eclipse-tinydtls

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• `dtls_get_cookie`: dereference before the length check (currently masked by `dtls_create_cookie`)

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  Difficulty 2/5 1-3 hours Newbie friendliness 68/100

  eclipse-tinydtls/tinydtls#279 · 2 comments · 1 reaction · Opened Aug 11, 2026

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• `MASK_L` over-shifts for RFC 3610-legal `L ≥ 4`, collapsing the CCM counter (keystream reuse at `L = 4`)

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  Difficulty 2/5 1-3 hours Newbie friendliness 57/100

  eclipse-tinydtls/tinydtls#278 · 3 comments · 1 reaction · Opened Aug 11, 2026

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• ECDSA Verification Without On-Curve Check

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  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  eclipse-tinydtls/tinydtls#274 · 2 comments · Opened Jun 23, 2026

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• tinydtls Unbounded Handshake Reorder Queue DoS

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  eclipse-tinydtls/tinydtls#273 · 2 comments · Opened Jun 23, 2026

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• tinydtls `dtls_update_parameters` Assert-Only Length Guard

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  Difficulty 3/5 Half a day Newbie friendliness 48/100

  eclipse-tinydtls/tinydtls#272 · 1 comment · Opened Jun 23, 2026

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• DTLS 1.2 (RFC 6347) Compliance Observations in tinydtls

  May be free again @boaks claimed this 178 days ago, and no pull request is open. Open

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  bug good first issue

  eclipse-tinydtls/tinydtls#268 · 2 comments · 1 reaction · 1 assignee · Opened Apr 17, 2026

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• New tag / version

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  eclipse-tinydtls/tinydtls#261 · 6 comments · 1 reaction · Opened Aug 8, 2025

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• (Non-conformance) Stateless Cookie Exchange

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  eclipse-tinydtls/tinydtls#259 · 2 comments · Opened May 15, 2025

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• (Non-conformance) Wrapping of Record Sequence Number

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  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  eclipse-tinydtls/tinydtls#258 · 1 comment · Opened May 15, 2025

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• Experiencing an extended handshake duration on a SAMR21-xpro device.

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  Difficulty 5/5 Over a week Newbie friendliness 20/100

  eclipse-tinydtls/tinydtls#224 · 17 comments · Opened Feb 8, 2024

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• RFC7250 - RawPublicKey - No Suitable Certificate?

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  eclipse-tinydtls/tinydtls#186 · 1 comment · Opened Jan 25, 2023

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• Issues for general cleanup?

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  question

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  eclipse-tinydtls/tinydtls#143 · 25 comments · 2 reactions · Opened May 26, 2022

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• 32bit overflow does not work

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  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  eclipse-tinydtls/tinydtls#125 · 9 comments · Opened Feb 7, 2022

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• Fuzzing Hello_Extensions?

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  Difficulty 4/5 3-5 days Newbie friendliness 20/100

  eclipse-tinydtls/tinydtls#65 · 1 comment · 1 reaction · Opened Mar 26, 2021

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• Contact information to report a serious security vulnerablity

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  Difficulty 4/5 3-5 days Newbie friendliness 15/100

  eclipse-tinydtls/tinydtls#43 · 2 comments · Opened Jul 16, 2020

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• Support for dtls connection id extension?

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  Difficulty 5/5 Over a week Newbie friendliness 15/100

  eclipse-tinydtls/tinydtls#27 · 17 comments · Opened Mar 31, 2020

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• Using retransmission timer

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  eclipse-tinydtls/tinydtls#26 · 2 comments · Opened Jan 15, 2020

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• ECDHE_ECDSA ClientKeyExchange rejected as too short when DTLS_PSK_MAX_CLIENT_IDENTITY_LEN > 64

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  bug good first issue please retest

  Difficulty 2/5 1-3 hours Newbie friendliness 76/100

  eclipse-tinydtls/tinydtls#298 · 2 comments · Opened Oct 12, 2026

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• MSVC build is broken (undeclared `DTLS_DEBUG_BUF_SIZE`)

  Possibly taken @mrdeep1 claimed this 9 days ago. Open

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  Difficulty 2/5 1-3 hours Newbie friendliness 25/100

  eclipse-tinydtls/tinydtls#283 · 5 comments · Opened Sep 4, 2026

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• Server DoS vulnerability via malformed handshake sequence

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  bug

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  eclipse-tinydtls/tinydtls#244 · 9 comments · Opened Jan 10, 2025

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