Full Report
Spectrum Power 7 is affected by a vulnerability that could allow an authenticated local attacker to inject arbitrary code to the update script and escalate privileges. Siemens has released an update for Spectrum Power 7 and recommends to update to the latest version.
Analysis Summary
# Vulnerability: Local Privilege Escalation in Spectrum Power 7 via Improper Access Rights on Update Script
## CVE Details
- CVE ID: CVE-2023-38557
- CVSS Score: 8.2 (High)
- CWE: CWE-732: Incorrect Permission Assignment for Critical Resource
## Affected Systems
- Products: Spectrum Power 7
- Versions: All versions prior to V23Q3
- Configurations: Requires authenticated local access.
## Vulnerability Description
The vulnerability exists because the affected product assigns improper access rights to the update script. This flaw could allow an authenticated local attacker to inject arbitrary code into the update script, leading to privilege escalation on the system.
## Exploitation
- Status: The CVSS vector indicates an 'E:P' (Proof-of-Concept) existence, suggesting public knowledge or demonstration of exploitability, though not explicitly stated as "Exploited in the wild."
- Complexity: Low (AC:L)
- Attack Vector: Local (AV:L)
## Impact
- Confidentiality: High (C:H)
- Integrity: High (I:H)
- Availability: High (A:H)
## Remediation
### Patches
- Update to **V23Q3 or a later version** of Spectrum Power 7.
### Workarounds
- For any versions of Spectrum Power 7 prior to V23Q3, contact Siemens customer support for specific remediation guidance.
- Implement general security measures: protect network access using firewalls/segmentation/VPNs, and adhere to operational guidelines for a protected IT environment.
- Operators should ensure multi-level redundant secondary protection schemes are in place as required by regulations for critical power systems.
## Detection
- Indicators of compromise would involve unauthorized modifications to the update script or unexpected privilege changes.
- Detection methods should focus on monitoring file integrity of critical system scripts, especially update binaries, and reviewing account/privilege changes involving system accounts.
## References
- https://cert-portal.siemens.com/productcert/html/ssa-357182.html
- https://www.first.org/cvss/
- https://cwe.mitre.org/