CVE-2020-12523

Phoenix Contact mGuard Devices versions before 8.8.3: LAN ports get functional after reboot even if they are disabled in the device configuration

Description

On Phoenix Contact mGuard Devices versions before 8.8.3 LAN ports get functional after reboot even if they are disabled in the device configuration. For mGuard devices with integrated switch on the LAN side, single switch ports can be disabled by device configuration. After a reboot these ports get functional independent from their configuration setting: Missing Initialization of Resource

Remediation

Solution:

  • PHOENIX CONTACT recommends all mGuard users to upgrade to the firmware version 8.8.3.

Workaround:

  • Instead of deactivating by configuration, network cables should be detached from affected switch ports.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.38%
Third-Party Advisory vde.com
Affected: Phoenix Contact TC MGUARD RS4000 4G VZW VPN (1010461)
Affected: Phoenix Contact TC MGUARD RS4000 4G ATT VPN (1010463)
Affected: Phoenix Contact FL MGUARD RS4004 TX/DTX (2701876)
Affected: Phoenix Contact FL MGUARD RS4004 TX/DTX VPN (2701877)
Affected: Phoenix Contact TC MGUARD RS4000 3G VPN (2903440)
Affected: Phoenix Contact TC MGUARD RS4000 4G VPN (2903586)
Affected: Innominate Innominate mGuard rs4000 4TX/TX
Affected: Innominate Innominate mGuard rs4000 4TX/TX VPN
Affected: Innominate Innominate mGuard rs4000 4TX/3G/TX VPN
Published at:
Updated at:

References

Link Tags
https://cert.vde.com/en-us/advisories/vde-2020-046 third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-12523?
CVE-2020-12523 has been scored as a medium severity vulnerability.
How to fix CVE-2020-12523?
To fix CVE-2020-12523: PHOENIX CONTACT recommends all mGuard users to upgrade to the firmware version 8.8.3.
Is CVE-2020-12523 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-12523 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-12523?
CVE-2020-12523 affects Phoenix Contact TC MGUARD RS4000 4G VZW VPN (1010461), Phoenix Contact TC MGUARD RS4000 4G ATT VPN (1010463), Phoenix Contact FL MGUARD RS4004 TX/DTX (2701876), Phoenix Contact FL MGUARD RS4004 TX/DTX VPN (2701877), Phoenix Contact TC MGUARD RS4000 3G VPN (2903440), Phoenix Contact TC MGUARD RS4000 4G VPN (2903586), Innominate Innominate mGuard rs4000 4TX/TX, Innominate Innominate mGuard rs4000 4TX/TX VPN, Innominate Innominate mGuard rs4000 4TX/3G/TX VPN.
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