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Red Hat 8: RHSA-2019-2822-01 Important: Dovecot IMAP Issue

red hat
Calendar Grey September 19, 2019
Dist Redhat Esm H88
Red Hat has issued a significant security patch for dovecot on RHEL 8, tackling a problem related to improper handling of NULL bytes.
An update for dovecot is now available for Red Hat Enterprise Linux 8

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

Summary

Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages.
Security Fix(es):
* dovecot: improper NULL byte handling in IMAP and ManageSieve protocol parsers leads to out of bounds writes (CVE-2019-11500)
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.

Topics%20covered

Topics Covered

security advisory Red Hat important security impact network service dovecot IMAP

References

https://access.redhat.com/security/cve/CVE-2019-11500 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: dovecot-2.2.36-5.el8_0.1.src.rpm
aarch64: dovecot-2.2.36-5.el8_0.1.aarch64.rpm dovecot-debuginfo-2.2.36-5.el8_0.1.aarch64.rpm dovecot-debugsource-2.2.36-5.el8_0.1.aarch64.rpm dovecot-mysql-2.2.36-5.el8_0.1.aarch64.rpm dovecot-mysql-debuginfo-2.2.36-5.el8_0.1.aarch64.rpm dovecot-pgsql-2.2.36-5.el8_0.1.aarch64.rpm dovecot-pgsql-debuginfo-2.2.36-5.el8_0.1.aarch64.rpm dovecot-pigeonhole-debuginfo-2.2.36-5.el8_0.1.aarch64.rpm
ppc64le: dovecot-2.2.36-5.el8_0.1.ppc64le.rpm dovecot-debuginfo-2.2.36-5.el8_0.1.ppc64le.rpm dovecot-debugsource-2.2.36-5.el8_0.1.ppc64le.rpm dovecot-mysql-2.2.36-5.el8_0.1.ppc64le.rpm dovecot-mysql-debuginfo-2.2.36-5.el8_0.1.ppc64le.rpm dovecot-pgsql-2.2.36-5.el8_0.1.ppc64le.rpm dovecot-pgsql-debuginfo-2.2.36-5.el8_0.1.ppc64le.rpm dovecot-pigeonhole-debuginfo-2.2.36-5.el8_0.1.ppc64le.rpm
s390x: dovecot-2.2.36-5.el8_0.1.s390x.rpm dovecot-debuginfo-2.2.36-5.el8_0.1.s390x.rpm dovecot-debugsource-2.2.36-5.el8_0.1.s390x.rpm dovecot-mysql-2.2.36-5.el8_0.1.s390x.rpm dovecot-mysql-debuginfo-2.2.36-5.el8_0.1.s390x.rpm dovecot-pgsql-2.2.36-5.el8_0.1.s390x.rpm dovecot-pgsql-debuginfo-2.2.36-5.el8_0.1.s390x.rpm dovecot-pigeonhole-debuginfo-2.2.36-5.el8_0.1.s390x.rpm
x86_64:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2822-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2822
Issue date: 2019-09-20

Topic

An update for dovecot is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat important security impact network service dovecot IMAP

Relevant Releases Architectures

Red Hat CodeReady Linux Builder (v. 8) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1741141 - CVE-2019-11500 dovecot: improper NULL byte handling in IMAP and ManageSieve protocol parsers leads to out of bounds writes

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