ctrlX HMI Web Panel - WR21 (WR2107): Missing Authentication for Critical Functionality
CVE-2023-41255 is a high-severity missing authentication for critical functionality vulnerability in ctrlX HMI Web Panel - WR21 (WR2107) from 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 0.49% 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
- Check which version of ctrlX HMI Web Panel - WR21 (WR2107) you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on psirt.bosch.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Rexroth | ctrlX HMI Web Panel - WR21 (WR2107) | all | Not stated |
| Rexroth | ctrlX HMI Web Panel - WR21 (WR2110) | all | Not stated |
| Rexroth | ctrlX HMI Web Panel - WR21 (WR2115) | all | Not stated |
| Boschrexroth | ctrlx_hmi_web_panel_wr2107 | all versions | Not stated |
| Boschrexroth | ctrlx_hmi_web_panel_wr2110 | all versions | Not stated |
| Boschrexroth | ctrlx_hmi_web_panel_wr2115 | all versions | Not stated |
| 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 vulnerability allows an unprivileged user with access to the subnet of the TPC-110W device to gain a root shell on the device itself abusing the lack of authentication of the ‘su’ binary file installed on the device that can be accessed through the ADB (Android Debug Bridge) protocol exposed on the network.
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
- 7.8 High severity
- 7.8 High severity
Recent Missing Authentication for Critical Functionality vulnerabilities
- 7.5 High severity
- 8.8 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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