[Bug 63461] New: HEAD request with a 404 and custom ErrorPage causes corrupt and mixed-up responses

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[Bug 63461] New: HEAD request with a 404 and custom ErrorPage causes corrupt and mixed-up responses

Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63461

            Bug ID: 63461
           Summary: HEAD request with a 404 and custom ErrorPage causes
                    corrupt and mixed-up responses
           Product: Apache httpd-2
           Version: 2.4.6
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Core
          Assignee: [hidden email]
          Reporter: [hidden email]
  Target Milestone: ---

The setup uses mod_proxy and custom 404 ErrorPage that is served by Tomcat via
http. When HEAD request is made to Apache and results in 404, Apache makes GET
request to the custom ErrorPage url on Tomcat that is returning a fairly large
html page. At this point the headers Apache returns to the original caller are
all mixed-up, it seems to serve data from some other requests and it all feels
like some buffer overflow, it also corrupts other http requests that are
executing concurrently on the Apache instance and they start returning garbage
as well. When 404 HEAD requests are stopped it all goes back to normal.

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[Bug 63461] HEAD request with a 404 and custom ErrorPage causes corrupt and mixed-up responses

Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63461

Neil Hanlon <[hidden email]> changed:

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                 CC|                            |[hidden email]

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[Bug 63461] HEAD request with a 404 and custom ErrorPage causes corrupt and mixed-up responses

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63461

--- Comment #1 from Ruediger Pluem <[hidden email]> ---
2.4.6 is very outdated. If the binaries are delivered by e.g. a Linux
distribution, please open a case / ticket with them as we do not know which
patches they added on top of 2.4.6. Otherwise please try to reproduce the issue
with 2.4.39. In any case if the issue persists more details about your
configuration are needed. We need your proxy and errorpage configuration. Feel
free to replace IP's and hostnames with dummy addresses / names.
Are there any entries in the error log?

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[Bug 63461] HEAD request with a 404 and custom ErrorPage causes corrupt and mixed-up responses

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63461

Eric Covener <[hidden email]> changed:

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[Bug 63461] HEAD request with a 404 and custom ErrorPage causes corrupt and mixed-up responses

Bugzilla from bugzilla@apache.org
In reply to this post by Bugzilla from bugzilla@apache.org
https://bz.apache.org/bugzilla/show_bug.cgi?id=63461

--- Comment #2 from Alex <[hidden email]> ---
We built Apache 2.4.39 and can not reproduce the issue on that build.
We will file a new issue with RedHat. It's reproducible in
"httpd-2.4.6-88.el7.centos.x86_64".

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