SINEMA Remote Connect Server: Direct Request
CVE-2024-39868 is a high-severity direct request vulnerability in SINEMA Remote Connect Server from Siemens, with a CVSS 3.1 base score of 7.3 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version V3.2 SP1 as the first without the flaw, so updating SINEMA Remote Connect Server to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.36% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update SINEMA Remote Connect Server to V3.2 SP1 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.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Siemens | SINEMA Remote Connect Server | before V3.2 SP1 | V3.2 SP1 |
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
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- LowSome restricted data can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- LowPerformance or availability is reduced.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 7.2 | High | CNA (siemens.com) |
| CVSS 3.1 | 7.6 | High | CNA (siemens.com) |
| CVSS 3.1 | 7.3 | High | NVD |
Official description
A vulnerability has been identified in SINEMA Remote Connect Server (All versions < V3.2 SP1). Affected devices do not properly validate the authentication when performing certain actions in the web interface allowing an unauthenticated attacker to access and edit VxLAN configuration information of networks for which they have no privileges.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Direct Request
The web application does not adequately enforce appropriate authorization on all restricted URLs, scripts, or files.
How developers prevent this class of flaw
- Apply appropriate access control authorizations for each access to all restricted URLs, scripts or files.
- Consider using MVC based frameworks such as Struts.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in SINEMA Remote Connect Server
- 7.5 High severity
- 7.5 High severity
- 9.9 Critical severity
- 7.8 High severity
- 7.3 High severity
- 8.8 High severity
Recent Direct Request vulnerabilities
- 7.5 High severity
- 8.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 7.5 High severity
- 8.8 High severity
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