Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.0037
dovecot security update
6 January 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: dovecot
Publisher: Debian
Operating System: Debian GNU/Linux
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-25275 CVE-2020-24386
Reference: ESB-2021.0027
ESB-2021.0026
Original Bulletin:
https://www.debian.org/lts/security/2020/dla-2517
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Debian LTS Advisory DLA-2517-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Chris Lamb
January 05, 2021 https://wiki.debian.org/LTS
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Package : dovecot
Version : 1:2.2.27-3+deb9u7
CVE IDs : CVE-2020-24386 & CVE-2020-25275
It was discovered that there were two issues in the Dovecot IMAP
server:
* CVE-2020-24386: Prevent an issue where an attacker could cause
Dovecot to discover file system directory structure and even
access other users' emails using a pecially crafted command.
* CVE-2020-25275: Prevent an issue where a malicious sender can
crash Dovecot repeatedly by sending messages with more than
10,000 MIME parts.
For Debian 9 "Stretch", these problems has been fixed in version
1:2.2.27-3+deb9u7 and we recommend that you upgrade your dovecot
packages.
For the detailed security status of dovecot please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/dovecot
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
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