|From:||Auto mailings of changes to Lily Issues via Testlilyissues-auto|
|Subject:||[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5243 Fix security problem in lilypond-invoke-editor|
|Date:||Tue, 16 Jan 2018 13:21:36 -0000|
Patch on countdown for Jan 19th
[issues:#5243] Fix security problem in lilypond-invoke-editor
Created: Thu Nov 23, 2017 08:35 AM UTC by Knut Petersen
Last Updated: Sat Jan 13, 2018 09:53 AM UTC
Owner: David Kastrup
David Kastrup - 22 hours ago
More conservative parsing of textedit URIs
Also contains commits:
Let get-editor use shell-quote-argument
Addresses security concerns.
(editor scm): Add shell-quote-argument function
This is mostly stolen from Emacs.
I have no idea how to properly test this or whether it runs at all.
Initial issue for this Tracker (replace by the info above):
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
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 address@hidden
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