DVP32ES2 PLC: Improper Resource Shutdown or Release
CVE-2023-5459 is a high-severity improper resource shutdown or release vulnerability in DVP32ES2 PLC from Delta Electronics, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected DVP32ES2 PLC versions: 1.48. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.07% chance of exploitation within 30 days, higher than 65% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of DVP32ES2 PLC you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Delta Electronics | DVP32ES2 PLC | 1.48 | Not stated |
| Deltaww | Dvp32es200r Firmware | 1.48 | Not stated |
| Deltaww | Dvp32es200t Firmware | 1.48 | Not stated |
| Deltaww | Dvp32es211t Firmware | 1.48 | Not stated |
| Deltaww | Dvp32es200rc Firmware | 1.48 | Not stated |
| Deltaww | Dvp32es200tc Firmware | 1.48 | Not stated |
| Deltaww | Dvp32es200re Firmware | 1.48 | Not stated |
| Deltaww | Dvp32es200te Firmware | 1.48 | 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
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.5 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 6.1 | Medium | CNA (vuldb.com) |
Official description
A vulnerability has been found in Delta Electronics DVP32ES2 PLC 1.48 and classified as critical. This vulnerability affects unknown code of the component Password Transmission Handler. The manipulation leads to denial of service. The exploit has been disclosed to the public and may be used. VDB-241582 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Resource Shutdown or Release
The product does not release or incorrectly releases a resource before it is made available for re-use.
How developers prevent this class of flaw
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.
- It is good practice to be responsible for freeing all resources you allocate and to be consistent with how and where you free memory in a function. If you allocate memory that you intend to free upon completion of the function, you must be sure to free the memory at all exit points for that function including error conditions.
- Memory should be allocated/freed using matching functions such as malloc/free, new/delete, and new[]/delete[].
More Improper Resource Shutdown or Release vulnerabilities (CWE-404)
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
Third-party and government advisories
- vuldb.com/?ctiid.241582Permissions Required, Third Party Advisory
- vuldb.com/?id.241582Third Party Advisory
Other references
- drive.google.com/drive/folders/1mUKkl_NPoUENpPUq-pdQQaEEGvKAaIFBPermissions Required
Recent Improper Resource Shutdown or Release vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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