RedHat: RHSA-2020-5608:01 Important: fapolicyd bug fix update
Summary
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.
Summary
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
References
https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/errata/RHBA-2020:5243 https://access.redhat.com/solutions/5542661
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/
Topic
An update for fapolicyd is now available for Red Hat Enterprise Linux 8.2Extended Update Support.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AppStream EUS (v. 8.2) - aarch64, ppc64le, s390x, x86_64
Bugs Fixed
1906473 - Erratum RHBA-2020:4969 is of no help when upgrading partially RHEL 8.2 systems [rhel-8.2.0.z]
