Opcenter Execution Foundation: Permissive Cross-domain Security Policy with Untrusted Domains
CVE-2023-46281 is a high-severity permissive cross-domain security policy with untrusted domains vulnerability in Opcenter Execution Foundation from Siemens, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. The record lists version V2407 as the first without the flaw, so updating Opcenter Execution Foundation to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.94% chance of exploitation within 30 days, higher than 61% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Opcenter Execution Foundation to V2407 or a later version.
- Update Opcenter Quality to V2312 or a later version.
- Update SIMATIC PCS neo to V4.1 or a later version.
- Read the advisory on cert-portal.siemens.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Siemens | Opcenter Execution Foundation | before V2407 | V2407 |
| Siemens | Opcenter Quality | before V2312 | V2312 |
| Siemens | SIMATIC PCS neo | before V4.1 | V4.1 |
| Siemens | SINEC NMS | before V2.0 SP1 | V2.0 SP1 |
| Siemens | Totally Integrated Automation Portal (TIA Portal) V14 | all versions | Not stated |
| Siemens | Totally Integrated Automation Portal (TIA Portal) V15.1 | all versions | Not stated |
| Siemens | Totally Integrated Automation Portal (TIA Portal) V16 | all versions | Not stated |
| Siemens | Totally Integrated Automation Portal (TIA Portal) V17 | before V17 Update 8 | V17 Update 8 |
| Siemens | Totally Integrated Automation Portal (TIA Portal) V18 | before V18 Update 3 | V18 Update 3 |
| Siemens | Sinumerik Integrate Runmyhmi /automotive | Not specified in the record | Not stated |
| Siemens | Totally Integrated Automation Portal | 14.0 up to, but not including, 15; 15 up to, but not including, 16; 16 up to, but not including, 17; 17 up to, but not including, 18; 18 | 15, 16, 17, 18 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.1 | High | CNA (siemens.com) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
A vulnerability has been identified in Opcenter Execution Foundation (All versions < V2407), Opcenter Quality (All versions < V2312), SIMATIC PCS neo (All versions < V4.1), SINEC NMS (All versions < V2.0 SP1), Totally Integrated Automation Portal (TIA Portal) V14 (All versions), Totally Integrated Automation Portal (TIA Portal) V15.1 (All versions), Totally Integrated Automation Portal (TIA Portal) V16 (All versions), Totally Integrated Automation Portal (TIA Portal) V17 (All versions < V17 Update 8), Totally Integrated Automation Portal (TIA Portal) V18 (All versions < V18 Update 3). When accessing the UMC Web-UI from affected products, UMC uses an overly permissive CORS policy. This could allow an attacker to trick a legitimate user to trigger unwanted behavior.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Permissive Cross-domain Security Policy with Untrusted Domains
The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.
How developers prevent this class of flaw
- Define a restrictive Content Security Policy or cross-domain policy file.
- Avoid using wildcards in the CSP / cross-domain policy file. Any domain matching the wildcard expression will be implicitly trusted, and can perform two-way interaction with the target server.
- For Flash, modify crossdomain.xml to use meta-policy options such as 'master-only' or 'none' to reduce the possibility of an attacker planting extraneous cross-domain policy files on a server.
More Permissive Cross-domain Security Policy with Untrusted Domains vulnerabilities (CWE-942)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
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