Firmware Decryption Vulnerability in SICAM A8000 CP-8031 and CP-8050
Monitor4.6SSA-128393Dec 10, 2024
Attack VectorPhysical
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
The SICAM A8000 CP-8031 and CP-8050 devices contain a firmware decryption vulnerability that allows an attacker with physical access to decrypt and extract the firmware. Both firmware and hardware updates are required to remediate this issue.
What this means
What could happen
An attacker with physical access to a SICAM A8000 CP-8031 or CP-8050 device could decrypt the firmware, potentially exposing sensitive configuration and control logic used in the substation.
Who's at risk
Utilities operating Siemens SICAM A8000 substation automation systems, particularly those using CP-8031 or CP-8050 communication processors in substations where physical device security may be a concern.
How it could be exploited
An attacker must obtain physical possession of the device and use decryption techniques to extract and read the encrypted firmware. This is not a remote attack and requires hands-on access to the hardware.
Prerequisites
- Physical access to the SICAM A8000 CP-8031 or CP-8050 device
- Ability to extract firmware from the device
Firmware decryption possiblePhysical access requiredAffects critical substation infrastructure
Exploitability
Low exploit probability (EPSS 0.1%)
Affected products (1)
ProductAffected VersionsFix Status
CPCI85 Central Processing/Communication< V05.3005.30
Remediation & Mitigation
0/2
Schedule — requires maintenance window
0/2Patching may require device reboot — plan for process interruption
HOTFIXUpdate CPCI85 Central Processing/Communication to firmware version V05.30 or later
HOTFIXApply hardware update in addition to firmware update to fully resolve the vulnerability
CVEs (1)
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