Allocation of Resources Without Limits or Throttling Affecting bind package, versions <9.11.2-12.11.2


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.21% (59th percentile)

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  • Snyk IDSNYK-SLES151-BIND-2749995
  • published14 Apr 2022
  • disclosed3 Jun 2019

Introduced: 3 Jun 2019

CVE-2018-5743  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade SLES:15.1 bind to version 9.11.2-12.11.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind package and not the bind package as distributed by SLES. See How to fix? for SLES:15.1 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.

CVSS Scores

version 3.1