On various RAD-ISM-900-EN-* devices by PHOENIX CONTACT an admin user could use the traceroute…
CVE-2022-29897 is a high-severity improper input validation vulnerability in RAD-ISM-900-EN-BD/B from Phoenix Contact, with a CVSS 2.0 base score of 9.0 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected RAD-ISM-900-EN-BD/B versions: All Versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.36% chance of exploitation within 30 days, higher than 72% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of RAD-ISM-900-EN-BD/B you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| PHOENIX CONTACT | RAD-ISM-900-EN-BD/B | All Versions | Not stated |
| PHOENIX CONTACT | RAD-ISM-900-EN-BD | All Versions | Not stated |
| PHOENIX CONTACT | RAD-ISM-900-EN-BD-BUS | All Versions | Not stated |
| Phoenixcontact | Rad-ism-900-en-bd Firmware | Not specified in the record | Not stated |
| Phoenixcontact | Rad-ism-900-en-bd/b Firmware | Not specified in the record | Not stated |
| Phoenixcontact | Rad-ism-900-en-bd-bus 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
- Access vector
- NetworkCan be exploited remotely over a network.
- Access complexity
- LowNo special conditions are needed.
- Authentication
- SingleOne login is needed.
- Confidentiality
- CompleteAll data can be read.
- Integrity
- CompleteAny data can be modified.
- Availability
- CompleteThe system can be shut down completely.
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.1 | Critical | CNA (cert.vde.com) |
| CVSS 2.0 | 9.0 | High | NVD |
Official description
On various RAD-ISM-900-EN-* devices by PHOENIX CONTACT an admin user could use the traceroute utility integrated in the WebUI to execute arbitrary code with root privileges on the OS due to an improper input validation in all versions of the firmware.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
How developers prevent this class of flaw
- Consider using language-theoretic security (LangSec) techniques that characterize inputs using a formal language and build recognizers for that language. This effectively requires parsing to be a distinct layer that effectively enforces a boundary between raw input and internal data representations, instead of allowing parser code to be scattered throughout the program, where it could be subject to errors or inconsistencies that create weaknesses.
- Use an input validation framework such as Struts or the OWASP ESAPI Validation API. Note that using a framework does not automatically address all input validation problems; be mindful of weaknesses that could arise from misusing the framework itself (CWE-1173).
- Understand all the potential areas where untrusted inputs can enter the product, including but not limited to: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cert.vde.com/en/advisories/VDE-2022-018/Third Party Advisory
Other vulnerabilities in RAD-ISM-900-EN-BD/B
- 9.0 High severity
Recent Improper Input Validation vulnerabilities
- 7.8 High severity
- 9.1 Critical severity
- 7.2 High severity
- 7.2 High severity
- 7.5 High severity
- 8.8 High severity
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