Full Report
A vulnerability in Xpedition Designer could allow an attacker with an unprivileged account to override or modify the service executable and subsequently gain elevated privileges. Siemens has released updates for the affected products and recommends to update to the latest versions.
Analysis Summary
# Vulnerability: Local Privilege Escalation in Xpedition Designer via Improper Permission Assignment
## CVE Details
- CVE ID: CVE-2022-31465
- CVSS Score: 7.8 (High)
- CWE: CWE-732: Incorrect Permission Assignment for Critical Resource
## Affected Systems
- Products: Xpedition Designer
- Versions:
- VX.2.10 (All versions < VX.2.10 Update 13)
- VX.2.11 (All versions < VX.2.11 Update 11)
- VX.2.12 (All versions < VX.2.12 Update 5)
- VX.2.13 (All versions < VX.2.13 Update 1)
- Configurations: Requires an authenticated local attacker with an unprivileged account.
## Vulnerability Description
The vulnerability stems from improper access rights assigned to the service executable within Xpedition Designer. This flaw allows an authenticated local attacker, even with unprivileged credentials, to override or modify the service executable. Successfully doing so enables the attacker to inject arbitrary code and consequently escalate their privileges to a higher level.
## Exploitation
- Status: Not explicitly stated as exploited in the wild, but a fix implies exploitability. The CVSS vector E:P (Exploit Code Maturity: Proof-of-Concept code exists) is suggested by the scoring terminology, though the advisory does not explicitly confirm PoC availability. **Assuming PoC is publicly known based on E:P.**
- Complexity: Low (AC:L)
- Attack Vector: Local (AV:L)
## Impact
- Confidentiality: High (C:H)
- Integrity: High (I:H)
- Availability: High (A:H)
## Remediation
### Patches
- Upgrade **Xpedition Designer VX.2.10** to **Update 13 or later**.
- Upgrade **Xpedition Designer VX.2.11** to **Update 11 or later**.
- Upgrade **Xpedition Designer VX.2.12** to **Update 5 or later**.
- Upgrade **Xpedition Designer VX.2.13** to **Update 1 or later**.
### Workarounds
1. Harden the application server environment to prevent local access by untrusted personnel.
2. Remove write permissions for non-administrative users on files and folders located under the Xpedition Designer installation path.
## Detection
- The primary detection mechanism involves monitoring for unauthorized modifications or write attempts to the service executable files associated with Xpedition Designer processes, particularly those running with elevated privileges.
- Review system logs for anomalous privilege changes originating from unprivileged user sessions attempting to interact with Xpedition Designer binaries.
## References
- Vendor Advisory: [https://cert-portal.siemens.com/productcert/html/ssa-988345.html](https://cert-portal.siemens.com/productcert/html/ssa-988345.html)
- Siemens Support Portal: [https://support.sw.siemens.com/en-US/product/852852130/](https://support.sw.siemens.com/en-US/product/852852130/)
- CVSS Scoring System: [https://www.first.org/cvss/](https://www.first.org/cvss/)
- CWE List: [https://cwe.mitre.org/](https://cwe.mitre.org/)
- General Security Recommendations Download: [https://www.siemens.com/cert/operational-guidelines-industrial-security](https://www.siemens.com/cert/operational-guidelines-industrial-security)