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Red Hat Enterprise Linux 8 RHSA-2021-4385 Moderate: GLib2 Escalation Fix

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
A significant glib2 security patch for Red Hat Enterprise Linux 8 resolves vulnerabilities related to privilege escalation and unauthorized file substitution.
An update for glib2 is now available for Red Hat Enterprise Linux 8

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

Summary

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.

Topics%20covered

Topics Covered

security advisory privilege escalation bug fix Red Hat Enterprise Linux security impact glib2

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://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.5_release_notes/index

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

Read the Full Advisory


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

Topic

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory privilege escalation bug fix Red Hat Enterprise Linux security impact glib2

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

Bugs Fixed

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

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