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Siemens SICAM Products

Act Now9.8ICS-CERT ICSA-24-207-01Jul 22, 2024
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

Multiple Siemens SICAM products contain unauthorized password reset and firmware downgrade vulnerabilities in the CPCI85 Central Processing/Communication module and SICORE Base system. These flaws allow unauthenticated attackers with network access to reset administrator passwords or downgrade device firmware without valid credentials, leading to privilege escalation and information disclosure. Affected products include SICAM A8000 device firmware, SICAM EGS device firmware, and SICAM 8 Software Solution.

What this means
What could happen
An attacker could reset administrator passwords or downgrade firmware on SICAM A8000, SICAM EGS, or SICAM 8 systems without authentication, gaining full control over power grid or substation automation equipment and potentially disrupting critical energy distribution operations.
Who's at risk
Electric utilities, transmission operators, and energy companies operating Siemens SICAM A8000, SICAM EGS, or SICAM 8 systems for substation automation and power distribution control. This affects both the central processing units (CPCI85) and base software systems (SICORE) that manage grid equipment and switching operations.
How it could be exploited
An attacker with network access to the CPCI85 or SICORE interface can send specially crafted requests to trigger an unauthorized password reset or initiate a firmware downgrade without providing valid credentials. This allows the attacker to overwrite admin credentials or roll back to a version with known weaknesses, then log in with those credentials to modify device behavior or extract sensitive data.
Prerequisites
  • Network access to CPCI85 Central Processing/Communication or SICORE Base system interface
  • No authentication credentials required
  • Device must be reachable from attacker's network segment
Remotely exploitable over networkNo authentication requiredLow complexity to exploitCritical CVSS score (9.8)Affects industrial control system with no public exploit available yetPassword reset could lead to privilege escalationFirmware downgrade could enable other known vulnerabilities
Exploitability
Low exploit probability (EPSS 0.3%)
Affected products (2)
2 with fix
ProductAffected VersionsFix Status
CPCI85 Central Processing/Communication<V5.405.40
SICORE Base system<V1.4.01.4.0
Remediation & Mitigation
0/5
Do now
0/2
WORKAROUNDDisable the auto-login feature on CPCI85 and SICORE systems (CVE-2024-37998)
HARDENINGRestrict network access to CPCI85 and SICORE interfaces using firewall rules; do not expose these management interfaces to untrusted networks or the internet
Schedule — requires maintenance window
0/2

Patching may require device reboot — plan for process interruption

CPCI85 Central Processing/Communication
HOTFIXUpdate CPCI85 Central Processing/Communication to firmware version 5.40 or later
SICORE Base system
HOTFIXUpdate SICORE Base system to version 1.4.0 or later
Long-term hardening
0/1
HARDENINGIsolate SICAM device management networks from business networks using air-gapped or highly restricted connections
View full CISA ICS-CERT advisory
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