5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.024 Low
EPSS
Percentile
89.7%
**ATTENTION:**Remotely exploitable/low skill level to exploit.
Vendor: PHOENIX CONTACT, Innominate Security Technologies
Equipment: mGuard firmware
**Vulnerability:**Null Pointer Dereference
The following versions of mGuard firmware versions 8.0.0 to 8.5.1, running on these mGuard Network Security Appliances, are affected:
Successful exploitation of this vulnerability could allow attackers to cause a remote denial of service and force a restart of all IPSec connections.
PHOENIX CONTACT and Innominate Security Technologies recommend all users running mGuard devices with affected firmware versions to update to firmware Version 8.5.2 or higher, which fixes this vulnerability. Links to updates and additional information can be found in the CERT@VDE advisory at the following location:
<https://cert.vde.com/de-de/advisories/vde-2017-001>
NCCIC/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 ICSβCERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted 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.
No known public exploits specifically target this vulnerability. This vulnerability is remotely exploitable.
Openswan 2.6.39 and earlier, which is used in the mGuard firmware version 8.0.0 to 8.5.1, allows remote attackers to cause a denial of service (NULL pointer dereference and IKE daemon restart) via IKEv2 packets that lack expected payloads.
CVE-2013-6466 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).
PHOENIX CONTACT has reported this vulnerability via CERT@VDE to ICS-CERT.
Critical Infrastructure Sectors: Communications, Critical Manufacturing, Information Technology
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
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