FOXMAN-UN: Improper Certificate Validation
CVE-2024-28021 is a high-severity improper certificate validation vulnerability in FOXMAN-UN from Hitachi Energy, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected FOXMAN-UN versions: FOXMAN-UN R16B PC2; FOXMAN-UN R15B PC4. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.27% 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 FOXMAN-UN you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on publisher.hitachienergy.com for workarounds and exact fixed builds.
- 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 |
|---|---|---|---|
| Hitachi Energy | FOXMAN-UN | FOXMAN-UN R16B PC2; FOXMAN-UN R15B PC4 | Not stated |
| Hitachi Energy | UNEM | UNEM R16B PC2; UNEM R15B PC4 | Not stated |
| Hitachienergy | unem | r16bpc2; r15bpc4 | Not stated |
| Hitachienergy | foxman-un | r16bpc2; r15bpc4 | 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
- HighSuccess depends on conditions outside the attacker's control.
- 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
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.4 | High | CNA (hitachienergy.com) |
| CVSS 3.1 | 7.4 | High | NVD |
Official description
A vulnerability exists in the FOXMAN-UN/UNEM server that affects the message queueing mechanism’s certificate validation. If exploited an attacker could spoof a trusted entity causing a loss of confidentiality and integrity.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
How developers prevent this class of flaw
- Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
More Improper Certificate Validation vulnerabilities (CWE-295)
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 FOXMAN-UN
- 8.0 High severity
- 10.0 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Improper Certificate Validation vulnerabilities
- 7.8 High severity
- 8.2 High severity
- 8.8 High severity
- 7.8 High severity
- 8.8 High severity
- 9.8 Critical severity
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