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: [email protected]
Reporter: [email protected]
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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