https://bz.apache.org/bugzilla/show_bug.cgi?id=69752
Bug ID: 69752
Summary: HOST appBase = "" accepted as valid option
Product: Tomcat 9
Version: 9.0.102
Hardware: PC
OS: Linux
Status: NEW
Severity: major
Priority: P2
Component: Connectors
Assignee: dev@tomcat.apache.org
Reporter: apa...@resellerdesktop.de
Target Milestone: -----
The appBase argument for the Host-Element accepts an empty string "".
This leads to exposing all directories in the tomcat base directory to simple
requests like http://domain/conf/server.xml .
it's HIGHLY UNLIKELY that any user will ever leave this empty on purpose to do
exactly exposing his server config to the public this way.
Requested Fix:
set appBase to "webapps" if appBase :
- is found empty
- is the base directory
- is a symlink to the base directory
- is "conf" or contains "conf/"
never allow tomcat-users.xml or any security related file to be read.
I was shocked to see this be possible in the wild :(
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