Security readout for executives and security teams
Plain-English summary
Eclipse Hono 1.3.0 and 1.4.0 can be crashed through oversized AMQP device messages. A malicious or malformed AMQP client can ignore the advertised message-size limit and push the adapter toward an out-of-memory failure, disrupting message ingestion.
Executive priority
Prioritize this where Hono AMQP ingestion supports production IoT services. The likely business impact is service disruption rather than data theft, but exposed affected adapters can become an availability risk.
Technical view
The AMQP protocol adapter in Eclipse Hono 1.3.0 and 1.4.0 does not enforce the max-message-size it advertises during link establishment. Although AMQP 1.0 disallows oversized peer messages, a hand-crafted client can send an unbounded-size message, eventually causing an out-of-memory exception.
Likely exposure
Exposure is limited to deployments running Eclipse Hono 1.3.0 or 1.4.0 with the AMQP protocol adapter reachable by devices or clients.
Exploitation context
The source bundle does not show active exploitation, and the CVE is not listed as KEV. Public evidence describes a hand-crafted AMQP 1.0 client as the abuse path, but provides no exploitation-in-the-wild signal.
Researcher notes
Evidence is narrow but clear: affected versions are Hono 1.3.0 and 1.4.0, impact is AMQP adapter OOM, and the issue is input size validation. The bundle does not name a patch version or confirmed exploitation.
Mitigation direction
- Identify whether Eclipse Hono 1.3.0 or 1.4.0 is deployed.
- Check Eclipse Hono vendor guidance for fixed versions or supported remediation.
- Restrict AMQP adapter exposure to trusted device networks where possible.
- Monitor adapter memory use and unexpected restarts.
- Apply compensating message-size controls at gateways if supported.
Validation and detection
- Inventory Hono service versions and enabled protocol adapters.
- Confirm whether the AMQP adapter is externally reachable.
- Review logs for out-of-memory exceptions or adapter crashes.
- Verify configured upstream limits for AMQP message size.
- Confirm remediation against current Eclipse Hono guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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Open ATT&CK lookupCVE-2020-27217 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=567068CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Validation of Specified Quantity in Input
Improper Validation of Specified Quantity in Input represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.