Operating System:

[RedHat]

Published:

06 November 2020

Protect yourself against future threats.

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3869
                        cyrus-imapd security update
                              6 November 2020

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           cyrus-imapd
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Increased Privileges            -- Remote/Unauthenticated
                   Execute Arbitrary Code/Commands -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-19783 CVE-2019-18928 

Reference:         ESB-2020.3440
                   ESB-2019.4746

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2020:4655

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

Synopsis:          Moderate: cyrus-imapd security update
Advisory ID:       RHSA-2020:4655-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:4655
Issue date:        2020-11-03
CVE Names:         CVE-2019-18928 CVE-2019-19783 
=====================================================================

1. Summary:

An update for cyrus-imapd is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

3. Description:

The cyrus-imapd packages contain a high-performance mail server with IMAP,
POP3, NNTP, and SIEVE support.

Security Fix(es):

* cyrus-imapd: privilege escalation in HTTP request (CVE-2019-18928)

* cyrus-imapd: lmtpd component created mailboxes with administrator
privileges if the "fileinto" was used, bypassing ACL checks
(CVE-2019-19783)

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 8.3 Release Notes 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/):

1671239 - Changelog was removed, reverting the commit is required
1710722 - cyrus-imapd-key.pem has wrong permissions
1775177 - CVE-2019-18928 cyrus-imapd: privilege escalation in HTTP request
1786756 - CVE-2019-19783 cyrus-imapd: lmtpd component created mailboxes with administrator privileges if the "fileinto" was used, bypassing ACL checks

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
cyrus-imapd-3.0.7-19.el8.src.rpm

aarch64:
cyrus-imapd-3.0.7-19.el8.aarch64.rpm
cyrus-imapd-debuginfo-3.0.7-19.el8.aarch64.rpm
cyrus-imapd-debugsource-3.0.7-19.el8.aarch64.rpm
cyrus-imapd-utils-3.0.7-19.el8.aarch64.rpm
cyrus-imapd-utils-debuginfo-3.0.7-19.el8.aarch64.rpm
cyrus-imapd-vzic-3.0.7-19.el8.aarch64.rpm
cyrus-imapd-vzic-debuginfo-3.0.7-19.el8.aarch64.rpm

ppc64le:
cyrus-imapd-3.0.7-19.el8.ppc64le.rpm
cyrus-imapd-debuginfo-3.0.7-19.el8.ppc64le.rpm
cyrus-imapd-debugsource-3.0.7-19.el8.ppc64le.rpm
cyrus-imapd-utils-3.0.7-19.el8.ppc64le.rpm
cyrus-imapd-utils-debuginfo-3.0.7-19.el8.ppc64le.rpm
cyrus-imapd-vzic-3.0.7-19.el8.ppc64le.rpm
cyrus-imapd-vzic-debuginfo-3.0.7-19.el8.ppc64le.rpm

s390x:
cyrus-imapd-3.0.7-19.el8.s390x.rpm
cyrus-imapd-debuginfo-3.0.7-19.el8.s390x.rpm
cyrus-imapd-debugsource-3.0.7-19.el8.s390x.rpm
cyrus-imapd-utils-3.0.7-19.el8.s390x.rpm
cyrus-imapd-utils-debuginfo-3.0.7-19.el8.s390x.rpm
cyrus-imapd-vzic-3.0.7-19.el8.s390x.rpm
cyrus-imapd-vzic-debuginfo-3.0.7-19.el8.s390x.rpm

x86_64:
cyrus-imapd-3.0.7-19.el8.i686.rpm
cyrus-imapd-3.0.7-19.el8.x86_64.rpm
cyrus-imapd-debuginfo-3.0.7-19.el8.i686.rpm
cyrus-imapd-debuginfo-3.0.7-19.el8.x86_64.rpm
cyrus-imapd-debugsource-3.0.7-19.el8.i686.rpm
cyrus-imapd-debugsource-3.0.7-19.el8.x86_64.rpm
cyrus-imapd-utils-3.0.7-19.el8.x86_64.rpm
cyrus-imapd-utils-debuginfo-3.0.7-19.el8.i686.rpm
cyrus-imapd-utils-debuginfo-3.0.7-19.el8.x86_64.rpm
cyrus-imapd-vzic-3.0.7-19.el8.x86_64.rpm
cyrus-imapd-vzic-debuginfo-3.0.7-19.el8.i686.rpm
cyrus-imapd-vzic-debuginfo-3.0.7-19.el8.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-2019-18928
https://access.redhat.com/security/cve/CVE-2019-19783
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/

8. Contact:

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

Copyright 2020 Red Hat, Inc.
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