ctrlX HMI Web Panel - WR21 (WR2107): Missing Authentication for Critical Functionality
CVE-2023-45851 is a high-severity missing authentication for critical functionality vulnerability in ctrlX HMI Web Panel - WR21 (WR2107) from Bosch Rexroth, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected ctrlX HMI Web Panel - WR21 (WR2107) versions: all. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.52% 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 ctrlx_hmi_web_panel_wr2107 to RC7(Build date 20231107) or a later version.
- Read the advisory on psirt.bosch.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Bosch Rexroth | ctrlX HMI Web Panel - WR21 (WR2107) | all | Not stated |
| Bosch Rexroth | ctrlX HMI Web Panel - WR21 (WR2110) | all | Not stated |
| Bosch Rexroth | ctrlX HMI Web Panel - WR21 (WR2115) | all | Not stated |
| Boschrexroth | ctrlx_hmi_web_panel_wr2107 | before RC7(Build date 20231107) | RC7(Build date 20231107) |
| Boschrexroth | Ctrlx Hmi Web Panel Wr2107 Firmware | Not specified in the record | Not stated |
| Boschrexroth | Ctrlx Hmi Web Panel Wr2110 Firmware | Not specified in the record | Not stated |
| Boschrexroth | Ctrlx Hmi Web Panel Wr2115 Firmware | Not specified in the record | Not stated |
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
- AdjacentThe attacker must be on the same local network segment.
- 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
- 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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | CNA (bosch.com) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
The Android Client application, when enrolled to the AppHub server,connects to an MQTT broker without enforcing any server authentication. This issue allows an attacker to force the Android Client application to connect to a malicious MQTT broker, enabling it to send fake messages to the HMI device
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Authentication for Critical Functionality
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
How developers prevent this class of flaw
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator.
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data.
More Missing Authentication for Critical Functionality vulnerabilities (CWE-306)
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
Advisories
Other vulnerabilities in ctrlX HMI Web Panel - WR21 (WR2107)
- 8.8 High severity
- 8.8 High severity
Recent Missing Authentication for Critical Functionality vulnerabilities
- 7.5 High severity
- 8.8 High severity
- 8.8 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
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