27 lines
923 B
Diff
27 lines
923 B
Diff
From: Ludovic Rousseau <rousseau@debian.org>
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Date: Wed Sep 5 15:32:00 CEST 2018
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Subject: Fix heap buffer overflow
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Bug-Debian: http://bugs.debian.org/907925
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Description: Fix CVE-2018-17088
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--- gpsinfo.c
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+++ gpsinfo.c
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@@ -4,6 +4,7 @@
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// Matthias Wandel, Dec 1999 - Dec 2002
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//--------------------------------------------------------------------------
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#include "jhead.h"
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+#include <stdint.h>
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#define MAX_GPS_TAG 0x1e
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@@ -101,7 +102,7 @@
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unsigned OffsetVal;
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OffsetVal = Get32u(DirEntry+8);
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// If its bigger than 4 bytes, the dir entry contains an offset.
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- if (OffsetVal+ByteCount > ExifLength){
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+ if (OffsetVal > UINT32_MAX - ByteCount || OffsetVal+ByteCount > ExifLength){
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// Bogus pointer offset and / or bytecount value
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ErrNonfatal("Illegal value pointer for Exif gps tag %04x", Tag,0);
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continue;
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