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AUSCERT External Security Bulletin Redistribution
ESB-2019.3269
USN-4110-1-4: Dovecot vulnerability - regression
29 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Dovecot
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-11500
Reference: ESB-2019.3261
Original Bulletin:
https://usn.ubuntu.com/4110-1/
https://usn.ubuntu.com/4110-2/
https://usn.ubuntu.com/4110-3/
https://usn.ubuntu.com/4110-4/
Comment: This bulletin contains four (4) Ubuntu security advisories.
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USN-4110-1: Dovecot vulnerability
28 August 2019
dovecot vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Dovecot could be made to crash or execute arbitrary code if it received a
specially crafted data.
Software Description
o dovecot - IMAP and POP3 email server
Details
Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly handled
certain data. An attacker could possibly use this issue to cause a denial of
service or execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
dovecot-core - 1:2.3.4.1-1ubuntu2.3
Ubuntu 18.04 LTS
dovecot-core - 1:2.2.33.2-1ubuntu4.4
Ubuntu 16.04 LTS
dovecot-core - 1:2.2.22-1ubuntu2.11
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-11500
- -----------------------------------------------------------------------------
USN-4110-2: Dovecot vulnerability
28 August 2019
dovecot vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Summary
Dovecot could be made to crash or execute arbitrary code if it received a
specially crafted data.
Software Description
o dovecot - IMAP and POP3 email server
Details
USN-4110-1 fixed a vulnerability in Dovecot. This update provides the
corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly handled
certain data. An attacker could possibly use this issue to cause a denial of
service or execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04 ESM
dovecot-core - 1:2.2.9-1ubuntu2.6+esm1
Ubuntu 12.04 ESM
dovecot-core - 1:2.0.19-0ubuntu2.7
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o USN-4110-1
o CVE-2019-11500
- ----------------------------------------------------------------------------
USN-4110-3: Dovecot regression
28 August 2019
Dovecot regression
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
USN-4110-1 introduced a regression in Dovecot.
Software Description
o dovecot - IMAP and POP3 email server
Details
USN-4110-1 fixed a vulnerability in Dovecot. The update introduced a regression
causing a wrong check. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly handled
certain data. An attacker could possibly use this issue to cause a denial of
service or execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.04
dovecot-core - 1:2.3.4.1-1ubuntu2.4
Ubuntu 18.04 LTS
dovecot-core - 1:2.2.33.2-1ubuntu4.5
Ubuntu 16.04 LTS
dovecot-core - 1:2.2.22-1ubuntu2.12
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o USN-4110-1
o CVE-2019-11500
- -----------------------------------------------------------------------------
USN-4110-4: Dovecot regression
28 August 2019
dovecot regression
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Summary
USN-4110-1 introduced a regression in Dovecot.
Software Description
o dovecot - IMAP and POP3 email server
Details
USN-4110-1 fixed a vulnerability in Dovecot. The update introduced a regression
causing a wrong check. This update fixes the problem for Ubuntu 12.04 ESM and
Ubuntu 14.04 ESM.
We apologize for the inconvenience.
Original advisory details:
Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly handled
certain data. An attacker could possibly use this issue to cause a denial of
service or execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04 ESM
dovecot-core - 1:2.2.9-1ubuntu2.6+esm2
Ubuntu 12.04 ESM
dovecot-core - 1:2.0.19-0ubuntu2.8
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o USN-4110-1
o CVE-2019-11500
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