bind: SIG(0) can be used to exhaust CPU resources
CVE: CVE-2024-1975
Component: bind9
CWE: CWE-400
Severity: Important
CVSS v3: 7.5/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Release date: 2024-07-23T00:00:00+00:00

A flaw was found in the bind9 package, where if a DNS server hosts a zone containing a "KEY" resource record or a DNS resolver utilizes the DNSSEC validate feature to validate a "KEY" resource record, a malicious client could exhaust the CPU resourced from the resolver by sending a stream of SIG(0) signed requests. This issue can lead to a denial of service.

Statement: This vulnerability in the BIND9 package is classified as an important severity issue due to its potential to significantly disrupt DNS services, which are critical for internet functionality. The flaw allows a malicious client to exploit the DNSSEC validation process by sending a stream of SIG(0) signed requests, leading to CPU exhaustion on the resolver. This can cause a denial-of-service (DoS), rendering the DNS server unable to respond to legitimate queries. Given the widespread use of BIND9 in both enterprise and public DNS infrastructure, the impact of such an attack can be extensive, affecting numerous users and services reliant on DNS resolution.

Remediation:
For OpenShift Container Platform 4.12 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

      https://docs.openshift.com/container-platform/4.12/release_notes/ocp-4-12-release-notes.html

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

      The sha values for the release are

      (For x86_64 architecture)
      The image digest is sha256:9814dcb2e5fd5def12b0103feef3a7651f30b65c4259a8c1864a2f0d5dc5b1c6

      (For s390x architecture)
      The image digest is sha256:040dae16155ee888e8b9a91f00dc6fede262d2b8024dc1df949f0dc2480f0976

All OpenShift Container Platform 4.12 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.12/updating/updating-cluster-cli.html
For OpenShift Container Platform 4.13 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

      https://docs.openshift.com/container-platform/4.13/release_notes/ocp-4-13-release-notes.html

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

      The sha values for the release are

      (For x86_64 architecture)
      The image digest is sha256:ab6f574665395d809511db9dc57764358278538eaae248c6d199208b3c30ab7d

      (For s390x architecture)
      The image digest is sha256:5d0769628b09763b170b7be275971144dd74034da83b3d8d42ac24dba7b603f3

      (For ppc64le architecture)
      The image digest is sha256:b32a1b7910754ca0babb0ee4c7099e0cd74ed35a05820a64472ebcebdbe57b8c

      (For aarch64 architecture)
      The image digest is sha256:4714b66b8fb0ceeca59fb6a696db81559002261bd4a03e7d55c5a3b766e96242

All OpenShift Container Platform 4.13 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.13/updating/updating-cluster-cli.html
For OpenShift Container Platform 4.14 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

      https://docs.openshift.com/container-platform/4.14/release_notes/ocp-4-14-release-notes.html

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

      The sha values for the release are

      (For x86_64 architecture)
      The image digest is sha256:4bc4925e8028158e3f313aa83e59e181c94d88b4aa82a3b00202d6f354e8dfed

      (For s390x architecture)
      The image digest is sha256:788a7a0fd2d808d1107d7ffc6731f799bdb8a41ac01ffab2afdbcb83b3390ffa

      (For ppc64le architecture)
      The image digest is sha256:f5c4474b162b3be7f693c51572d21dc5b1c8e14861049f2c426f4cce0a6bb4d8

      (For aarch64 architecture)
      The image digest is sha256:0bad0cf89c81b99f44e8db697ff63c8b1acf973dc57cf138eadfd7708844027e

All OpenShift Container Platform 4.14 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.14/updating/updating_a_cluster/updating-cluster-cli.html
For OpenShift Container Platform 4.15 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

      https://docs.openshift.com/container-platform/4.15/release_notes/ocp-4-15-release-notes.html

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

      The sha values for the release are

      (For x86_64 architecture)
      The image digest is sha256:29d88fadd452261fc8a0bbbb5d920a7fe5b8b7a0050f673a7c47059f03daef28

      (For s390x architecture)
      The image digest is sha256:59557a8caba9c7f7e1fe4b39545d1aa33d12ed9e6b4ff1f118b0ae16087ac577

      (For ppc64le architecture)
      The image digest is sha256:890a9bc6f7f9c65e6d98d677085228b462a00c096afd08082f4a7f56441679bc

      (For aarch64 architecture)
      The image digest is sha256:7dd6c863983390d4a975c7a01ce12eabbe1bed9fee07d36faa000e98f3cc9e73

All OpenShift Container Platform 4.15 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.15/updating/updating_a_cluster/updating-cluster-cli.html
For OpenShift Container Platform 4.16 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

      https://docs.openshift.com/container-platform/4.16/release_notes/ocp-4-16-release-notes.html

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

      The sha values for the release are

      (For x86_64 architecture)
      The image digest is sha256:793bac91943944692d72a61c47a3102edb70fb2948cdf54019f06376a87298ad

      (For s390x architecture)
      The image digest is sha256:925fb39b1c42a1b59aeb91cd3c12b4ca6f358459914809381fd6d7def577abdb

      (For ppc64le architecture)
      The image digest is sha256:a46a00e18fb14fe10a00bd87d579e0229b4aed46dd66b5f93d6e161164660d61

      (For aarch64 architecture)
      The image digest is sha256:9f20082482f4b82e3c39bfcd3eb7be7d0a1f5171cc22e6af42ae2df6ad1d74ad

All OpenShift Container Platform 4.16 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.16/updating/updating_a_cluster/updating-cluster-cli.html
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.