65 lines
2.4 KiB
Diff
65 lines
2.4 KiB
Diff
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Fix invalid read in t2p_writeproc():
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http://bugzilla.maptools.org/show_bug.cgi?id=2639
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2016-12-20 Even Rouault <even.rouault at spatialys.com>
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* tools/tiff2pdf.c: avoid potential invalid memory read in
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t2p_writeproc.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2639
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/cvs/maptools/cvsroot/libtiff/ChangeLog,v <-- ChangeLog
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new revision: 1.1198; previous revision: 1.1197
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/cvs/maptools/cvsroot/libtiff/tools/tiff2pdf.c,v <-- tools/tiff2pdf.c
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new revision: 1.100; previous revision: 1.99
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Index: libtiff/tools/tiff2pdf.c
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===================================================================
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RCS file: /cvs/maptools/cvsroot/libtiff/tools/tiff2pdf.c,v
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retrieving revision 1.99
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retrieving revision 1.100
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diff -u -r1.99 -r1.100
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--- libtiff/tools/tiff2pdf.c 20 Dec 2016 17:13:26 -0000 1.99
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+++ libtiff/tools/tiff2pdf.c 20 Dec 2016 17:24:35 -0000 1.100
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@@ -2896,6 +2896,7 @@
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}
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if(TIFFGetField(input, TIFFTAG_JPEGTABLES, &count, &jpt) != 0) {
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if (count >= 4) {
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+ int retTIFFReadRawTile;
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/* Ignore EOI marker of JpegTables */
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_TIFFmemcpy(buffer, jpt, count - 2);
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bufferoffset += count - 2;
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@@ -2903,22 +2904,23 @@
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table_end[0] = buffer[bufferoffset-2];
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table_end[1] = buffer[bufferoffset-1];
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xuint32 = bufferoffset;
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- bufferoffset -= 2;
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- bufferoffset += TIFFReadRawTile(
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+ bufferoffset -= 2;
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+ retTIFFReadRawTile= TIFFReadRawTile(
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input,
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tile,
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(tdata_t) &(((unsigned char*)buffer)[bufferoffset]),
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-1);
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+ if( retTIFFReadRawTile < 0 )
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+ {
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+ _TIFFfree(buffer);
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+ t2p->t2p_error = T2P_ERR_ERROR;
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+ return(0);
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+ }
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+ bufferoffset += retTIFFReadRawTile;
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/* Overwrite SOI marker of image scan with previously */
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/* saved end of JpegTables */
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buffer[xuint32-2]=table_end[0];
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buffer[xuint32-1]=table_end[1];
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- } else {
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- bufferoffset += TIFFReadRawTile(
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- input,
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- tile,
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- (tdata_t) &(((unsigned char*)buffer)[bufferoffset]),
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- -1);
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}
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}
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t2pWriteFile(output, (tdata_t) buffer, bufferoffset);
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