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CVE-2020-25681

CVE-2020-25681

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

A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 8.1 · High · EPSS 84.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • dnsmasq

    Versions
    • dnsmasq 2.83: Affected

    No fix published

  • dnsmasq Debian:12

    Affected ranges
    • ECOSYSTEM: < 2.83-1

    Update to 2.83-1

  • dnsmasq Debian:13

    Affected ranges
    • ECOSYSTEM: < 2.83-1

    Update to 2.83-1

  • dnsmasq Debian:14

    Affected ranges
    • ECOSYSTEM: < 2.83-1

    Update to 2.83-1

  • dnsmasq Ubuntu:16.04:LTS

    Versions
    • 2.75-1
    • 2.75-1ubuntu0.16.04.1
    • 2.75-1ubuntu0.16.04.2
    • 2.75-1ubuntu0.16.04.3
    • 2.75-1ubuntu0.16.04.4
    • 2.75-1ubuntu0.16.04.5
    Affected ranges
    • ECOSYSTEM: < 2.75-1ubuntu0.16.04.7

    Update to 2.75-1ubuntu0.16.04.7

  • dnsmasq Ubuntu:18.04:LTS

    Versions
    • 2.78-1
    • 2.78-3
    • 2.79-1
    Affected ranges
    • ECOSYSTEM: < 2.79-1ubuntu0.2

    Update to 2.79-1ubuntu0.2

  • dnsmasq Ubuntu:20.04:LTS

    Versions
    • 2.80-1ubuntu2
    • 2.80-1ubuntu4
    • 2.80-1.1ubuntu1
    Affected ranges
    • ECOSYSTEM: < 2.80-1.1ubuntu1.2

    Update to 2.80-1.1ubuntu1.2

Original sources

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