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Red Hat: CVE-2022-3924: sending specific queries to the resolver may cause a DoS (Multiple Advisories)

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Red Hat: CVE-2022-3924: sending specific queries to the resolver may cause a DoS (Multiple Advisories)



This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.


  • redhat-upgrade-bind
  • redhat-upgrade-bind-chroot
  • redhat-upgrade-bind-debuginfo
  • redhat-upgrade-bind-debugsource
  • redhat-upgrade-bind-devel
  • redhat-upgrade-bind-dnssec-doc
  • redhat-upgrade-bind-dnssec-utils
  • redhat-upgrade-bind-dnssec-utils-debuginfo
  • redhat-upgrade-bind-doc
  • redhat-upgrade-bind-libs
  • redhat-upgrade-bind-libs-debuginfo
  • redhat-upgrade-bind-license
  • redhat-upgrade-bind-utils
  • redhat-upgrade-bind-utils-debuginfo
  • redhat-upgrade-bind9-16
  • redhat-upgrade-bind9-16-chroot
  • redhat-upgrade-bind9-16-debuginfo
  • redhat-upgrade-bind9-16-debugsource
  • redhat-upgrade-bind9-16-devel
  • redhat-upgrade-bind9-16-dnssec-utils
  • redhat-upgrade-bind9-16-dnssec-utils-debuginfo
  • redhat-upgrade-bind9-16-doc
  • redhat-upgrade-bind9-16-libs
  • redhat-upgrade-bind9-16-libs-debuginfo
  • redhat-upgrade-bind9-16-license
  • redhat-upgrade-bind9-16-utils
  • redhat-upgrade-bind9-16-utils-debuginfo
  • redhat-upgrade-python3-bind
  • redhat-upgrade-python3-bind9-16

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