Update … Supported Zimbra Versions Not Affected By Zero-Day Exploit Vulnerability for Log4j

Hi Zimbra Customers, Partner and Friends,

This is an update to our statement yesterday …

After intensive review and testing, Zimbra Development determined that the zero-day exploit vulnerability for Log4j (CVE-2021-44228) does not affect the current Supported Zimbra versions (9.0.0 & 8.8.15). Zimbra Collaboration Server currently uses Log4j version 1.2.16. The cause of the vulnerability is found in the lookup expression feature in Log4j versions 2.0 to 2.17.

Also, the Redhat (CVE-2021-4104) vulnerability does not affect the current Supported Zimbra Collaboration Server versions (8.8.15 & 9.0.0). For this vulnerability to affect the server, it needs JMSAppender and the ability to append configuration files. Zimbra does not use the JMSAppender.

We are in the process of upgrading Log4j and expect it to be completed within the first quarter of 2022.

Thank you,

Your Zimbra Team

8 Responses to Update … Supported Zimbra Versions Not Affected By Zero-Day Exploit Vulnerability for Log4j

  1. Ioannis Chrysanthou December 15, 2021 at 2:42 AM #

    We have Zimbra Release 8.8.12_GA_3794.RHEL7_64_20190329045002 RHEL7_64 NETWORK edition, Patch 8.8.12_P6.

    Do you know if this version is affected by this vulnerability?

    • Barry de Graaff December 21, 2021 at 1:54 AM #

      Version 8.8.12 is out-of-date and unsupported, and you should update to a supported version of Zimbra

  2. Arsha December 15, 2021 at 5:47 AM #

    Hi
    Could you please confirm Zimbra version 8.8.5 is vlnerable or not?

    • Barry de Graaff December 21, 2021 at 1:54 AM #

      Version 8.8.5 is out-of-date and unsupported, and you should update to a supported version of Zimbra

  3. Imran Khan A December 28, 2021 at 11:23 PM #

    HI Team,

    Could you please confirm, 8.8.15 Zimbra version affected for Log4j Vulnerable, update Log4j is released? Please confirm

    • Gayle Billat January 20, 2022 at 9:18 AM #

      Hi Imran – Version 8.8.15 is not vulnerable.

  4. David January 3, 2022 at 9:41 AM #

    for version 8.8.11 should I upgrade or is it vulnerable?

    happy New Year

    • Barry de Graaff January 20, 2022 at 11:09 AM #

      Happy New year to you as well, Version 8.8.11 is out-of-date and unsupported, and you should update to a supported version of Zimbra.

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