CVE-2018-20378

Name: CVE-2018-20378
Creator: NVD / NIST
Published: 2019-03-29T15:29:00.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.26%

Last modified Jun 17, 2026

CVE-2018-20378 is a vulnerability of currently unknown severity. 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. EPSS estimates a 2.26% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

2.26%

80.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Opensynergy	Blue Sdk	>= 3.2, <= 5.5.3
Opensynergy	Blue Sdk	>= 6.0, < 6.0.1

References

https://www.cymotive.com/wp-content/uploads/2019/03/Hell2CAP-0day.pdfExploit, Third Party Advisory
https://www.opensynergy.com/news/security/bluesdk-advisory2018003/Vendor Advisory
https://www.cymotive.com/wp-content/uploads/2019/03/Hell2CAP-0day.pdfExploit, Third Party Advisory
https://www.opensynergy.com/news/security/bluesdk-advisory2018003/Vendor Advisory

Timeline

Published: Mar 29, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20378?

How severe is CVE-2018-20378?

Severity scoring for CVE-2018-20378 is pending analysis. The EPSS model estimates a 2.26% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20378?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20378?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST