RTU500 series CMU firmware: Unrestricted Upload of File with Dangerous Type
CVE-2024-1531 is a high-severity unrestricted upload of file with dangerous type vulnerability in RTU500 series CMU firmware from Hitachi Energy, with a CVSS 3.1 base score of 8.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected RTU500 series CMU firmware versions: 12.0.1 through 12.0.14; 12.2.1 through 12.2.11; 12.4.1 through 12.4.11, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.45% 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 RTU500 series CMU firmware you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Hitachi Energy | RTU500 series CMU firmware | 12.0.1 through 12.0.14; 12.2.1 through 12.2.11; 12.4.1 through 12.4.11; 12.6.1 through 12.6.9; 12.7.1 through 12.7.6; 13.2.1 through 13.2.6; 13.4.1 through 13.4.4; 13.5.1 through 13.5.3 | 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
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- LowSome restricted data can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:H. Scored by CNA (hitachienergy.com).
Official description
A vulnerability exists in the stb-language file handling that affects the RTU500 series product versions listed below. A malicious actor could print random memory content in the RTU500 system log, if an authorized user uploads a specially crafted stb-language file.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Unrestricted Upload of File with Dangerous Type
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
How developers prevent this class of flaw
- Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.
- When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
- Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically.
More Unrestricted Upload of File with Dangerous Type vulnerabilities (CWE-434)
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 references
Other vulnerabilities in RTU500 series CMU firmware
- 9.1 Critical severity
- 9.1 Critical severity
- 7.5 High severity
- 7.2 High severity
- 7.5 High severity
- 7.5 High severity
Recent Unrestricted Upload of File with Dangerous Type vulnerabilities
- 9.8 Critical severity
- 8.8 High severity
- 8.0 High severity
- 7.2 High severity
- 9.1 Critical severity
- 10.0 Critical severity
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