Archive | Security & Privacy

NEW! Patch Release: Improved Language Support, Modern UI, Distribution Lists & Other Security Enhancements

Patch Security Severity: Low Deployment Risk: Medium This release focuses on improving user experience, enhancing group communication and essential security for the following editions Zimbra Daffodil 10.0.7 (Release Notes) Zimbra 9.0.0 Kepler Patch-39 (Release Notes) Patch updated on 28 Feb include the following in their respective releases What’s New Improved Language Support (Zimbra Daffodil) OnlyOffice […]

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How to implement (external LDAP) authentication in a Zimbra Java Extension

Frequent readers of the Zimbra blog will know that Zimbra can be extended/customized by using Zimlets. By creating your own Zimlets you can add functionality to the UI (front-end) and the Java back-end, allowing you to cater to specific customer needs. Zimlets can be enabled globally or per user (group) Details on this can be […]

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SMTP Smuggling in Zimbra Postfix a technical deepdive

E-mail providers like Microsoft Exchange Online and GMX allowed to pass <LF>.<CR><LF> sequence unfiltered from their outbound (sending mails) SMTP server to the inbound (receiving mails) SMTP server (postfix in our case). In the case of Postfix serving as an outbound/inbound (sending mails/receiving mails) server, it does not ignore the sequence ‘<LF>.<CR><LF>’; rather, it interprets […]

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Zimbra and SMTP Smuggling attack on Postfix

Recently an SMTP Smuggling attack on Postfix was published, as mentioned by the Postfix project: Days before a 10+ day holiday break and associated production change freeze, SEC Consult has published an email spoofing attack that involves a composition of email services with specific differences in the way they handle line endings other than <CR><LF>. […]

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Patch Release For Deprecated Files Deletion, OpenJDK Security Enhancement, Migration Support to Zimbra Daffodil (v10)

Patch Severity: High. This release addresses critical bug fixes and essential security updates  Patch Release for the following editions Zimbra Daffodil 10.0.6 (Release Notes) Zimbra 9.0.0 Kepler Patch-38 (Release Notes) Zimbra 8.8.15 Joule Patch-45 (Release Notes)  Patch updated on 18 Dec include the following in their respective releases What’s New OpenJDK has been upgraded to […]

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