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Cross site scripting vulnerability #2336

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drgrice1 opened this issue Feb 23, 2024 · 1 comment
Open

Cross site scripting vulnerability #2336

drgrice1 opened this issue Feb 23, 2024 · 1 comment

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@drgrice1
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This was reported in https://webwork.maa.org/moodle/mod/forum/discuss.php?d=4295 (4 years ago), and I don't know why an issue was not made at that time. The issue is with how we use the status_message URL parameter to pass html when redirects occur. An example of this in action was given in that forum post. Here is a simpler example that work now:

https://your.server.domain/webwork2/courseID?status_message=<script>console.log('hello')</script>

The console.log does get executed.

The approach of passing HTML in a URL parameter, and then injecting that into the DOM without begin properly sanitized is a clear vulnerability. There is a note in the forum post about using HTML::Scrubber to sanitize input, but I do not believe this URL parameter has ever been put through any such scrutiny. Furthermore, I don't think that even HTML::Scrubber would catch the instance noted in that post. That is (modified a bit):

https://your.server.com/webwork2/courseID?status_message=<audio%20src=x%20onerror=alert('hello')>

The alert in that is executed also. HTML::Scrubber might catch the first example with a script tag, but wouldn't catch the onerror attribute.

The good news is that with #2332 there is a safe mechanism that could be implemented to pass such messages securely via the session without using a URL parameter.

I am noting this issue mainly for myself to work on.
@drgrice1
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I should note that this does not affect the internal status_message usage that is not passed through a URL parameter. So addmessage and methods that go through that (addbadmessage and addgoodmessage) are not a problem when they only use internal content. It is passing the status_message URL parameter into those methods that is the problem.

drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 23, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
846c6a6 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
@drgrice1 drgrice1 mentioned this issue Feb 23, 2024
Merged
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 23, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
50a053f 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 24, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
b24c81a 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 24, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
4bc3c5e 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 24, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
9ab4bd6 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 24, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
b07a435 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 25, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
08a2266 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 29, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
8bdbd5a 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 29, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
82adb4a 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Feb 29, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
1929b8c 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 2, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
322d227 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 5, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
4a86211 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 6, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
b276f80 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 7, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
b8d8db0 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 14, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
901c933 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 16, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
6683ea6 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 17, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
ef6f424 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 17, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
d1486bc 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 18, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
df95c82 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 18, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
fe6e868 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 20, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
0785b70 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
drgrice1 added a commit to drgrice1/webwork2 that referenced this issue Mar 22, 2024
@drgrice1
Add a session flash and use it to pass status messages for redirects.
1354fc4 
The session `flash` method is similar to the `session` method added
previously, and is a method of the WeBWorK::Authen object attached to
the controller.  It uses the `flash` method of
`Mojolicious::Plugin::DefaultHelpers` if `session_management_via` is
"session_cookie" and imitates that with the database session otherwise.
This method saves data to the session that will persist only for the
next request.

This is then used to save `status_messages` when redirects occur.  This
fixes issue openwebwork#2336, since the `status_message` URL parameter is no longer
used. We need to make sure that we never again use a URL parameter to
pass HTML.
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