6.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:P/A:P
7.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
0.001 Low
EPSS
Percentile
40.8%
**ATTENTION:**Remotely exploitable/low skill level to exploit.
Vendor: Cambium Networks
Equipment: ePMP
Vulnerabilities: Improper Access Control, Improper Privilege Management
Cambium reports that the vulnerabilities affect the following ePMP Network Access Control products:
Successful exploitation of these vulnerabilities may allow an attacker to access device configuration as well as make unauthorized changes to the productโs configuration.
Cambium recommends that users with the affected products should update to firmware version 3.4-RC7 or newer. This update can be found by logging in at the following location:
<https://support.cambiumnetworks.com/login>
Cambium also recommends that users edit default SNMP configuration. Affected models come set with the default values of โpublicโ and โprivateโ for RO (read only) and RW (read write) community strings. Cambium recommends changing this to a random string consisting of eight or more characters in length, including both upper and lower case letters and numbers for variability.
NCCIC/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 ICSโCERT Technical Information Paper, ICS-TIP-12-146-01BโTargeted 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.
Exploits that target these vulnerabilities are publicly available.
After a valid user has used SNMP configuration export, an attacker is able to remotely trigger device configuration backups using specific MIBs. These backups lack proper access control and may allow access to sensitive information and possibly allow for configuration changes.
CVE-2017-7918 has been assigned to this vulnerability. A CVSS v3 base score of 6.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L).
The privileges for SNMP community strings are not properly restricted, which may allow an attacker to gain access to sensitive information and possibly allow for configuration changes.
CVE-2017-7922 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L).
Karn Ganeshen identified these vulnerabilities.
Critical Infrastructure Sector: Information Technology
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Rolling Meadows, Illinois
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-7918
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-7922
cwe.mitre.org/data/definitions/269.html
cwe.mitre.org/data/definitions/284.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.cambiumnetworks.com/login
twitter.com/CISAgov
twitter.com/intent/tweet?text=Cambium%20Networks%20ePMP+https://www.cisa.gov/news-events/ics-advisories/icsa-17-166-01
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www.dhs.gov/foia
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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:L/A:L
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
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mailto:?subject=Cambium%20Networks%20ePMP&body=www.cisa.gov/news-events/ics-advisories/icsa-17-166-01
6.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:P/A:P
7.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
0.001 Low
EPSS
Percentile
40.8%