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CVE-2026-63385

CVE-2026-63385 · Libevent: HTTP header handling bugs create risk of access control bypass.

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has two HTTP parsing weaknesses in http.c. evhttp_decode_uri_internal decodes percent-encoded %00 bytes into literal NUL characters, which can cause downstream C string operations to truncate a path and bypass validation performed on a different representation. evhttp_header_is_valid_value also accepts obsolete line folding in header values containing carriage return or line feed characters, allowing a proxy and libevent to interpret headers differently and enabling header injection or access control bypass. The CRLF header acceptance is fixed in versions 2.1.13 and 2.2.2-alpha, but the reviewed patches do not clearly remediate the URI NUL-truncation condition.

CVSS 9.2 · Crítica · EPSS 1,3% · Corrección disponible

Publicación
Actualización

Pila tecnológica: system

Productos y versiones afectados

  • libevent

    Versiones
    • >= 2.2.0-alpha, < 2.2.2-alpha: Afectada
    • < 2.1.13: Afectada

    Sin corrección publicada

  • libevent Debian:12

    Versiones
    • 2.1.12-stable-8
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.12-stable-8+deb12u1

    Actualiza a 2.1.12-stable-8+deb12u1

  • libevent Debian:13

    Versiones
    • 2.1.12-stable-10
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.13-stable-1~deb13u1

    Actualiza a 2.1.13-stable-1~deb13u1

  • libevent Debian:14

    Versiones
    • 2.1.12-stable-10
    • 2.1.13-stable-1~deb13u1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.13-stable-1

    Actualiza a 2.1.13-stable-1

  • libevent Ubuntu:Pro:14.04:LTS

    Versiones
    • 2.0.21-stable-1
    • 2.0.21-stable-1ubuntu1
    • 2.0.21-stable-1ubuntu1.14.04.1
    • 2.0.21-stable-1ubuntu1.14.04.2
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.0.21-stable-1ubuntu1.14.04.2+esm1

    Actualiza a 2.0.21-stable-1ubuntu1.14.04.2+esm1

  • libevent Ubuntu:Pro:16.04:LTS

    Versiones
    • 2.0.21-stable-2
    • 2.0.21-stable-2ubuntu0.16.04.1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.0.21-stable-2ubuntu0.16.04.1+esm1

    Actualiza a 2.0.21-stable-2ubuntu0.16.04.1+esm1

  • libevent Ubuntu:Pro:18.04:LTS

    Versiones
    • 2.1.8-stable-4
    • 2.1.8-stable-4build1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.8-stable-4ubuntu0.1~esm1

    Actualiza a 2.1.8-stable-4ubuntu0.1~esm1

  • libevent Ubuntu:Pro:20.04:LTS

    Versiones
    • 2.1.8-stable-4build1
    • 2.1.11-stable-1~exp0
    • 2.1.11-stable-1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.11-stable-1ubuntu0.1~esm1

    Actualiza a 2.1.11-stable-1ubuntu0.1~esm1

  • libevent Ubuntu:22.04:LTS

    Versiones
    • 2.1.12-stable-1
    • 2.1.12-stable-1build1
    • 2.1.12-stable-1build2
    • 2.1.12-stable-1build3
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.12-stable-1ubuntu0.1

    Actualiza a 2.1.12-stable-1ubuntu0.1

  • libevent Ubuntu:24.04:LTS

    Versiones
    • 2.1.12-stable-9
    • 2.1.12-stable-9ubuntu2
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.12-stable-9ubuntu2.1

    Actualiza a 2.1.12-stable-9ubuntu2.1

  • libevent Ubuntu:26.04:LTS

    Versiones
    • 2.1.12-stable-10build1
    • 2.1.12-stable-10build2
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.12-stable-10ubuntu0.1

    Actualiza a 2.1.12-stable-10ubuntu0.1

Fuentes originales

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