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Allocation of Resources Without Limits or Throttling Affecting bind9 package, versions <1:9.9.5.dfsg-9+deb8u18

0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.23% (61st percentile)
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NVD
7.5 high
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Red Hat
8.6 high
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SUSE
7.5 high

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  • Snyk ID SNYK-DEBIAN8-BIND9-345304
  • published 26 Apr 2019
  • disclosed 9 Oct 2019
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Introduced: 26 Apr 2019

CVE-2018-5743 Open this link in a new tab
CWE-770 Open this link in a new tab

How to fix?

Upgrade Debian:8 bind9 to version 1:9.9.5.dfsg-9+deb8u18 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 Debian. See How to fix? for Debian:8 relevant fixed versions and status.

By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743.