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List: graphicsmagick-commit
Subject: [GM-commit] GraphicsMagick: ReadMNGImage(): mng_LOOP chunk must be at least ...
From: GraphicsMagick Commits <graphicsmagick-commit () lists ! sourceforge ! net>
Date: 2018-09-20 13:34:23
Message-ID: mailman.17027.1537450474.1387.graphicsmagick-commit () lists ! sourceforge ! net
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changeset 2c147f7b970a in /hg/GraphicsMagick
details: http://hg.GraphicsMagick.org/hg/GraphicsMagick?cmd=changeset;node=2c147f7b970a
summary: ReadMNGImage(): mng_LOOP chunk must be at least 5 bytes long. (Credit to \
OSS-Fuzz)
diffstat:
ChangeLog | 7 +++++++
VisualMagick/installer/inc/version.isx | 4 ++--
coders/png.c | 12 +++++++++---
magick/version.h | 4 ++--
www/Changelog.html | 9 +++++++++
5 files changed, 29 insertions(+), 7 deletions(-)
diffs (93 lines):
diff -r 90ff9f04a465 -r 2c147f7b970a ChangeLog
--- a/ChangeLog Sat Sep 15 14:21:14 2018 -0500
+++ b/ChangeLog Thu Sep 20 08:34:20 2018 -0500
@@ -1,3 +1,10 @@
+2018-09-20 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
+
+ * coders/png.c (ReadMNGImage): mng_LOOP chunk must be at least 5
+ bytes long. Fixes oss-fuzz 10455
+ "graphicsmagick/coder_MNG_fuzzer: Use-of-uninitialized-value in
+ ReadMNGImage". (Credit to OSS-Fuzz)
+
2018-09-15 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
* magick/render.c (TraceEllipse): Detect arithmetic overflow when
diff -r 90ff9f04a465 -r 2c147f7b970a VisualMagick/installer/inc/version.isx
--- a/VisualMagick/installer/inc/version.isx Sat Sep 15 14:21:14 2018 -0500
+++ b/VisualMagick/installer/inc/version.isx Thu Sep 20 08:34:20 2018 -0500
@@ -10,5 +10,5 @@
#define public MagickPackageName "GraphicsMagick"
#define public MagickPackageVersion "1.4"
-#define public MagickPackageVersionAddendum ".020180915"
-#define public MagickPackageReleaseDate "snapshot-20180915"
+#define public MagickPackageVersionAddendum ".020180920"
+#define public MagickPackageReleaseDate "snapshot-20180920"
diff -r 90ff9f04a465 -r 2c147f7b970a coders/png.c
--- a/coders/png.c Sat Sep 15 14:21:14 2018 -0500
+++ b/coders/png.c Thu Sep 20 08:34:20 2018 -0500
@@ -5023,15 +5023,15 @@
{
long loop_iters=1;
- if (length > 0) /* To do: check spec, if empty LOOP is allowed */
+ if (length >= 5) /* To do: check spec, if empty LOOP is allowed */
{
- loop_level=chunk[0];
+ loop_level=chunk[0]; /* 1 byte */
loops_active++;
mng_info->loop_active[loop_level]=1; /* mark loop active */
/*
Record starting point.
*/
- loop_iters=mng_get_long(&chunk[1]);
+ loop_iters=mng_get_long(&chunk[1]); /* 4 bytes */
if (loop_iters <= 0)
skipping_loop=loop_level;
else
@@ -5060,6 +5060,12 @@
}
mng_info->loop_iteration[loop_level]=0;
}
+ else
+ {
+ if (logging)
+ (void) LogMagickEvent(CoderEvent,GetMagickModule(),
+ "Ignoring short LOOP chunk (%lu bytes)", \
length); + }
MagickFreeMemory(chunk);
continue;
}
diff -r 90ff9f04a465 -r 2c147f7b970a magick/version.h
--- a/magick/version.h Sat Sep 15 14:21:14 2018 -0500
+++ b/magick/version.h Thu Sep 20 08:34:20 2018 -0500
@@ -38,8 +38,8 @@
#define MagickLibVersion 0x211801
#define MagickLibVersionText "1.4"
#define MagickLibVersionNumber 21,18,1
-#define MagickChangeDate "20180915"
-#define MagickReleaseDate "snapshot-20180915"
+#define MagickChangeDate "20180920"
+#define MagickReleaseDate "snapshot-20180920"
/*
The MagickLibInterfaceNewest and MagickLibInterfaceOldest defines
diff -r 90ff9f04a465 -r 2c147f7b970a www/Changelog.html
--- a/www/Changelog.html Sat Sep 15 14:21:14 2018 -0500
+++ b/www/Changelog.html Thu Sep 20 08:34:20 2018 -0500
@@ -35,6 +35,15 @@
<div class="document">
+<p>2018-09-20 Bob Friesenhahn <<a class="reference external" \
href="mailto:bfriesen%40simple.dallas.tx.us">bfriesen<span> \
4;</span>simple<span>.</span>dallas<span>.</span>tx<span>.</span>us</a>></p>
+<blockquote>
+<ul class="simple">
+<li>coders/png.c (ReadMNGImage): mng_LOOP chunk must be at least 5
+bytes long. Fixes oss-fuzz 10455
+"graphicsmagick/coder_MNG_fuzzer: Use-of-uninitialized-value in
+ReadMNGImage". (Credit to OSS-Fuzz)</li>
+</ul>
+</blockquote>
<p>2018-09-15 Bob Friesenhahn <<a class="reference external" \
href="mailto:bfriesen%40simple.dallas.tx.us">bfriesen<span> \
4;</span>simple<span>.</span>dallas<span>.</span>tx<span>.</span>us</a>></p>
<blockquote>
<ul class="simple">
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