Improper Input Validation Affecting unbound package, versions <1.6.7-1ubuntu2.1


Severity

Recommended
low

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    0.38% (74th percentile)

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  • Snyk ID SNYK-UBUNTU1804-UNBOUND-320277
  • published 23 Jan 2018
  • disclosed 23 Jan 2018

How to fix?

Upgrade Ubuntu:18.04 unbound to version 1.6.7-1ubuntu2.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream unbound package and not the unbound package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An improperly validated wildcard NSEC record could be used to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick unbound into accepting a NODATA proof.