5.4 Medium
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:A/AC:M/Au:N/C:P/I:P/A:P
6.8 Medium
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
0.004 Low
EPSS
Percentile
72.8%
**ATTENTION:**Public exploits are available.
Vendor: PHOENIX CONTACT
Equipment: WLAN capable devices using the WPA2 Protocol
Vulnerabilities: Reusing a Nonce
PHOENIX CONTACT reports that these vulnerabilities affect all versions of the following WLAN capable devices using the WPA2 Protocol:
Successful exploitation of these vulnerabilities could allow an attacker to operate as a “man-in-the-middle” between the device and the wireless access point.
PHOENIX CONTACT has reported that users operating embedded devices in AP mode are not affected by these vulnerabilities. PHOENIX CONTACT is actively working on discovering how these vulnerabilities affect its products and plans to release future updates as they become available. For more information, please see the advisory at this location:
<https://cert.vde.com/de-de/advisories/vde-2017-003>
PHOENIX CONTACT recommends that users apply the security update provided by Microsoft at the following location for devices running Microsoft Windows:
<https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-13080>
If WPA-TKIP is being used for WLAN configuration, PHOENIX CONTACT recommends the user switch to AES-CCMP immediately.
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 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.
These vulnerabilities are not remotely exploitable. High skill level is needed to exploit.
Multiple products are affected by key reinstallation attacks known as KRACK. The four-way hand shake traffic in the Wi-Fi Protected Access WPA and WPA2 protocol can be manipulated to allow nonce reuse resulting in key reinstallation. This could allow an attacker to execute a “man-in-the-middle” attack, enabling the attacker within radio range to replay, decrypt, or spoof frames.
The following CVEs have been assigned to this group of vulnerabilities:
CVE-2017-13077: reinstallation of the pairwise key in the four-way handshake,
CVE-2017-13078: reinstallation of the group key in the four-way handshake, and
CVE-2017-13080: reinstallation of the group key in the group key handshake,
A CVSS v3 base score of 6.8 has been assigned; the CVSS vector string is (AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).
Mathy Vanhoef of imec-DistriNet, KU Leuven discovered these vulnerabilities. PHOENIX CONTACT reported these vulnerabilities to CERT@VDE. CERT@VDE coordinated these vulnerabilities with ICS-CERT.
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-2017-13077
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-13078
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-13080
cert.vde.com/de-de/advisories/vde-2017-003
cwe.mitre.org/data/definitions/323.html
portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-13080
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5.4 Medium
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:A/AC:M/Au:N/C:P/I:P/A:P
6.8 Medium
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
0.004 Low
EPSS
Percentile
72.8%