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Red Hat: RHSA-2020-3735-01 Important: Dovecot Resource Exhaustion Risk

red hat
Calendar Grey September 14, 2020
Dist Redhat Esm H88
A significant patch for Dovecot on Red Hat Enterprise Linux tackles urgent vulnerabilities and potential resource challenges.
An update for dovecot is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

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: Resource exhaustion via deeply nested MIME parts (CVE-2020-12100)
* dovecot: Out of bound reads in dovecot NTLM implementation (CVE-2020-12673)
* dovecot: Crash due to assert in RPA implementation (CVE-2020-12674)
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 dovecot crash risk resource exhaustion out of bounds read

References

https://access.redhat.com/security/cve/CVE-2020-12100 https://access.redhat.com/security/cve/CVE-2020-12673 https://access.redhat.com/security/cve/CVE-2020-12674 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream E4S (v. 8.0):
Source: dovecot-2.2.36-5.el8_0.3.src.rpm
aarch64: dovecot-2.2.36-5.el8_0.3.aarch64.rpm dovecot-debuginfo-2.2.36-5.el8_0.3.aarch64.rpm dovecot-debugsource-2.2.36-5.el8_0.3.aarch64.rpm dovecot-mysql-2.2.36-5.el8_0.3.aarch64.rpm dovecot-mysql-debuginfo-2.2.36-5.el8_0.3.aarch64.rpm dovecot-pgsql-2.2.36-5.el8_0.3.aarch64.rpm dovecot-pgsql-debuginfo-2.2.36-5.el8_0.3.aarch64.rpm dovecot-pigeonhole-debuginfo-2.2.36-5.el8_0.3.aarch64.rpm
ppc64le: dovecot-2.2.36-5.el8_0.3.ppc64le.rpm dovecot-debuginfo-2.2.36-5.el8_0.3.ppc64le.rpm dovecot-debugsource-2.2.36-5.el8_0.3.ppc64le.rpm dovecot-mysql-2.2.36-5.el8_0.3.ppc64le.rpm dovecot-mysql-debuginfo-2.2.36-5.el8_0.3.ppc64le.rpm dovecot-pgsql-2.2.36-5.el8_0.3.ppc64le.rpm dovecot-pgsql-debuginfo-2.2.36-5.el8_0.3.ppc64le.rpm dovecot-pigeonhole-debuginfo-2.2.36-5.el8_0.3.ppc64le.rpm
s390x: dovecot-2.2.36-5.el8_0.3.s390x.rpm dovecot-debuginfo-2.2.36-5.el8_0.3.s390x.rpm dovecot-debugsource-2.2.36-5.el8_0.3.s390x.rpm dovecot-mysql-2.2.36-5.el8_0.3.s390x.rpm dovecot-mysql-debuginfo-2.2.36-5.el8_0.3.s390x.rpm dovecot-pgsql-2.2.36-5.el8_0.3.s390x.rpm dovecot-pgsql-debuginfo-2.2.36-5.el8_0.3.s390x.rpm dovecot-pigeonhole-debuginfo-2.2.36-5.el8_0.3.s390x.rpm
x86_64:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:3735-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3735
Issue date: 2020-09-14

Topic

An update for dovecot is now available for Red Hat Enterprise Linux 8.0Update Services for SAP Solutions.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 dovecot crash risk resource exhaustion out of bounds read

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream E4S (v. 8.0) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1866309 - CVE-2020-12100 dovecot: Resource exhaustion via deeply nested MIME parts

1866313 - CVE-2020-12673 dovecot: Out of bound reads in dovecot NTLM implementation

1866317 - CVE-2020-12674 dovecot: Crash due to assert in RPA implementation

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