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Phoenix Contact has a series of recommendations to handle a command injection vulnerability in its RAD-80211-XD, according to a report with NCCIC.

Successful exploitation of this remotely exploitable vulnerability could allow an attacker to execute system level commands with administrative privileges.

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Maxim Rupp (RuppIT) working with Phoenix Contact and CERT@VDE discovered the vulnerability.

Phoenix Contact said the following products suffer from the issue:
• RAD-80211-XD (2885728)
• RAD-80211-XD/HP-BUS (2900047)

Cyber Security

In the vulnerability, a WebHMI utility may be exploited by any logged-in user, allowing the execution of arbitrary OS commands on the server. This provides the opportunity for a command injection attack.

CVE-2019-9743 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 9.9.

The product sees use mainly in the communications, critical manufacturing, and information technology sectors. It also sees action on a global basis.

No known public exploits specifically target this vulnerability. However, an attacker with low skill level could leverage the vulnerability.

Phoenix Contact recommends the following:
• Users using Phoenix Contact 80211-XD radio modules are recommended to operate the devices in closed networks or protected with a suitable firewall.
• The affected products have been removed from active maintenance due to obsolescence. For this reason, it is recommended that concerned users upgrade to the active FL WLAN product line.

For detailed information on recommendations for measures to protect network-capable devices, click on the application note.

For more information, click on VDE-2019-007 for more details.

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