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CVE Record

CVE-2018-20378: The L2CAP signaling channel implementation and SDP server implementation in OpenSynergy Blue SDK 3.2 throug...

The L2CAP signaling channel implementation and SDP server implementation in OpenSynergy Blue SDK 3.2 through 6.0 allow remote, unauthenticated attackers to execute arbitrary code or cause a denial of service via malicious L2CAP configuration requests, in conjunction with crafted SDP communication over maliciously configured L2CAP channels. The attacker must have connectivity over the Bluetooth physical layer, and must be able to send raw L2CAP frames. This is related to L2Cap_HandleConfigReq in core/stack/l2cap/l2cap_sm.c and SdpServHandleServiceSearchAttribReq in core/stack/sdp/sdpserv.c.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-20378 affects OpenSynergy Blue SDK versions 3.2 through 6.0. A nearby unauthenticated Bluetooth attacker able to send raw L2CAP frames could trigger arbitrary code execution or denial of service. Business urgency depends on whether products or embedded systems use this SDK and expose Bluetooth.

Executive priority

Treat this as a high-priority inventory and vendor-remediation issue for Bluetooth-enabled products. The strongest business risk is unmanaged embedded exposure: affected systems may not be obvious from normal IT asset lists, and no patch details are present in the source bundle.

Technical view

The issue involves L2CAP signaling channel handling and the SDP server in OpenSynergy Blue SDK. Malicious L2CAP configuration requests combined with crafted SDP communication over configured L2CAP channels can affect L2Cap_HandleConfigReq and SdpServHandleServiceSearchAttribReq. The source bundle does not provide CVSS, CWE, or fixed-version details.

Likely exposure

Exposure is most likely in embedded, automotive, or IoT products that incorporated OpenSynergy Blue SDK 3.2 through 6.0 and have Bluetooth enabled. The attacker needs Bluetooth physical-layer connectivity and raw L2CAP frame capability, so exposure is proximity-limited but still operationally significant.

Exploitation context

The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation. The attack is remote over Bluetooth but constrained by physical proximity and raw L2CAP access. Public references include a research PDF and an OpenSynergy advisory.

Researcher notes

Evidence supports potential code execution or denial of service, but public scoring and affected-product mapping are incomplete in the supplied data. Avoid assuming specific downstream vendors are affected unless SDK use is confirmed. Validation should focus on provenance, Bluetooth exposure, and vendor advisory status.

Mitigation direction

  • Inventory products and firmware for OpenSynergy Blue SDK 3.2 through 6.0 usage.
  • Check OpenSynergy advisory 2018003 and product vendor guidance for fixes.
  • Apply vendor firmware or SDK updates when identified by the vendor.
  • Disable or restrict Bluetooth where it is not operationally required.
  • Increase monitoring for unexpected Bluetooth resets or availability issues.

Validation and detection

  • Confirm whether affected systems include OpenSynergy Blue SDK versions 3.2 through 6.0.
  • Review SBOMs, firmware release notes, or vendor attestations for Blue SDK provenance.
  • Identify devices with enabled Bluetooth L2CAP and SDP functionality.
  • Verify whether vendors have issued patched firmware or compensating guidance.
  • Document systems where Bluetooth cannot be disabled or updated.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-20378 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.