InterMesh 7177 Hybrid 2.0 Subscriber: Incorrect Privilege Assignment
CVE-2024-47904 is a high-severity incorrect privilege assignment vulnerability in InterMesh 7177 Hybrid 2.0 Subscriber from Siemens, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists version V8.2.12 as the first without the flaw, so updating InterMesh 7177 Hybrid 2.0 Subscriber to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.2% 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 InterMesh 7177 Hybrid 2.0 Subscriber to V8.2.12 or a later version.
- Update InterMesh 7707 Fire Subscriber to V7.2.12 or 7.2.12, whichever matches your release line, or a later version.
- Update intermesh_7177_hybrid2.0_subscriber to 8.2.12 or a later version.
- Read the advisory on cert-portal.siemens.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Siemens | InterMesh 7177 Hybrid 2.0 Subscriber | before V8.2.12 | V8.2.12 |
| Siemens | InterMesh 7707 Fire Subscriber | before V7.2.12; before 7.2.12 | V7.2.12, 7.2.12 |
| Siemens | intermesh_7177_hybrid2.0_subscriber | before 8.2.12 | 8.2.12 |
| Siemens | Intermesh 7707 Fire Subscriber Firmware | before 7.2.12 | 7.2.12 |
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
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (siemens.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.5 | High | CNA (siemens.com) |
| CVSS 3.1 | 7.8 | High | CNA (siemens.com) |
Official description
A vulnerability has been identified in InterMesh 7177 Hybrid 2.0 Subscriber (All versions < V8.2.12), InterMesh 7707 Fire Subscriber (All versions < V7.2.12 only if the IP interface is enabled (which is not the default configuration)). The affected devices contain a SUID binary that could allow an authenticated local attacker to execute arbitrary commands with root privileges.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Incorrect Privilege Assignment
A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.
How developers prevent this class of flaw
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Run your code using the lowest privileges that are required to accomplish the necessary tasks. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
More Incorrect Privilege Assignment vulnerabilities (CWE-266)
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 vulnerabilities in InterMesh 7177 Hybrid 2.0 Subscriber
- 9.1 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Incorrect Privilege Assignment vulnerabilities
- 8.8 High severity
- 9.8 Critical severity
- 8.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 7.2 High severity
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