CVE-2025-40818
BaseFortify
Publication date: 2025-12-09
Last updated on: 2025-12-10
Assigner: Siemens AG
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| siemens | sinema_remote_connect_server | 3.1 |
| siemens | sinema_remote_connect_server | to 3.2 (inc) |
| siemens | sinema_remote_connect_server | 3.2 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-732 | The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in SINEMA Remote Connect Server versions before V3.2 SP4, where private SSL/TLS keys stored on the server are not properly protected. This flaw allows any user with access to the server to read these private keys, which could enable an authenticated attacker to impersonate the server, perform man-in-the-middle attacks, decrypt traffic, or gain unauthorized access to services that trust these certificates.
How can this vulnerability impact me? :
If exploited, this vulnerability could allow an attacker with server access to impersonate the server, intercept and decrypt secure communications, and gain unauthorized access to trusted services. This compromises confidentiality and could lead to data exposure or unauthorized actions within the affected environment.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by checking the permissions of the private SSL/TLS key files on the SINEMA Remote Connect Server. Since the issue involves improper protection of these keys allowing any user with server access to read them, you can verify the file permissions on the server to see if they are overly permissive. For example, on a Linux-based system, you can use commands like 'ls -l' on the directory containing the SSL/TLS keys to check if unauthorized users have read access. Specific commands might include: 'ls -l /path/to/ssl/keys' and 'stat /path/to/ssl/keys/private.key' to inspect permissions and ownership. If the keys are accessible to non-privileged users, the system is vulnerable. [1]
What immediate steps should I take to mitigate this vulnerability?
The immediate mitigation step is to update the SINEMA Remote Connect Server to version V3.2 SP4 or later, as this update addresses the vulnerability. Additionally, implement general security measures such as restricting network access with appropriate mechanisms and configuring the environment according to Siemens' operational guidelines for Industrial Security. Ensuring proper file permissions on the private SSL/TLS keys to prevent unauthorized access is also recommended. [1]
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided resources do not explicitly address how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA. However, since the vulnerability involves improper protection of private SSL/TLS keys allowing potential unauthorized access and man-in-the-middle attacks, it could pose risks to data confidentiality and integrity, which are critical aspects of such regulations. Organizations using affected versions should remediate the vulnerability to maintain compliance, but no direct statement on compliance impact is given. [1]