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CVE-2025-46712

CVE-2025-46712 · Erlang/OTP SSH Has Strict KEX Violations

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25), Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to be exchanged. This allows a Man-in-the-Middle attacker to inject these messages in a connection during the handshake. This issue has been patched in versions OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25).

CVSS 3.7 · Low · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • erlang

    Versions
    • >= OTP 27.0, < OTP 27.3.4: Affected
    • >= OTP 26.2.1, < OTP 26.2.5.12: Affected
    • < OTP 25.3.2.21: Affected

    No fix published

  • erlang Debian:12

    Versions
    • 1:25.2.3+dfsg-1
    • 1:25.2.3+dfsg-1+deb12u1
    Affected ranges
    • ECOSYSTEM: < 1:25.2.3+dfsg-1+deb12u2

    Update to 1:25.2.3+dfsg-1+deb12u2

  • erlang Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:27.3.4+dfsg-1

    Update to 1:27.3.4+dfsg-1

  • erlang Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:27.3.4+dfsg-1

    Update to 1:27.3.4+dfsg-1

  • erlang Ubuntu:Pro:14.04:LTS

    Versions
    • 1:16.b.1-dfsg-4ubuntu1
    • 1:16.b.2-dfsg-1ubuntu1
    • 1:16.b.2-dfsg-2ubuntu1
    • 1:16.b.3-dfsg-1ubuntu1
    • 1:16.b.3-dfsg-1ubuntu2
    • 1:16.b.3-dfsg-1ubuntu2.1
    • 1:16.b.3-dfsg-1ubuntu2.2
    • 1:16.b.3-dfsg-1ubuntu2.2+esm1
    • 1:16.b.3-dfsg-1ubuntu2.2+esm2
    • 1:16.b.3-dfsg-1ubuntu2.2+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • erlang Ubuntu:Pro:16.04:LTS

    Versions
    • 1:18.0-dfsg-1ubuntu1
    • 1:18.0-dfsg-1ubuntu2
    • 1:18.2-dfsg-2ubuntu1
    • 1:18.3-dfsg-1ubuntu1
    • 1:18.3-dfsg-1ubuntu2
    • 1:18.3-dfsg-1ubuntu3
    • 1:18.3-dfsg-1ubuntu3.1
    • 1:18.3-dfsg-1ubuntu3.1+esm1
    • 1:18.3-dfsg-1ubuntu3.1+esm2
    • 1:18.3-dfsg-1ubuntu3.1+esm3
    • 1:18.3-dfsg-1ubuntu3.1+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • erlang Ubuntu:Pro:18.04:LTS

    Versions
    • 1:20.0.4+dfsg-1ubuntu1
    • 1:20.1.2+dfsg-1ubuntu1
    • 1:20.1.3+dfsg-1ubuntu1
    • 1:20.1.4+dfsg-1ubuntu1
    • 1:20.1.5+dfsg-1ubuntu1
    • 1:20.1.6+dfsg-1ubuntu1
    • 1:20.1.7+dfsg-1ubuntu1
    • 1:20.2.1+dfsg-1ubuntu1
    • 1:20.2.2+dfsg-1ubuntu1
    • 1:20.2.2+dfsg-1ubuntu2
    • 1:20.2.2+dfsg-1ubuntu2+esm1
    • 1:20.2.2+dfsg-1ubuntu2+esm2
    • 1:20.2.2+dfsg-1ubuntu2+esm3
    • 1:20.2.2+dfsg-1ubuntu2+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • erlang Ubuntu:Pro:20.04:LTS

    Versions
    • 1:22.0.7+dfsg-1build1
    • 1:22.2+dfsg-1
    • 1:22.2.1+dfsg-1
    • 1:22.2.2+dfsg-1
    • 1:22.2.3+dfsg-1
    • 1:22.2.3+dfsg-2
    • 1:22.2.4+dfsg-1
    • 1:22.2.7+dfsg-1
    • 1:22.2.7+dfsg-1ubuntu0.2
    • 1:22.2.7+dfsg-1ubuntu0.3
    • 1:22.2.7+dfsg-1ubuntu0.4
    • 1:22.2.7+dfsg-1ubuntu0.5
    • 1:22.2.7+dfsg-1ubuntu0.5+esm1
    • 1:22.2.7+dfsg-1ubuntu0.5+esm2
    • 1:22.2.7+dfsg-1ubuntu0.5+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • erlang Ubuntu:22.04:LTS

    Versions
    • 1:23.2.6+dfsg-1build1
    • 1:24.1.1+dfsg-1
    • 1:24.1.4+dfsg-1
    • 1:24.1.5+dfsg-1
    • 1:24.1.5+dfsg-1ubuntu1
    • 1:24.2+dfsg-1
    • 1:24.2.1+dfsg-1
    • 1:24.2.1+dfsg-1ubuntu0.1
    • 1:24.2.1+dfsg-1ubuntu0.2
    • 1:24.2.1+dfsg-1ubuntu0.3
    • 1:24.2.1+dfsg-1ubuntu0.4
    Affected ranges
    • ECOSYSTEM: < 1:24.2.1+dfsg-1ubuntu0.5

    Update to 1:24.2.1+dfsg-1ubuntu0.5

  • erlang Ubuntu:24.04:LTS

    Versions
    • 1:25.2.3+dfsg-1
    • 1:25.3.2.8+dfsg-1
    • 1:25.3.2.8+dfsg-1ubuntu1
    • 1:25.3.2.8+dfsg-1ubuntu3
    • 1:25.3.2.8+dfsg-1ubuntu4
    • 1:25.3.2.8+dfsg-1ubuntu4.1
    • 1:25.3.2.8+dfsg-1ubuntu4.2
    • 1:25.3.2.8+dfsg-1ubuntu4.3
    Affected ranges
    • ECOSYSTEM: < 1:25.3.2.8+dfsg-1ubuntu4.4

    Update to 1:25.3.2.8+dfsg-1ubuntu4.4

  • erlang Ubuntu:25.10

    Versions
    • 1:27.3+dfsg-1ubuntu1
    • 1:27.3+dfsg-1ubuntu1.1
    Affected ranges
    • ECOSYSTEM: < 1:27.3.4.1+dfsg-1

    Update to 1:27.3.4.1+dfsg-1

Original sources

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