
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp
twitter.com/CISAgov
twitter.com/intent/tweet?text=Rockwell%20Automation%20Allen-Bradley%20Stratix%20and%20Allen-Bradley%20ArmorStratix+https://www.cisa.gov/news-events/ics-advisories/icsa-17-094-03
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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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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
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
0.975 High
EPSS
Percentile
100.0%