CVE-2022-31801: An unauthenticated, remote attacker could upload malicious logic to the devices based on ProConOS/ProConOS eCLR in order to gain full control over the device.

PriorityP264critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

1.03%

59.4th percentile

An unauthenticated, remote attacker could upload malicious logic to the devices based on ProConOS/ProConOS eCLR in order to gain full control over the device.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
phoenix_contact	multiprog	—	—
phoenix_contact	proconos	—	—
phoenix_contact	proconos_eclr	—	—

Detection & IOCsextracted from sources · hover to see the quote

→Monitor for unauthenticated logic upload attempts to ProConOS/ProConOS eCLR-based controllers — the vulnerability allows arbitrary code upload with no authentication or integrity check required ↗
→Alert on any logic/program upload traffic to industrial controllers running ProConOS or MULTIPROG from unexpected or external sources, particularly where no authentication exchange is observed ↗
→Flag engineering-tool-to-controller communication sessions originating outside of locally protected or VPN-secured environments as potentially malicious ↗

·No known public exploits exist at time of advisory publication, reducing immediate weaponized-exploit detection surface but not eliminating risk from targeted actors ↗
·The vulnerability is in the SDK itself; downstream OEM devices built on ProConOS/ProConOS eCLR are also affected — detection scope must extend beyond Phoenix Contact-branded products to any device using this SDK ↗

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.010.0CRITICALAV:N/AC:L/Au:N/C:C/I:C/A:C

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