A new security patch has been released to further address CVE-2022-27924.
This issue has been ranked as High by the Zimbra Team and we recommend that you use the most recent release available to avoid any issues.
https://blog.zimbra.com/2022/05/new-zimbra-security-patches-9-0-0-patch-24-1-and-8-8-15-patch-31-1/ (May 10th 2022)

8.8.15 P31.1 proxy / webapp failure.

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8.8.15 P31.1 proxy / webapp failure.

Postby rsmith999 » Fri May 13, 2022 9:06 pm

We had our first issue with Zimbra suddenly becoming unavailable (webapp).

Nginx log:

2022/05/13 13:17:07 [error] 3133#0: *1073506 no live upstreams while connecting to upstream,
upstream timed out (110: Connection timed out) while SSL handshaking to upstream

Mail log showed mail not flowing (appears as entire proxy service was down).
Is there a log to take a look at to determine why proxy would have been unresponsive? Zmcontrol status showed that proxy was running but not processing requests.
I think I am limited to the nginx logs?

I am very suspicious that this is related to P31.1 because we have never seen an issue like this in the many years we have been running Zimbra OSE.
Has anyone else experienced this issue post patch?

Last edited by rsmith999 on Sun May 15, 2022 9:20 pm, edited 1 time in total.

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L. Mark Stone
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ZCS/ZD Version: 8.8.15 Network Edition

Re: 8.8.15 P31.1 proxy / webapp failure.

Postby L. Mark Stone » Sat May 14, 2022 8:23 pm

502 errors are posted by the proxy service, so I suspect proxy is running. The text of the error says that no upstream servers can be contacted. That means mailboxd (if a single server) or a separate mailbox server is not responding to the proxy's request.

mailbox.log and zmmailboxd.out are where I would look next.

Hope that helps,
L. Mark Stone
Mission Critical Email - Zimbra VAR/BSP/Training Partner https://www.missioncriticalemail.com/
Zeta Alliance http://www.zetalliance.org/

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