regexp/syntax: limit memory used by parsing regexps
CVE: CVE-2022-41715
Component: golang
Severity: Moderate
CVSS v3: 6.7/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Release date: 2022-10-04T00:00:00+00:00

A flaw was found in the golang package, where programs that compile regular expressions from untrusted sources are vulnerable to memory exhaustion or a denial of service. The parsed regexp representation is linear in the input size. Still, in some cases, the constant factor can be as high as 40,000, making a relatively small regexp consume larger amounts of memory. After the fix, each regexp being parsed is limited to a 256 MB memory footprint. Regular expressions whose representation would use more space than that are rejected. Routine use of regular expressions is unaffected.

Statement: The opportunity for a Denial of Service is limited to the golang runtime. In the case of OpenShift Container Platform, this would be restricted within each individual container. There are multiple layers of guide rails (Golang’s Garbage Collector; OpenShift’s resource constraints imposed at the container and cluster levels) which would require a malicious user to continue submitting attacks for there to be any enduring impact. They would also need access to external server resources to be able to send a massive volume of requests to cause a significant impact on server operations.

Remediation:
Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
For details on how to install and use MTC, refer to:

https://docs.openshift.com/container-platform/latest/migration_toolkit_for_containers/installing-mtc.html
For OpenShift Container Platform 4.11 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 errata update:

https://docs.openshift.com/container-platform/4.11/release_notes/ocp-4-11-release-notes.html

For Red Hat OpenShift Logging 5.5, see the following instructions to apply this update:

https://docs.openshift.com/container-platform/4.11/logging/cluster-logging-upgrading.html
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
For OpenShift Container Platform 4.11 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/4.10/release_notes/ocp-4-10-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 sha256:01c9ef7f802f0ba254847c22e960cd6453ed9f61d9296fdda8bd497712f53e23
      
(For s390x architecture)
      The image digest is sha256:8e2adb075d0666881cbd360c679d9fdc893e797c64480bca8db50956a415105e
      
(For ppc64le architecture)
      The image digest is sha256:598ace9ac33904216a9506d81f6dd7d56e7ca66a7d849e43cb58304f8eb738ef
      
(For aarch64 architecture)
      The image digest is sha256:e4bb06fe2b63bf2776e529d97202ae7615bdee9811ce10a737052c11d8cd7e83

All OpenShift Container Platform 4.11 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 Console or the CLI oc command. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.11/updating/updating-cluster-cli.html
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

The system must be rebooted for this update to take effect.
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

Details on how to access this content are available at
https://docs.openshift.com/container-platform/4.12/updating/updating-cluster-cli.html
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
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, 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 sha256:4c5a7e26d707780be6466ddc9591865beb2e3baa5556432d23e8d57966a2dd18

(For s390x architecture)
The image digest is sha256:ab70750be4fadf5a525141ae32a8577c91dd19f1d6e582a6824339c938216ec0

(For ppc64le architecture)
The image digest is sha256:5a5943dea60b40f73ecee685b12fff1d65cc8bfe946f762fdfe862969483ddbb

(For aarch64 architecture)
The image digest is sha256:cb34667519d1cfd8eedf0fb27e14b7b7e6209323b86977bfaadf91da012d179d

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 Console
or the CLI oc command. Instructions for upgrading a cluster are available
at
https://docs.openshift.com/container-platform/4.12/updating/updating-cluster-cli.html
To update to the latest image please refer to the AMQ container images in the Red Hat Container catalog.
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
The Service Telemetry Framework container image provided by this update can be downloaded from the Red Hat Container Registry at registry.access.redhat.com. Installation instructions for your platform are available at Red Hat Container Catalog (see References).

Dockerfiles and scripts should be amended either to refer to this new image specifically, or to the latest image generally.
For details on how to apply this update, see Upgrade a Red Hat Ceph Storage
cluster using cephadm in the Red Hat Storage Ceph Upgrade
Guide.(https://access.redhat.com/documentation/en-us/red_hat_ceph_storage)
These updated images include numerous enhancements and bug fixes. Space precludes documenting all of these changes in this advisory. Users are directed to the Red Hat OpenShift Data Foundation Release Notes for information on the most significant of these changes:

https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.13/html/4.13_release_notes/index

All Red Hat OpenShift Data Foundation users are advised to upgrade to these updated images that provide numerous bug fixes and enhancements.
Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

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