ID

VAR-202103-1001

CVE

CVE-2021-28153

TITLE

GNOME GLib  Link interpretation vulnerability in

DESCRIPTION

An issue was discovered in GNOME GLib before 2.66.8. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION to replace a path that is a dangling symlink, it incorrectly also creates the target of the symlink as an empty file, which could conceivably have security relevance if the symlink is attacker-controlled. (If the path is a symlink to a file that already exists, then the contents of that file correctly remain unchanged.). GNOME Glib is a multi-platform toolkit for creating graphical user interfaces, and is the underlying core library of GTK+ and GNOME projects. The vulnerability is caused by g_file_replace and G_FILE_CREATE_REPLACE_DESTINATION incorrectly creating the target of a symbolic link as an empty file. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: glib2 security and bug fix update Advisory ID: RHSA-2021:4385-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:4385 Issue date: 2021-11-09 CVE Names: CVE-2021-3800 CVE-2021-28153 ==================================================================== 1. Summary: An update for glib2 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux CRB (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64 3. Description: GLib provides the core application building blocks for libraries and applications written in C. It provides the core object system used in GNOME, the main loop implementation, and a large set of utility functions for strings and common data structures. Security Fix(es): * glib2: Possible privilege escalation thourgh pkexec and aliases (CVE-2021-3800) * glib: g_file_replace() with G_FILE_CREATE_REPLACE_DESTINATION creates empty target for dangling symlink (CVE-2021-28153) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1938284 - CVE-2021-3800 glib2: Possible privilege escalation thourgh pkexec and aliases 1938291 - CVE-2021-28153 glib: g_file_replace() with G_FILE_CREATE_REPLACE_DESTINATION creates empty target for dangling symlink 1948988 - Refcounting issue causes crashes and slow workarounds 1971533 - MD5 HMAC computation should not cause glib to segfault in FIPS mode 6. Package List: Red Hat Enterprise Linux BaseOS (v. 8): Source: glib2-2.56.4-156.el8.src.rpm aarch64: glib2-2.56.4-156.el8.aarch64.rpm glib2-debuginfo-2.56.4-156.el8.aarch64.rpm glib2-debugsource-2.56.4-156.el8.aarch64.rpm glib2-devel-2.56.4-156.el8.aarch64.rpm glib2-devel-debuginfo-2.56.4-156.el8.aarch64.rpm glib2-fam-2.56.4-156.el8.aarch64.rpm glib2-fam-debuginfo-2.56.4-156.el8.aarch64.rpm glib2-tests-2.56.4-156.el8.aarch64.rpm glib2-tests-debuginfo-2.56.4-156.el8.aarch64.rpm ppc64le: glib2-2.56.4-156.el8.ppc64le.rpm glib2-debuginfo-2.56.4-156.el8.ppc64le.rpm glib2-debugsource-2.56.4-156.el8.ppc64le.rpm glib2-devel-2.56.4-156.el8.ppc64le.rpm glib2-devel-debuginfo-2.56.4-156.el8.ppc64le.rpm glib2-fam-2.56.4-156.el8.ppc64le.rpm glib2-fam-debuginfo-2.56.4-156.el8.ppc64le.rpm glib2-tests-2.56.4-156.el8.ppc64le.rpm glib2-tests-debuginfo-2.56.4-156.el8.ppc64le.rpm s390x: glib2-2.56.4-156.el8.s390x.rpm glib2-debuginfo-2.56.4-156.el8.s390x.rpm glib2-debugsource-2.56.4-156.el8.s390x.rpm glib2-devel-2.56.4-156.el8.s390x.rpm glib2-devel-debuginfo-2.56.4-156.el8.s390x.rpm glib2-fam-2.56.4-156.el8.s390x.rpm glib2-fam-debuginfo-2.56.4-156.el8.s390x.rpm glib2-tests-2.56.4-156.el8.s390x.rpm glib2-tests-debuginfo-2.56.4-156.el8.s390x.rpm x86_64: glib2-2.56.4-156.el8.i686.rpm glib2-2.56.4-156.el8.x86_64.rpm glib2-debuginfo-2.56.4-156.el8.i686.rpm glib2-debuginfo-2.56.4-156.el8.x86_64.rpm glib2-debugsource-2.56.4-156.el8.i686.rpm glib2-debugsource-2.56.4-156.el8.x86_64.rpm glib2-devel-2.56.4-156.el8.i686.rpm glib2-devel-2.56.4-156.el8.x86_64.rpm glib2-devel-debuginfo-2.56.4-156.el8.i686.rpm glib2-devel-debuginfo-2.56.4-156.el8.x86_64.rpm glib2-fam-2.56.4-156.el8.x86_64.rpm glib2-fam-debuginfo-2.56.4-156.el8.i686.rpm glib2-fam-debuginfo-2.56.4-156.el8.x86_64.rpm