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Security Policy

Reporting a Vulnerability

To report a Security issue, you can :

For more details, please look at :

Supported Versions

Only Leshan library is concerned. The demos are not covered.

Version Supported
2.x ✔️
1.x ✔️

Note: ℹ️ 1.x version depends on californium 2.x version where support is not clear.
See : https://github.com/eclipse/californium/security/policy

About Leshan Demo

As said previously Leshan demos are not covered by Security Policy.

It is strongly discouraged to use Leshan demos v1.x on public server because they are using no longer maintained javascript/java library like :

  • bootstrap.js (pkg:javascript/bootstrap@3.4.1) : Bootstrap before 4.0.0 is end-of-life and no longer maintained.
  • jquery-2.2.4.js (pkg:javascript/jquery@2.2.4) : CVE-2015-9251, CVE-2019-11358, CVE-2020-11022, CVE-2020-11023, jQuery 1.x and 2.x are End-of-Life and no longer receiving security updates
  • Jetty 9.x : Jetty 9.4 reach End-of-Life and no longer receiving security updates at January 2025.

Concerning Leshan demos v2.x, some minimal efforts are made to update dependencies when vulnerabilities are detected but keep in mind that demos are not production ready tools.

Versions Security State

List of version which are not affected by known vulnerability.

Version
2.0.0-M13 + ✔️
1.5.0 + ✔️

This is an exhaustive list of known security issue affecting leshan library :

CVE/ID Leshan version concerned artifacts Affect
CVE-2023-41034
GHSA-wc9j-gc65-3cm7		 2.0.0-M1 -> 2.0.0-M12
1.0.0 -> 1.4.2		 leshan-lwm2m-core if you parse untrusted DDF files
(e.g. if they let external users provide their own model),

This is a not exhaustive list of security issue from Leshan dependencies which could affect Leshan :

CVE/ID Leshan version concerned Source Affect
CVE-2022-39368 2.0.0-M1 -> 2.0.0-M8
1.0.0 -> 1.4.1		 californium/scandium any DTLS usage
CVE-2022-2576 2.0.0-M1 -> 2.0.0-M7
1.0.0 -> 1.4.0		 californium/scandium DTLSVERIFY_PEERS ON_RESUMPTION_THRESHOLD > 0
GHSA-fj2w-wfgv-mwq6 2.0.0-M2 -> 2.0.0-M4 com.upokecenter.cbor CBOR or SenML-CBOR decoding
CVE-2020-27222 1.1.0 -> 1.3.1 californium/scandium DTLS with x509 and/or RPK
CVE-2021-34433 2.0.0-M1 -> 2.0.0-M4
1.0.0 -> 1.3.1		 californium/scandium DTLS with x509 and/or RPK

Note: We strongly encourage you to switch last safe Leshan version, but for vulnerability caused by a dependency :

  • if there isn't Leshan release available OR if you want to be very conservative
  • AND the concerned library is using semantic versioning

then you could try to just update the dependency to a safe compatible version without upgrading Leshan.

Runtime Security State

This is a not exhaustive list of JVM security issue which could affect common Leshan usages.

Dependency Affected Version Usage Vulnerability More Information
JDK / JCE <= 15.0.2?
<= 16.0.2?
< 17.0.3
< 18.0.1		 Cipher Suite based on ECDSA ECDSA CVE-2022-21449 #1243