7.8 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
48.6%
CVSS v3 7.5
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: GE
Equipment: PACSystems CPE305/310, CPE330, CPE400, RSTi-EP CPE 100, CPU320/CRU320, RXi
Vulnerability: Improper Input Validation
Successful exploitation of this vulnerability could cause the device to reboot and change its state, causing the device to become unavailable.
The following versions of PACSystems, an industrial Internet controller, are affected:
The device does not properly validate input, which could allow a remote attacker to send specially crafted packets causing the device to become unavailable.
CVE-2018-8867 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Younes Dragoni of Nozomi Networks reported the vulnerability to NCCIC.
GE has released the following firmware to mitigate the vulnerability (login required):
IC695CPE305 – <https://digitalsupport.ge.com/communities/en_US/Download/IC695CPE305-PACSystems-RX3i-CPU-DN> – Upgrade Kit: CPE305_FW9_40_41G1733-MS10-000-A17.zip
IC695CPE310 – <https://digitalsupport.ge.com/communities/en_US/Download/IC695CPE310-PACSystems-RX3i-CPU-DN> – Upgrade Kit: CPE310_FW9_40_41G1734-MS10-000-A17.zip
IC695CPE330 – <https://digitalsupport.ge.com/communities/en_US/Download/IC695CPE330-PACSystems-RX3i-CPU-DN> – Upgrade Kit: CPE330_FW9_40_41G2016-FW01-000-A11.zip
IC695CPE400 – <https://digitalsupport.ge.com/communities/en_US/Download/IC695CPE400-PACSystems-RX3i-Rackless-CPU-with-Field-Agent> – Upgrade Kit: CPE400_FW9_40_41G2376-FW01-000-A3.zip
For CPE100 the newest firmware can be obtained through the following link:
<https://digitalsupport.ge.com/communities/en_US/Download/EPSCPE100-RSTi-EP-CPU-Firmware>
GE reports that CPU/CRU320 is end of life, and there is a direct upgrade path available to users.
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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.
NCCIC also recommends that users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target this vulnerability.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-8867
cwe.mitre.org/data/definitions/20.html
digitalsupport.ge.com/communities/en_US/Download/EPSCPE100-RSTi-EP-CPU-Firmware
digitalsupport.ge.com/communities/en_US/Download/IC695CPE305-PACSystems-RX3i-CPU-DN
digitalsupport.ge.com/communities/en_US/Download/IC695CPE310-PACSystems-RX3i-CPU-DN
digitalsupport.ge.com/communities/en_US/Download/IC695CPE330-PACSystems-RX3i-CPU-DN
digitalsupport.ge.com/communities/en_US/Download/IC695CPE400-PACSystems-RX3i-Rackless-CPU-with-Field-Agent
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7.8 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
48.6%