glib2-tests-2.56.4-156.el8.x86_64.rpm glib2-tests-debuginfo-2.56.4-156.el8.i686.rpm glib2-tests-debuginfo-2.56.4-156.el8.x86_64.rpm Red Hat Enterprise Linux CRB (v. 8): aarch64: glib2-debuginfo-2.56.4-156.el8.aarch64.rpm glib2-debugsource-2.56.4-156.el8.aarch64.rpm glib2-devel-debuginfo-2.56.4-156.el8.aarch64.rpm glib2-fam-debuginfo-2.56.4-156.el8.aarch64.rpm glib2-static-2.56.4-156.el8.aarch64.rpm glib2-tests-debuginfo-2.56.4-156.el8.aarch64.rpm noarch: glib2-doc-2.56.4-156.el8.noarch.rpm ppc64le: glib2-debuginfo-2.56.4-156.el8.ppc64le.rpm glib2-debugsource-2.56.4-156.el8.ppc64le.rpm glib2-devel-debuginfo-2.56.4-156.el8.ppc64le.rpm glib2-fam-debuginfo-2.56.4-156.el8.ppc64le.rpm glib2-static-2.56.4-156.el8.ppc64le.rpm glib2-tests-debuginfo-2.56.4-156.el8.ppc64le.rpm s390x: glib2-debuginfo-2.56.4-156.el8.s390x.rpm glib2-debugsource-2.56.4-156.el8.s390x.rpm glib2-devel-debuginfo-2.56.4-156.el8.s390x.rpm glib2-fam-debuginfo-2.56.4-156.el8.s390x.rpm glib2-static-2.56.4-156.el8.s390x.rpm glib2-tests-debuginfo-2.56.4-156.el8.s390x.rpm x86_64: glib2-debuginfo-2.56.4-156.el8.i686.rpm glib2-debuginfo-2.56.4-156.el8.x86_64.rpm glib2-debugsource-2.56.4-156.el8.i686.rpm glib2-debugsource-2.56.4-156.el8.x86_64.rpm glib2-devel-debuginfo-2.56.4-156.el8.i686.rpm glib2-devel-debuginfo-2.56.4-156.el8.x86_64.rpm glib2-fam-debuginfo-2.56.4-156.el8.i686.rpm glib2-fam-debuginfo-2.56.4-156.el8.x86_64.rpm glib2-static-2.56.4-156.el8.i686.rpm glib2-static-2.56.4-156.el8.x86_64.rpm glib2-tests-debuginfo-2.56.4-156.el8.i686.rpm glib2-tests-debuginfo-2.56.4-156.el8.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2021-3800 https://access.redhat.com/security/cve/CVE-2021-28153 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/ 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYYrdwdzjgjWX9erEAQj1Ww//TA/kISfe8RjrOJ3//LZrFuwYWT/lYRvA azcyR6n+o/hSTHmAJ0ccc8y2SVdh/ukBI96cB8n4BKAYlZhbdXFm3btcItT8rpqP Cc0z1SIhna+nm8Kdo4eDmjgMUm96E+uKq2bgmxduLWjYfKr/AB0n25nSn1o9sdAl F2iL6vlgmVtfGfa3ODovzIDwas7udIlaRzjnAmA9QSnnQUfZhvsBJbWcMJWJxej9 SrT5lkwPXYJxyGuXN8MD+kfgwjyXS3G+Svv//YkBmuiYjqpQJghRe3YfHCeQ6ow6 NlMOs2ZgNVIN8c03mhpZj6vUIr2qO7LcfUZaKCdIoTbVZKZY1yPkLxQ63EEB/AnP 2pnAwybjS06Izr8JWjwGt/20+gsq1sGWKKU1T/yuLtj6kADbDrY/T6ApnBxF5ajD 6h6Q5UebLHX3p/ks8Kz4V+/hqHXjjWfqy9x16909n2TSwjuGeszqaNrQYjF3lwqt J04E3kWavzyHK5Gr4ZwuS/lLoTNfvWHLRY8GoySL6Wt2agLskbDTgqBoe1NptbT+ siyOCEMFaWC7g5dhzdAusTzHUUJnnLbZzypb1581Ie42A4un+x3F7epktk462WKl uXmc5Big8aODwsVuMd+foFkOD0JKmK8RcfT8W0WciRAPycj5yq009wavogQ/7AEa Kweg3HIZMNU\xc8A2 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce . Summary: The Migration Toolkit for Containers (MTC) 1.6.3 is now available. Description: The Migration Toolkit for Containers (MTC) enables you to migrate Kubernetes resources, persistent volume data, and internal container images between OpenShift Container Platform clusters, using the MTC web console or the Kubernetes API. Bugs fixed (https://bugzilla.redhat.com/): 2019088 - "MigrationController" CR displays syntax error when unquiescing applications 2021666 - Route name longer than 63 characters causes direct volume migration to fail 2021668 - "MigrationController" CR ignores the "cluster_subdomain" value for direct volume migration routes 2022017 - CVE-2021-3948 mig-controller: incorrect namespaces handling may lead to not authorized usage of Migration Toolkit for Containers (MTC) 2024966 - Manifests not used by Operator Lifecycle Manager must be removed from the MTC 1.6 Operator image 2027196 - "migration-controller" pod goes into "CrashLoopBackoff" state if an invalid registry route is entered on the "Clusters" page of the web console 2027382 - "Copy oc describe/oc logs" window does not close automatically after timeout 2028841 - "rsync-client" container fails during direct volume migration with "Address family not supported by protocol" error 2031793 - "migration-controller" pod goes into "CrashLoopBackOff" state if "MigPlan" CR contains an invalid "includedResources" resource 2039852 - "migration-controller" pod goes into "CrashLoopBackOff" state if "MigPlan" CR contains an invalid "destMigClusterRef" or "srcMigClusterRef" 5. Summary: Red Hat Advanced Cluster Management for Kubernetes 2.2.10 General Availability release images, which provide one or more container updates and bug fixes. Description: Red Hat Advanced Cluster Management for Kubernetes 2.2.10 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console — with security policy built in. See the following Release Notes documentation, which will be updated shortly for this release, for additional details about this release: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.2/html/release_notes/ Security fixes: * CVE-2021-3795 semver-regex: inefficient regular expression complexity * CVE-2021-23440 nodejs-set-value: type confusion allows bypass of CVE-2019-10747 Related bugs: * RHACM 2.2.10 images (Bugzilla #2013652) 3. Bugs fixed (https://bugzilla.redhat.com/): 2004944 - CVE-2021-23440 nodejs-set-value: type confusion allows bypass of CVE-2019-10747 2006009 - CVE-2021-3795 semver-regex: inefficient regular expression complexity 2013652 - RHACM 2.2.10 images 5. Description: Red Hat Openshift GitOps is a declarative way to implement continuous deployment for cloud native applications. Bugs fixed (https://bugzilla.redhat.com/): 2050826 - CVE-2022-24348 gitops: Path traversal and dereference of symlinks when passing Helm value files 5. ========================================================================== Ubuntu Security Notice USN-4764-1 March 15, 2021 glib2.0 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: GLib could be made to create files if it opened a specially crafted archive. Software Description: - glib2.0: GLib library of C routines Details: It was discovered that GLib incorrectly handled certain symlinks when replacing files. If a user or automated system were tricked into extracting a specially crafted file with File Roller, a remote attacker could possibly create files outside of the intended directory. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: libglib2.0-0 2.66.1-2ubuntu0.2 Ubuntu 20.04 LTS: libglib2.0-0 2.64.6-1~ubuntu20.04.3 Ubuntu 18.04 LTS: libglib2.0-0 2.56.4-0ubuntu0.18.04.8 Ubuntu 16.04 LTS: libglib2.0-0 2.48.2-0ubuntu4.8 In general, a standard system update will make all the necessary changes. Description: OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform. Bugs fixed (https://bugzilla.redhat.com/): 1983596 - CVE-2021-34558 golang: crypto/tls: certificate of wrong type is causing TLS client to panic 1992006 - CVE-2021-29923 golang: net: incorrect parsing of extraneous zero characters at the beginning of an IP address octet 1997017 - unprivileged client fails to get guest agent data 1998855 - Node drain: Sometimes source virt-launcher pod status is Failed and not Completed 2000251 - RoleBinding and ClusterRoleBinding brought in by kubevirt does not get reconciled when kind is ServiceAccount 2001270 - [VMIO] [Warm from Vmware] Snapshot files are not deleted after Successful Import 2001281 - [VMIO] [Warm from VMware] Source VM should not be turned ON if vmio import is removed 2001901 - [4.8.3] NNCP creation failures after nmstate-handler pod deletion 2007336 - 4.8.3 containers 2007776 - Failed to Migrate Windows VM with CDROM (readonly) 2008511 - [CNV-4.8.3] VMI is in LiveMigrate loop when Upgrading Cluster from 2.6.7/4.7.32 to OCP 4.8.13 2012890 - With descheduler during multiple VMIs migrations, some VMs are restarted 2025475 - [4.8.3] Upgrade from 2.6 to 4.x versions failed due to vlan-filtering issues 2026881 - [4.8.3] vlan-filtering is getting applied on veth ports 5. JIRA issues fixed (https://issues.jboss.org/): TRACING-2235 - Release RHOSDT 2.1 6

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

post link

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Ubuntu

SOURCES

LAST UPDATE DATE

2026-03-29T22:46:30.343000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE