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AUSCERT External Security Bulletin Redistribution
mingw-glib2 security, bug fix, and enhancement update
10 November 2021
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2021-27219 CVE-2021-27218
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Red Hat Security Advisory
Synopsis: Important: mingw-glib2 security, bug fix, and enhancement update
Advisory ID: RHSA-2021:4526-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4526
Issue date: 2021-11-09
CVE Names: CVE-2021-27218 CVE-2021-27219
An update for mingw-glib2 is now available for Red Hat Enterprise Linux 8.
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.
2. Relevant releases/architectures:
Red Hat Enterprise Linux CRB (v. 8) - noarch
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.
The following packages have been upgraded to a later upstream version:
mingw-glib2 (2.66.7). (BZ#1935248, BZ#1939111)
* glib: integer overflow in g_bytes_new function on 64-bit platforms due to
an implicit cast from 64 bits to 32 bits (CVE-2021-27219)
* glib: integer overflow in g_byte_array_new_take function when called with
a buffer of 4GB or more on a 64-bit platform (CVE-2021-27218)
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.
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.5 Release Notes linked from the References section.
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
5. Bugs fixed (https://bugzilla.redhat.com/):
1929847 - CVE-2021-27218 glib: integer overflow in g_byte_array_new_take function
when called with a buffer of 4GB or more on a 64-bit platform
1929858 - CVE-2021-27219 glib: integer overflow in g_bytes_new function on 64-bit
platforms due to an implicit cast from 64 bits to 32 bits
6. Package List:
Red Hat Enterprise Linux CRB (v. 8):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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