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CVE-2023-32067

CVE-2023-32067 · 0-byte UDP payload DoS in c-ares

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

c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.

CVSS 7.5 · High · EPSS 1.6% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • c-ares

    Versions
    • < 1.19.1: Affected

    No fix published

  • c-ares Debian:12

    Affected ranges
    • ECOSYSTEM: < 1.18.1-3

    Update to 1.18.1-3

  • c-ares Debian:13

    Affected ranges
    • ECOSYSTEM: < 1.18.1-3

    Update to 1.18.1-3

  • c-ares Debian:14

    Affected ranges
    • ECOSYSTEM: < 1.18.1-3

    Update to 1.18.1-3

  • c-ares Ubuntu:Pro:16.04:LTS

    Versions
    • 1.10.0-2
    • 1.10.0-3
    • 1.10.0-3ubuntu0.1
    • 1.10.0-3ubuntu0.2
    • 1.10.0-3ubuntu0.2+esm1
    Affected ranges
    • ECOSYSTEM: < 1.10.0-3ubuntu0.2+esm2

    Update to 1.10.0-3ubuntu0.2+esm2

  • c-ares Ubuntu:Pro:18.04:LTS

    Versions
    • 1.13.0-2
    • 1.13.0-3
    • 1.14.0-1
    • 1.14.0-1ubuntu0.1
    • 1.14.0-1ubuntu0.2
    Affected ranges
    • ECOSYSTEM: < 1.14.0-1ubuntu0.2+esm1

    Update to 1.14.0-1ubuntu0.2+esm1

  • c-ares Ubuntu:20.04:LTS

    Versions
    • 1.15.0-1build1
    • 1.15.0-1ubuntu0.1
    • 1.15.0-1ubuntu0.2
    Affected ranges
    • ECOSYSTEM: < 1.15.0-1ubuntu0.3

    Update to 1.15.0-1ubuntu0.3

  • c-ares Ubuntu:22.04:LTS

    Versions
    • 1.17.1-1ubuntu1
    • 1.18.1-1
    • 1.18.1-1build1
    • 1.18.1-1ubuntu0.22.04.1
    Affected ranges
    • ECOSYSTEM: < 1.18.1-1ubuntu0.22.04.2

    Update to 1.18.1-1ubuntu0.22.04.2

Original sources

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