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Resource Exhaustion Affecting bind-export-libs package, versions <32:9.11.13-5.el8_2

0.0
high

Snyk CVSS

    Attack Complexity Low
    Scope Changed
    Availability High

    Threat Intelligence

    EPSS 2.05% (89th percentile)
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NVD
8.6 high
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SUSE
8.6 high
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Red Hat
8.6 high

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  • Snyk ID SNYK-CENTOS8-BINDEXPORTLIBS-2041588
  • published 26 Jul 2021
  • disclosed 19 May 2020
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Introduced: 19 May 2020

CVE-2020-8616 Open this link in a new tab
CWE-400 Open this link in a new tab

How to fix?

Upgrade Centos:8 bind-export-libs to version 32:9.11.13-5.el8_2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind-export-libs package and not the bind-export-libs package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.

References