Energy Management Controller with Cloud Services: Server-Side Request Forgery
CVE-2024-23788 is a high-severity server-side request forgery vulnerability in Energy Management Controller with Cloud Services from Sharp, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists versions jh-rvb1_ver.b0.1.9.1, jh-rv11_ver.b0.1.9.1 as the first without the flaw, so updating Energy Management Controller with Cloud Services to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.81% chance of exploitation within 30 days, higher than 57% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Energy Management Controller with Cloud Services to jh-rvb1_ver.b0.1.9.1 or jh-rv11_ver.b0.1.9.1, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SHARP | Energy Management Controller with Cloud Services | JH-RVB1 Ver.B0.1.9.1 and earlier; JH-RV11 Ver.B0.1.9.1 and earlier; before jh-rvb1_ver.b0.1.9.1; before jh-rv11_ver.b0.1.9.1 | jh-rvb1_ver.b0.1.9.1, jh-rv11_ver.b0.1.9.1 |
| Sharp | Jh-rvb1 Firmware | b0.1.9.1 and earlier | Not stated |
| Sharp | Jh-rv11 Firmware | b0.1.9.1 and earlier | 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
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.1 | High | NVD |
| CVSS 3.1 | 9.1 | Critical | CISA (ADP) |
Official description
Server-side request forgery vulnerability in Energy Management Controller with Cloud Services JH-RVB1 /JH-RV11 Ver.B0.1.9.1 and earlier allows a network-adjacent unauthenticated attacker to send an arbitrary HTTP request (GET) from the affected product.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Server-Side Request Forgery
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
How developers prevent this class of flaw
- If there is a known list of applications, IP, hostname, and/or domains to which the product is allowed to communicate, then use allowlists to ensure that outgoing requests are restricted to these known entities. The allowlists could be in the application code or possibly enforced by firewalls or network segmentation.
- If the product is expected to be able to connect to arbitrary IP addresses or domains, consider using a denylist that includes private network addresses, internal domain names, etc. The denylist could be in the application code or possibly enforced by firewalls or network segmentation.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- jp.sharp/support/taiyo/info/JVNVU94591337_en.pdfThird Party Advisory
- jp.sharp/support/taiyo/info/JVNVU94591337_jp.pdfThird Party Advisory
- jvn.jp/en/vu/JVNVU94591337/Third Party Advisory
Other vulnerabilities in Energy Management Controller with Cloud Services
- 8.8 High severity
- 9.3 Critical severity
- 8.8 High severity
Recent Server-Side Request Forgery vulnerabilities
- 9.8 Critical severity
- 7.3 High severity
- 8.2 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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