Critical severity · published Dec 17, 2020
CVE-2020-12523
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
9.1
CVSS
0.9%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FM
FL Mguard Rs4004 Tx/dtx Firmware · Phoenixcontact
before 8.8.3 · source: NVD
FM
FL Mguard Rs4004 Tx/dtx Vpn Firmware · Phoenixcontact
before 8.8.3 · source: NVD
IM
Innominate Mguard Rs4000 4tx/3g/tx Vpn Firmware · Phoenixcontact
before 8.8.3 · source: NVD
IM
Innominate Mguard Rs4000 4tx/tx Firmware · Phoenixcontact
before 8.8.3 · source: NVD
IM
Innominate Mguard Rs4000 4tx/tx Vpn Firmware · Phoenixcontact
before 8.8.3 · source: NVD
TM
TC Mguard Rs4000 3g Vpn Firmware · Phoenixcontact
All versions, or not specified · source: NVD
TM
TC Mguard Rs4000 4g Att Vpn Firmware · Phoenixcontact
before 8.8.3 · source: NVD
TM
TC Mguard Rs4000 4g Vpn Firmware · Phoenixcontact
before 8.8.3 · source: NVD
TM
TC Mguard Rs4000 4g Vzw Vpn Firmware · Phoenixcontact
before 8.8.3 · source: NVD
Affected product
FM
FL Mguard Rs4004 Tx/dtx Firmware
Phoenixcontact
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12523
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-12523
Third Party Advisory
https://cert.vde.com/en-us/advisories/vde-2020-046
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