Memory Leak Affecting bind9 package, versions <1:9.18.1-1ubuntu1.2


Severity

Recommended
medium

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    0.45% (76th percentile)

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  • Snyk ID SNYK-UBUNTU2204-BIND9-3028457
  • published 21 Sep 2022
  • disclosed 21 Sep 2022

How to fix?

Upgrade Ubuntu:22.04 bind9 to version 1:9.18.1-1ubuntu1.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind9 package and not the bind9 package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

By spoofing the target resolver with responses that have a malformed EdDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.

CVSS Scores

version 3.1
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NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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SUSE

7.5 high
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Red Hat

7.5 high