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dropbear vulnerabilities

Vulnerabilities published for dropbear in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerabilities: 2

  1. CVE-2026-3706

    Medium · CVSS 6.3EPSS 0.19%No fix published

    mkj Dropbear S Range Check curve25519.c unpackneg signature verification

    A vulnerability was determined in mkj Dropbear up to 2025.89. Impacted is the function unpackneg of the file src/curve25519.c of the component S Range Check. This manipulation causes improper verification of cryptographic signature. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. Patch name: fdec3c90a15447bd538641d85e5a3e3ac981011d. To fix this issue, it is recommended to deploy a patch. The project maintainer explains: "Signature Malleability is not exploitable in SSH protocol. (...) [A] PoC

    dropbearOperating systems
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  2. CVE-2023-48795

    Medium · CVSS 5.9EPSS 93.55%Public exploitNo fix published

    CVE-2023-48795

    The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with E

    dropbearOperating systems
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

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