8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
0.023 Low
EPSS
Percentile
89.6%
**ATTENTION:**Remotely exploitable/low skill level to exploit
**Vendor:**Rockwell Automation
Equipment: Allen-Bradley Stratix and ArmorStratix
Vulnerabilities: SNMP Remote Code Execution Vulnerabilities in Cisco IOS and IOS XE Software
This advisory was originally posted to the NCCIC Portal on July 27, 2017, and is being released to the NCCIC/ICS-CERT web site.
The following versions of Allen-Bradley Stratix and ArmorStratix switches are affected:
Successful exploitation of these vulnerabilities could allow an authenticated, remote attacker to execute code on an affected system or cause an affected system to crash and reload.
According to Rockwell Automation, multiple Cisco Systems, Inc. vulnerabilities in the Simple Network Management Protocol (SNMP) subsystem of Cisco IO and IOS XE software have been identified which affect certain products in the Allen-Bradley Stratix and ArmorStratix product lines.
For more information about the SNMP vulnerabilities identified by Cisco, see their advisory at the link below:
<https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp>
Rockwell Automation recommends users of affected products consult the suggestions below and, when possible, employ multiple strategies to mitigate their risk:
For the Stratix 8300 Product Family, Catalog Numbers 1783-RMS, Rockwell Automation suggests updating to v15.2(4a)EA5 or later. This can be found at the following link:
<https://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15>
Rockwell Automation has provided interim compensating controls for the remaining Allen-Bradley Stratix and ArmorStratix switches to help reduce the risk of exploitation of these vulnerabilities. Rockwell Automation encourages users to evaluate the compensating controls provided below and apply the possible mitigations.
Details on how to use the Command Line Interface to disable or limit access to SNMP or individual MIBs can be found at Knowledgebase Article ID 1055391. A login is required to view the article.
Note: The Stratix device may not have all of the MIBs installed/active.
As new versions of firmware are released to remediate this vulnerability, Rockwell Automation will provide mitigation updates in their advisory. For more information about these vulnerabilities, mitigation updates, and Rockwell Automation’s general security guidelines, please see Rockwell Automation’s security advisory found at the following link. A login is required to view the advisory.
<https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1055133>
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 ICS‑CERT Technical Information Paper, ICS-TIP-12-146-01B–Targeted 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.
No known public exploits specifically target this vulnerability.
Cisco Systems, Inc. has identified multiple SNMP remote code execution vulnerabilities in Cisco IOS and IOS XE Software affecting version of Allen-Bradley Stratix and ArmorStratix. To exploit these vulnerabilities via SNMP v2c or earlier, attacker must know the SNMP read-only community string for the affected system. To exploit these vulnerabilities in SNMP v3, an attacker must authenticate with user credentials. If exploited, this could allow a remote attacker to execute arbitrary code on the affected Stratix and ArmorStratix system.
CVE-2017-6736, CVE-2017-6737, CVE-2017-6738, CVE-2017-6739, CVE-2017-6740, CVE-2017-6741, CVE-2017-6742, CVE-2017-6743 and CVE-2017-6744 have been assigned to these vulnerabilities. A CVSS v3 base score of 8.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Cisco discovered these vulnerabilities during internal testing. Rockwell Automation reported these vulnerabilities to ICS-CERT.
Critical Infrastructure Sectors: Critical Manufacturing, Energy, and Water and Wastewater Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Milwaukee, Wisconsin
compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6736
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6737
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6738
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6739
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6740
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6741
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6742
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6743
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6744
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
rockwellautomation.custhelp.com/app/answers/detail/a_id/1055133
rockwellautomation.custhelp.com/app/answers/detail/a_id/55484https:/rockwellautomation.custhelp.com/app/answers/detail/a_id/1055391
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
twitter.com/CISAgov
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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mailto:?subject=Rockwell%20Automation%20Allen-Bradley%20Stratix%20and%20ArmorStratix&body=www.cisa.gov/news-events/ics-advisories/icsa-17-208-04
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
0.023 Low
EPSS
Percentile
89.6%