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====================================================================                   
Red Hat Security Advisory

Synopsis:          Important: polkit security update
Advisory ID:       RHSA-2022:0272-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2022:0272
Issue date:        2022-01-25
CVE Names:         CVE-2021-4034
====================================================================
1. Summary:

An update for polkit is now available for Red Hat Enterprise Linux 7.4
Advanced Update Support.

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 Server AUS (v. 7.4) - noarch, x86_64

3. Description:

The polkit packages provide a component for controlling system-wide
privileges. This component provides a uniform and organized way for
non-privileged processes to communicate with privileged ones.

Security Fix(es):

* polkit: Local privilege escalation in pkexec due to incorrect handling of
argument vector (CVE-2021-4034)

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.

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/):

2025869 - CVE-2021-4034 polkit: Local privilege escalation in pkexec due to incorrect handling of argument vector

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.4):

Source:
polkit-0.112-12.el7_4.2.src.rpm

noarch:
polkit-docs-0.112-12.el7_4.2.noarch.rpm

x86_64:
polkit-0.112-12.el7_4.2.i686.rpm
polkit-0.112-12.el7_4.2.x86_64.rpm
polkit-debuginfo-0.112-12.el7_4.2.i686.rpm
polkit-debuginfo-0.112-12.el7_4.2.x86_64.rpm
polkit-devel-0.112-12.el7_4.2.i686.rpm
polkit-devel-0.112-12.el7_4.2.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-2021-4034
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/RHSB-2022-001

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2022 Red Hat, Inc.
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