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    RedHat: RHSA-2020-5608:01 Important: fapolicyd bug fix update

    Date 16 Dec 2020
    354
    Posted By LinuxSecurity Advisories
    An update for fapolicyd is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. 2. Relevant releases/architectures: Red Hat Enterprise Linux AppStream EUS (v. 8.2) - aarch64, ppc64le, s390x, x86_64
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    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Important: fapolicyd bug fix update
    Advisory ID:       RHSA-2020:5608-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://access.redhat.com/errata/RHSA-2020:5608
    Issue date:        2020-12-17
    =====================================================================
    
    1. Summary:
    
    An update for fapolicyd is now available for Red Hat Enterprise Linux 8.2
    Extended Update Support.
    
    2. Relevant releases/architectures:
    
    Red Hat Enterprise Linux AppStream EUS (v. 8.2) - aarch64, ppc64le, s390x, x86_64
    
    3. Description:
    
    The fapolicyd software framework introduces a form of file access control
    based on a user-defined policy. The application file access control feature
    provides one of the most efficient ways to prevent running untrusted and
    possibly malicious applications on the system.
    
    Bug Fix:
    
    * When an update replaces the binary of a running application, the kernel
    modifies the application binary path in memory by appending the "
    (deleted)" suffix. Previously, the fapolicyd file access policy daemon
    treated such applications as untrusted, and prevented them from opening and
    executing any other files. As a consequence, the system was sometimes
    unable to boot after applying updates.
    
    With this update, fapolicyd ignores the suffix in the binary path so the
    binary can match the trust database. As a result, fapolicyd enforces the
    rules correctly and the update process can finish.
    
    (BZ#1906473)
    
    Note: The issue from BZ#1906473 was previously addressed in erratum
    RHBA-2020:5243 linked to from the References section. Due to the high
    impact of the issue that can cause systems to become unable to boot, we are
    releasing the same fix again in a security erratum to ensure proper
    visibility to users who only install security updates. This fix has not
    been changed in any way since the original bug fix erratum. This erratum
    does not provide any security fixes.
    
    For more details about the issue, see the Knowledgebase article 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/):
    
    1906473 - Erratum RHBA-2020:4969 is of no help when upgrading partially RHEL 8.2 systems [rhel-8.2.0.z]
    
    6. Package List:
    
    Red Hat Enterprise Linux AppStream EUS (v. 8.2):
    
    Source:
    fapolicyd-0.9.1-4.el8_2.4.src.rpm
    
    aarch64:
    fapolicyd-0.9.1-4.el8_2.4.aarch64.rpm
    fapolicyd-debuginfo-0.9.1-4.el8_2.4.aarch64.rpm
    fapolicyd-debugsource-0.9.1-4.el8_2.4.aarch64.rpm
    
    ppc64le:
    fapolicyd-0.9.1-4.el8_2.4.ppc64le.rpm
    fapolicyd-debuginfo-0.9.1-4.el8_2.4.ppc64le.rpm
    fapolicyd-debugsource-0.9.1-4.el8_2.4.ppc64le.rpm
    
    s390x:
    fapolicyd-0.9.1-4.el8_2.4.s390x.rpm
    fapolicyd-debuginfo-0.9.1-4.el8_2.4.s390x.rpm
    fapolicyd-debugsource-0.9.1-4.el8_2.4.s390x.rpm
    
    x86_64:
    fapolicyd-0.9.1-4.el8_2.4.x86_64.rpm
    fapolicyd-debuginfo-0.9.1-4.el8_2.4.x86_64.rpm
    fapolicyd-debugsource-0.9.1-4.el8_2.4.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/updates/classification/#important
    https://access.redhat.com/errata/RHBA-2020:5243
    https://access.redhat.com/solutions/5542661
    
    8. Contact:
    
    The Red Hat security contact is . More contact
    details at https://access.redhat.com/security/team/contact/
    
    Copyright 2020 Red Hat, Inc.
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