- **Patch**: new --> needs_work
- **Type**: --> Enhancement
- **Comment**:
This now fails make - did you rebase?
---
** [issues:#5243] Fix security problem in lilypond-invoke-editor**
**Status:** Started
**Created:** Thu Nov 23, 2017 08:35 AM UTC by Knut Petersen
**Last Updated:** Fri Nov 24, 2017 05:57 PM UTC
**Owner:** Knut Petersen
Fix security problem in lilypond-invoke-editor
If lilypond-invoke-editor was installed as a general
uri-helper it was easy to abuse it to execute arbitrary
code on an attacked system for non-textedit URIs.
This part of the problem was discovered and reported
to our bug-lilypond mailing list by Gabriel Corona.
But also pure textedit URIs were vulnerable, an
example is the URI
textedit:///:&xterm -e find ~/&:x:
that executes "find ~/" in a xterm.
With this patch lilypond-invoke-editor only
handles textedit URIs, and it does no longer
use the systems command processor but
guiles system* procedure for those URIs.
Also the script will abort if the line, char and
column fields of a textedit URI contain anything
but digits.
We could have fixed URI passing to the browser,
but it is not our job to provide a general URI helper.
Other software (e.g. xdg-open and friends) should
be used for that.
The security problem fixed now was introduced
into lilypond in the year 2005.
Signed-off-by: Knut Petersen <knut_peter...@t-online.de>
http://codereview.appspot.com/336240043
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