XML Entity Expansion
CVE: CVE-2024-28757
Component: expat
CWE: CWE-776
Severity: Moderate
CVSS v3: 7.5/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Release date: 2024-03-10T00:00:00+00:00

An XML Entity Expansion flaw was found in libexpat. This flaw allows an attacker to cause a denial of service when there is an isolated use of external parsers.

Statement: This vulnerability is rated as a moderate severity because a flaw was found in the libexpat library in the xmlparse.c file, specifically in the handling of external parsers. The issue is an XML Entity Expansion flaw caused by the parser's failure to detect direct recursion when a parameter entity references itself in an external subset. An attacker can trigger this by submitting a specially crafted XML document, which creates an infinite processing loop, leading to uncontrolled resource consumption and causing a denial of service (DoS).

Remediation:
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.redhat.com/en/documentation/openshift_container_platform/4.15/html/release_notes/

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 as follows:

      (For x86_64 architecture)
      The image digest is sha256:0301752d0cbc1d62336f5c467be4b63947e882750760243f513da5c6c003289e

      (For s390x architecture)
      The image digest is sha256:92ae7546248ac2341469a7bd801569e225bfab6177fae12a1aa90c990e96459b

      (For ppc64le architecture)
      The image digest is sha256:ba40e267f4ff9a6150513e3b2411032cbedbe4ffc0bed012f17675e5a40d473e

      (For aarch64 architecture)
      The image digest is sha256:a780ba0cb96fe8e52708f989caf17a7aebc38142cc43aec45d063e5520190761

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.redhat.com/en/documentation/openshift_container_platform/4.15/html-single/updating_clusters/index#updating-cluster-cli.
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.redhat.com/en/documentation/openshift_container_platform/4.16/html/release_notes/

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 as follows:

      (For x86_64 architecture)
      The image digest is sha256:c9e3973d54f71b4ff23c397b645a51cd47c010d103e921630bda5028d04ff3d8

      (For s390x architecture)
      The image digest is sha256:1aa9016d22c8d1583a551c6781e08edebf28fab83fa9260a2004bcb0632dc6bf

      (For ppc64le architecture)
      The image digest is sha256:ac6b3774ae09bc158fe6cecf4da0eb365197a61d3bf51ee1adfbe91ded39f3ea

      (For aarch64 architecture)
      The image digest is sha256:eead1994f8221d432dffa6441cc42390a6c7dafe4d1e38cb85c6c14d50f91317

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.redhat.com/en/documentation/openshift_container_platform/4.16/html-single/updating_clusters/index#updating-cluster-cli.
For OpenShift Container Platform 4.17 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.redhat.com/en/documentation/openshift_container_platform/4.17/html/release_notes/

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 as follows:

      (For x86_64 architecture)
      The image digest is sha256:75dc5b2eeb18f5e46a7546e7206a6cb485971d77ca66cd34390f55c0d147ea89

      (For s390x architecture)
      The image digest is sha256:68d213f51730607777fb492cd3b5d32fb58e8da880273d83f9d3046336584a09

      (For ppc64le architecture)
      The image digest is sha256:f66cc69569c4af877c2fa74469c8f2f51e390088ef63bb38db55991b15075834

      (For aarch64 architecture)
      The image digest is sha256:a623aa7ff677656407ae0b361fcff72b11fae6c580bda6714266a00a0f90f889

All OpenShift Container Platform 4.17 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.redhat.com/en/documentation/openshift_container_platform/4.17/html-single/updating_clusters/index#updating-cluster-cli.
For OpenShift Container Platform 4.18 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.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/

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 as follows:

      (For x86_64 architecture)
      The image digest is sha256:59727c4b3fef19e5149675cf3350735bbfe2c6588a57654b2e4552dd719f58b1

      (For s390x architecture)
      The image digest is sha256:990383bd551e781327ce7972144fc0c9a614c048d7ccbde562548e07f85192b3

      (For ppc64le architecture)
      The image digest is sha256:5e284927ceb1b59b986ac80acf1e4d097b09587f0751c65c5488c2c29dd51d8c

      (For aarch64 architecture)
      The image digest is sha256:0a43bf979ac93078a64c99f078b6097634920909f9acbaa18d494b7203b33a52

All OpenShift Container Platform 4.18 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.redhat.com/en/documentation/openshift_container_platform/4.18/html-single/updating_clusters/index#updating-cluster-cli.
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, applications using the Expat library must be restarted for the update to take effect.
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, applications using the Expat library must be restarted for the update to take effect.
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, applications using the Expat library must be restarted for the update to take effect.