7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
0.004 Low
EPSS
Percentile
73.4%
Security researcher George Lashenko of CyberX has identified a buffer overflow vulnerability in Schneider Electric’s ConneXium firewall product. Schneider Electric is developing a firmware update to mitigate this vulnerability.
This vulnerability is remotely exploitable.
The following ConneXium firewalls are affected:
An exploit of this vulnerability could result in a buffer overflow that could allow an attacker to execute code during the SNMP (Simple Network Management Protocol) login authentication process.
Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation.
Schneider Electric’s corporate headquarters is located in Paris, France, and maintains offices in more than 100 countries worldwide.
The affected products, ConneXium firewalls, are network firewalls. According to Schneider Electric, ConneXium firewalls are deployed across several sectors including Commercial Facilities Sector and others. Schneider Electric estimates that these products are used worldwide.
A buffer overflow can be triggered during the SNMP login authentication process that may allow an attacker to remotely execute code.
CVE-2016-8352NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-8352, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H, web site last accessed November 01, 2016.
This vulnerability could be exploited remotely.
No known public exploits specifically target this vulnerability.
An attacker with a low skill would be able to exploit this vulnerability.
Schneider Electric is in the process of updating ConneXium firewall products to resolve this vulnerability through a firmware update. The updated firmware will be available on the Schneider Electric web site for download.
Schneider Electric recommends users contact their local Schneider representative for additional information.
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 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.
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mailto:?subject=Schneider%20Electric%20ConneXium%20Buffer%20Overflow%20Vulnerability&body=www.cisa.gov/news-events/ics-advisories/icsa-16-306-01
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
0.004 Low
EPSS
Percentile
73.4%