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CVE-2024-8508

CVE-2024-8508 · Unbounded name compression could lead to Denial of Service

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

NLnet Labs Unbound up to and including version 1.21.0 contains a vulnerability when handling replies with very large RRsets that it needs to perform name compression for. Malicious upstreams responses with very large RRsets can cause Unbound to spend a considerable time applying name compression to downstream replies. This can lead to degraded performance and eventually denial of service in well orchestrated attacks. The vulnerability can be exploited by a malicious actor querying Unbound for the specially crafted contents of a malicious zone with very large RRsets. Before Unbound replies to the query it will try to apply name compression which was an unbounded operation that could lock the CPU until the whole packet was complete. Unbound version 1.21.1 introduces a hard limit on the number of name compression calculations it is willing to do per packet. Packets that need more compression will result in semi-compressed packets or truncated packets, even on TCP for huge messages, to avoid locking the CPU for long. This change should not affect normal DNS traffic.

CVSS 5.3 · Media · EPSS 0,8% · Corrección disponible

Publicación
Actualización

Pila tecnológica: system

Productos y versiones afectados

  • unbound

    Versiones
    • ≥ 0, ≤ 1.21.0: Afectada (semver)

    Sin corrección publicada

  • unbound Debian:12

    Versiones
    • 1.17.1-2
    • 1.17.1-2+deb12u1
    • 1.17.1-2+deb12u2
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.17.1-2+deb12u3

    Actualiza a 1.17.1-2+deb12u3

  • unbound Debian:13

    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.21.1-1

    Actualiza a 1.21.1-1

  • unbound Debian:14

    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.21.1-1

    Actualiza a 1.21.1-1

  • unbound Ubuntu:Pro:14.04:LTS

    Versiones
    • 1.4.20-1
    • 1.4.21-1
    • 1.4.21-1ubuntu1
    • 1.4.21-1ubuntu2
    • 1.4.22-1ubuntu1
    • 1.4.22-1ubuntu2
    • 1.4.22-1ubuntu3
    • 1.4.22-1ubuntu4
    • 1.4.22-1ubuntu4.14.04.1
    • 1.4.22-1ubuntu4.14.04.2
    • 1.4.22-1ubuntu4.14.04.3
    • 1.4.22-1ubuntu4.14.04.3+esm1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.4.22-1ubuntu4.14.04.3+esm2

    Actualiza a 1.4.22-1ubuntu4.14.04.3+esm2

  • unbound Ubuntu:Pro:16.04:LTS

    Versiones
    • 1.4.22-1ubuntu6
    • 1.5.7-1ubuntu1
    • 1.5.7-1ubuntu2
    • 1.5.8-1ubuntu1
    • 1.5.8-1ubuntu1.1
    • 1.5.8-1ubuntu1.1+esm1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.5.8-1ubuntu1.1+esm2

    Actualiza a 1.5.8-1ubuntu1.1+esm2

  • unbound Ubuntu:Pro:18.04:LTS

    Versiones
    • 1.6.5-1
    • 1.6.7-1
    • 1.6.7-1build1
    • 1.6.7-1ubuntu1
    • 1.6.7-1ubuntu2
    • 1.6.7-1ubuntu2.1
    • 1.6.7-1ubuntu2.2
    • 1.6.7-1ubuntu2.3
    • 1.6.7-1ubuntu2.4
    • 1.6.7-1ubuntu2.5
    • 1.6.7-1ubuntu2.6
    • 1.6.7-1ubuntu2.6+esm2
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.6.7-1ubuntu2.6+esm3

    Actualiza a 1.6.7-1ubuntu2.6+esm3

  • unbound Ubuntu:20.04:LTS

    Versiones
    • 1.9.0-2ubuntu1
    • 1.9.0-2ubuntu2
    • 1.9.4-2
    • 1.9.4-2ubuntu1
    • 1.9.4-2ubuntu1.1
    • 1.9.4-2ubuntu1.2
    • 1.9.4-2ubuntu1.3
    • 1.9.4-2ubuntu1.4
    • 1.9.4-2ubuntu1.5
    • 1.9.4-2ubuntu1.6
    • 1.9.4-2ubuntu1.8
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.9.4-2ubuntu1.9

    Actualiza a 1.9.4-2ubuntu1.9

  • unbound Ubuntu:22.04:LTS

    Versiones
    • 1.13.1-1ubuntu1
    • 1.13.1-1ubuntu3
    • 1.13.1-1ubuntu5
    • 1.13.1-1ubuntu5.1
    • 1.13.1-1ubuntu5.2
    • 1.13.1-1ubuntu5.3
    • 1.13.1-1ubuntu5.4
    • 1.13.1-1ubuntu5.5
    • 1.13.1-1ubuntu5.7
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.13.1-1ubuntu5.8

    Actualiza a 1.13.1-1ubuntu5.8

  • unbound Ubuntu:24.04:LTS

    Versiones
    • 1.17.1-2
    • 1.18.0-2ubuntu1
    • 1.18.0-2ubuntu2
    • 1.19.1-1ubuntu1
    • 1.19.2-1ubuntu1
    • 1.19.2-1ubuntu3
    • 1.19.2-1ubuntu3.1
    • 1.19.2-1ubuntu3.2
    Intervalos de versiones afectados
    • ECOSYSTEM: < 1.19.2-1ubuntu3.3

    Actualiza a 1.19.2-1ubuntu3.3

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