Revision as of 22:13, 18 January 2017 by Plobbes (talk | contribs) (added note on Cookies JSESSIONID and ZM_AUTH_TOKEN / bug 91298)

Security Pointers and Tidbits

The main jumping point for security is the Security Center.

Release Specific Settings

Odds and Ends

Here are a few questions that come up from time to time...

An OS Patch/Bug/Vulnerability was announced, is Zimbra affected?

Best practice dictates that you always stay up to date with vendor provided OS patches. Also, be sure to follow OS recommended best practices when applying patches (e.g. restarting affected services, tools like needs-restarting, needrestart and checkrestart may be helpful when trying to understand which processes are using files that were replaced by a patch). When in doubt about the status of a system after a patch, go ahead and reboot to ensure the patches take effect.

Cookie ZM_TEST cookie is missing the HttpOnly attribute, is this a problem?

The ZM_TEST cookie in ZCS is used solely to determine if cookies are enabled a the browser. There are no privileges associated with that cookie. As such, there is no inherent risk with not having an HttpOnly attribute on this cookie.

Cookies JSESSIONID and ZM_AUTH_TOKEN are missing the Secure attribute, why?

Typically this is an indication of one of the following (ref: bug 91298):

  • a configuration problem - zimbraReverseProxySSLToUpstreamEnabled has been set to FALSE instead of TRUE
  • a site that is performing SSL/TLS offloading - consider adding the Secure attribute via the device that is performing the offloading
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