RHSA-2021:4827 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 3.11.569 is now available with updates to packages and images that fix several bugs and add enhancements.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments.

Security Fix(es):

• jenkins-2-plugins/subversion: does not restrict the name of a file when looking up a subversion key (CVE-2021-21698)
• jenkins: FilePath#mkdirs does not check permission to create parent directories (CVE-2021-21685)
• jenkins: File path filters do not canonicalize paths, allowing operations

to follow symbolic links to outside allowed directories (CVE-2021-21686)

• jenkins: FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic link (CVE-2021-21687)
• jenkins: FilePath#reading(FileVisitor) does not reject any operations allowing users to have unrestricted read access (CVE-2021-21688)
• jenkins: FilePath#unzip and FilePath#untar were not subject to any access control (CVE-2021-21689)
• jenkins: Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path

(CVE-2021-21690)

• jenkins: Creating symbolic links is possible without the symlink permission (CVE-2021-21691)
• jenkins: The operations FilePath#renameTo and FilePath#moveAllChildrenTo only check read permission on the source path (CVE-2021-21692)
• jenkins: When creating temporary files, permission to create files is only checked after they’ve been created. (CVE-2021-21693)
• jenkins: FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and FilePath#get*DiskSpace do not check any

permissions (CVE-2021-21694)

• jenkins: FilePath#listFiles lists files outside directories with agent read access when following symbolic links. (CVE-2021-21695)
• jenkins: Agent-to-controller access control allowed writing to sensitive directory used by Pipeline: Shared Groovy Libraries Plugin (CVE-2021-21696)
• jenkins: Agent-to-controller access control allows reading/writing most content of build directories (CVE-2021-21697)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

Before applying this update, ensure all previously released errata relevant to your system is applied.

See the following documentation, which will be updated shortly for release 3.11.569, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.openshift.com/container-platform/3.11/release_notes/ocp_3_11_release_notes.html

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at
https://access.redhat.com/articles/11258.

Affected Products

• Red Hat OpenShift Container Platform 3.11 x86_64
• Red Hat OpenShift Container Platform for Power 3.11 ppc64le

Fixes

• BZ - 1920894 - python2-urllib3: update 1.24.3 -> 1.26.2 for OCP breaks cloud-init ("Unable to get API token: None/latest/api/token")
• BZ - 2002671 - [3.11 backport] Improve logging-dump.sh (backport of LOG-1733)
• BZ - 2002909 - [Kuryr][3.11] dont block kuryr if one subnet runs out of IPs
• BZ - 2003491 - [Kuryr][3.11] Loadbalancer listener disappearing for an OpenShift services managed by Kuryr
• BZ - 2013496 - Kuryr-cni hitting >1024 pid and crashing
• BZ - 2016467 - openshift-pipeline plugin gone missing in jenkins-2-rhel7:v3.11.462-3.git.10eb612 and newer
• BZ - 2020322 - CVE-2021-21685 jenkins: FilePath#mkdirs does not check permission to create parent directories
• BZ - 2020323 - CVE-2021-21686 jenkins: File path filters do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories
• BZ - 2020324 - CVE-2021-21687 jenkins: FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic link
• BZ - 2020327 - CVE-2021-21688 jenkins: FilePath#reading(FileVisitor) does not reject any operations allowing users to have unrestricted read access
• BZ - 2020335 - CVE-2021-21689 jenkins: FilePath#unzip and FilePath#untar were not subject to any access control
• BZ - 2020336 - CVE-2021-21690 jenkins: Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path
• BZ - 2020338 - CVE-2021-21691 jenkins: Creating symbolic links is possible without the symlink permission
• BZ - 2020339 - CVE-2021-21692 jenkins: The operations FilePath#renameTo and FilePath#moveAllChildrenTo only check read permission on the source path
• BZ - 2020341 - CVE-2021-21693 jenkins: When creating temporary files, permission to create files is only checked after they’ve been created.
• BZ - 2020342 - CVE-2021-21694 jenkins: FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and FilePath#get*DiskSpace do not check any permissions
• BZ - 2020343 - CVE-2021-21695 jenkins: FilePath#listFiles lists files outside directories with agent read access when following symbolic links.
• BZ - 2020344 - CVE-2021-21696 jenkins: Agent-to-controller access control allowed writing to sensitive directory used by Pipeline: Shared Groovy Libraries Plugin
• BZ - 2020345 - CVE-2021-21697 jenkins: Agent-to-controller access control allows reading/writing most content of build directories
• BZ - 2020385 - CVE-2021-21698 jenkins-2-plugins/subversion: does not restrict the name of a file when looking up a subversion key
• BZ - 2026193 - Placeholder bug for OCP 3.11.z image release

CVEs

• CVE-2021-21685
• CVE-2021-21686
• CVE-2021-21687
• CVE-2021-21688
• CVE-2021-21689
• CVE-2021-21690
• CVE-2021-21691
• CVE-2021-21692
• CVE-2021-21693
• CVE-2021-21694
• CVE-2021-21695
• CVE-2021-21696
• CVE-2021-21697
• CVE-2021-21698

References

• https://access.redhat.com/security/updates/classification/#important