From 43bc256d8ae44b92d2734a3c5bc73957a4d7c1ec Mon Sep 17 00:00:00 2001 From: erouault Date: Sat, 3 Dec 2016 11:15:18 +0000 Subject: [PATCH] * libtiff/tif_ojpeg.c: make OJPEGDecode() early exit in case of failure in OJPEGPreDecode(). This will avoid a divide by zero, and potential other issues. Reported by Agostino Sarubbo. Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2611 Fixes CVE-2016-10267 Signed-off-by: Peter Korsgaard --- libtiff/tif_ojpeg.c | 8 ++++++++ 1 files changed, 15 insertions(+) diff --git a/libtiff/tif_ojpeg.c b/libtiff/tif_ojpeg.c index 1ccc3f9b..f19e8fd0 100644 --- a/libtiff/tif_ojpeg.c +++ b/libtiff/tif_ojpeg.c @@ -244,6 +244,7 @@ typedef enum { typedef struct { TIFF* tif; + int decoder_ok; #ifndef LIBJPEG_ENCAP_EXTERNAL JMP_BUF exit_jmpbuf; #endif @@ -722,6 +723,7 @@ OJPEGPreDecode(TIFF* tif, uint16 s) } sp->write_curstrile++; } + sp->decoder_ok = 1; return(1); } @@ -784,8 +786,14 @@ OJPEGPreDecodeSkipScanlines(TIFF* tif) static int OJPEGDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s) { + static const char module[]="OJPEGDecode"; OJPEGState* sp=(OJPEGState*)tif->tif_data; (void)s; + if( !sp->decoder_ok ) + { + TIFFErrorExt(tif->tif_clientdata,module,"Cannot decode: decoder not correctly initialized"); + return 0; + } if (sp->libjpeg_jpeg_query_style==0) { if (OJPEGDecodeRaw(tif,buf,cc)==0) -- 2.11.0