4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
21.3%
**ATTENTION:**Low skill level to exploit.
Vendor: PHOENIX CONTACT
Equipment: mGuard
Vulnerability: Improper Validation of Integrity Check Value
The following versions of mGuard, a network device, are affected:
Successful exploitation of this vulnerability could allow for an attacker to modify firmware update packages.
PHOENIX CONTACT recommends that affected users upgrade to firmware version 8.6.1
<http://www.phoenixcontact.net/qr/2702547/firmware_update>
<http://www.phoenixcontact.net/qr/2700967/firmware_update>
<http://www.phoenixcontact.net/qr/2700968/firmware_update>
<http://www.phoenixcontact.net/qr/2700197/firmware_update>
<http://www.phoenixcontact.net/qr/2700198/firmware_update>
<http://www.phoenixcontact.net/qr/2701275/firmware_update>
<http://www.phoenixcontact.net/qr/2701278/firmware_update>
<http://www.phoenixcontact.net/qr/2700642/firmware_update>
<http://www.phoenixcontact.net/qr/2702139/firmware_update>
<http://www.phoenixcontact.net/qr/2701875/firmware_update>
<http://www.phoenixcontact.net/qr/2700634/firmware_update>
<http://www.phoenixcontact.net/qr/2200515/firmware_update>
<http://www.phoenixcontact.net/qr/2702465/firmware_update>
<http://www.phoenixcontact.net/qr/2702259/firmware_update>
<http://www.phoenixcontact.net/qr/2701876/firmware_update>
<http://www.phoenixcontact.net/qr/2701877/firmware_update>
<http://www.phoenixcontact.net/qr/2700640/firmware_update>
<http://www.phoenixcontact.net/qr/2700639/firmware_update>
<http://www.phoenixcontact.net/qr/2903441/firmware_update>
<http://www.phoenixcontact.net/qr/2903440/firmware_update>
http://www.phoenixcontact.net/qr/2700640/firmware_update
<http://www.phoenixcontact.net/qr/2903588/firmware_update>
<http://www.phoenixcontact.net/qr/2903586/firmware_update>
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 in the NCCIC 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 NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability. This vulnerability is not remotely exploitable.
mGuard devices rely on internal checksums for verification of the internal integrity of the update packages. Verification may not always be performed correctly, allowing an attacker to modify firmware update packages.
CVE-2018-5441 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
PHOENIX CONTACT reported to CERT@VDE that their products are affected. CERT@VDE coordinated this vulnerability with NCCIC.
Critical Infrastructure Sectors: Communications, Critical Manufacturing, Information Technology
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-5441
www.phoenixcontact.net/qr/2200515/firmware_update
www.phoenixcontact.net/qr/2700197/firmware_update
www.phoenixcontact.net/qr/2700198/firmware_update
www.phoenixcontact.net/qr/2700634/firmware_update
www.phoenixcontact.net/qr/2700639/firmware_update
www.phoenixcontact.net/qr/2700640/firmware_update
www.phoenixcontact.net/qr/2700640/firmware_update%20
www.phoenixcontact.net/qr/2700642/firmware_update
www.phoenixcontact.net/qr/2700967/firmware_update
www.phoenixcontact.net/qr/2700968/firmware_update
www.phoenixcontact.net/qr/2701275/firmware_update
www.phoenixcontact.net/qr/2701278/firmware_update
www.phoenixcontact.net/qr/2701875/firmware_update
www.phoenixcontact.net/qr/2701876/firmware_update
www.phoenixcontact.net/qr/2701877/firmware_update
www.phoenixcontact.net/qr/2702139/firmware_update
www.phoenixcontact.net/qr/2702259/firmware_update
www.phoenixcontact.net/qr/2702465/firmware_update
www.phoenixcontact.net/qr/2702547/firmware_update
www.phoenixcontact.net/qr/2903440/firmware_update
www.phoenixcontact.net/qr/2903441/firmware_update
www.phoenixcontact.net/qr/2903586/firmware_update
www.phoenixcontact.net/qr/2903588/firmware_update
cwe.mitre.org/data/definitions/354.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=PHOENIX%20CONTACT%20mGuard+https://www.cisa.gov/news-events/ics-advisories/icsa-18-030-01
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-18-030-01&title=PHOENIX%20CONTACT%20mGuard
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-18-030-01
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-030-01
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=PHOENIX%20CONTACT%20mGuard&body=www.cisa.gov/news-events/ics-advisories/icsa-18-030-01
4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
21.3%