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31 lines
1.1 KiB
Diff
31 lines
1.1 KiB
Diff
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From 2deda9906480f9c8ae07b8c2a5510cc7e4c59a8e Mon Sep 17 00:00:00 2001
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From: Alan Coopersmith <alan.coopersmith@oracle.com>
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Date: Fri, 6 Feb 2015 15:50:45 -0800
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Subject: bdfReadProperties: property count needs range check [CVE-2015-1802]
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Avoid integer overflow or underflow when allocating memory arrays
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by multiplying the number of properties reported for a BDF font.
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Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
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Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
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Reviewed-by: Julien Cristau <jcristau@debian.org>
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diff --git a/src/bitmap/bdfread.c b/src/bitmap/bdfread.c
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index 914a024..6387908 100644
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--- a/src/bitmap/bdfread.c
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+++ b/src/bitmap/bdfread.c
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@@ -604,7 +604,9 @@ bdfReadProperties(FontFilePtr file, FontPtr pFont, bdfFileState *pState)
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bdfError("missing 'STARTPROPERTIES'\n");
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return (FALSE);
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}
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- if (sscanf((char *) line, "STARTPROPERTIES %d", &nProps) != 1) {
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+ if ((sscanf((char *) line, "STARTPROPERTIES %d", &nProps) != 1) ||
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+ (nProps <= 0) ||
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+ (nProps > ((INT32_MAX / sizeof(FontPropRec)) - BDF_GENPROPS))) {
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bdfError("bad 'STARTPROPERTIES'\n");
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return (FALSE);
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}
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--
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cgit v0.10.2
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