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From 78c2e3d70d29698244f70164428bd2868c0ab34c Mon Sep 17 00:00:00 2001
From: Alan Coopersmith <alan.coopersmith@oracle.com>
Date: Fri, 6 Feb 2015 15:54:00 -0800
Subject: bdfReadCharacters: bailout if a char's bitmap cannot be read
[CVE-2015-1803]
Previously would charge on ahead with a NULL pointer in ci->bits, and
then crash later in FontCharInkMetrics() trying to access the bits.
Found with afl-1.23b.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
diff --git a/src/bitmap/bdfread.c b/src/bitmap/bdfread.c
index 6387908..1b29b81 100644
--- a/src/bitmap/bdfread.c
+++ b/src/bitmap/bdfread.c
@@ -458,7 +458,10 @@ bdfReadCharacters(FontFilePtr file, FontPtr pFont, bdfFileState *pState,
ci->metrics.descent = -bb;
ci->metrics.characterWidth = wx;
ci->bits = NULL;
- bdfReadBitmap(ci, file, bit, byte, glyph, scan, bitmapsSizes);
+ if (!bdfReadBitmap(ci, file, bit, byte, glyph, scan, bitmapsSizes)) {
+ bdfError("could not read bitmap for character '%s'\n", charName);
+ goto BAILOUT;
+ }
ci++;
ndx++;
} else
--
cgit v0.10.2
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