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ImageMagick.8768
ImageMagick-CVE-2017-10995.patch
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File ImageMagick-CVE-2017-10995.patch of Package ImageMagick.8768
Index: ImageMagick-6.8.8-1/coders/png.c =================================================================== --- ImageMagick-6.8.8-1.orig/coders/png.c 2018-01-12 10:47:20.663212943 +0100 +++ ImageMagick-6.8.8-1/coders/png.c 2018-01-12 10:56:35.740484275 +0100 @@ -5269,7 +5269,7 @@ static Image *ReadOneMNGImage(MngInfo* m if (length) repeat=p[0]; - if (repeat == 3) + if (repeat == 3 && length > 8) { final_delay=(png_uint_32) mng_get_long(&p[2]); mng_iterations=(png_uint_32) mng_get_long(&p[6]); @@ -5303,69 +5303,72 @@ static Image *ReadOneMNGImage(MngInfo* m CoderError,"DEFI chunk found in MNG-VLC datastream","`%s'", image->filename); - object_id=(p[0] << 8) | p[1]; - - if (mng_type == 2 && object_id != 0) - (void) ThrowMagickException(&image->exception,GetMagickModule(), - CoderError,"Nonzero object_id in MNG-LC datastream","`%s'", - image->filename); - - if (object_id > MNG_MAX_OBJECTS) + if (length > 1) { - /* - Instead of using a warning we should allocate a larger - MngInfo structure and continue. - */ - (void) ThrowMagickException(&image->exception,GetMagickModule(), - CoderError,"object id too large","`%s'",image->filename); - object_id=MNG_MAX_OBJECTS; - } + object_id=(p[0] << 8) | p[1]; - if (mng_info->exists[object_id]) - if (mng_info->frozen[object_id]) - { - chunk=(unsigned char *) RelinquishMagickMemory(chunk); - (void) ThrowMagickException(&image->exception, - GetMagickModule(),CoderError, - "DEFI cannot redefine a frozen MNG object","`%s'", - image->filename); - continue; - } + if (mng_type == 2 && object_id != 0) + (void) ThrowMagickException(&image->exception, + GetMagickModule(), + CoderError,"Nonzero object_id in MNG-LC datastream", + "`%s'", image->filename); - mng_info->exists[object_id]=MagickTrue; + if (object_id > MNG_MAX_OBJECTS) + { + /* + Instead of using a warning we should allocate a larger + MngInfo structure and continue. + */ + (void) ThrowMagickException(&image->exception, + GetMagickModule(), CoderError, + "object id too large","`%s'",image->filename); + object_id=MNG_MAX_OBJECTS; + } - if (length > 2) - mng_info->invisible[object_id]=p[2]; + if (mng_info->exists[object_id]) + if (mng_info->frozen[object_id]) + { + chunk=(unsigned char *) RelinquishMagickMemory(chunk); + (void) ThrowMagickException(&image->exception, + GetMagickModule(),CoderError, + "DEFI cannot redefine a frozen MNG object","`%s'", + image->filename); + continue; + } - /* - Extract object offset info. - */ - if (length > 11) - { - mng_info->x_off[object_id]=(ssize_t) ((p[4] << 24) | - (p[5] << 16) | (p[6] << 8) | p[7]); + mng_info->exists[object_id]=MagickTrue; - mng_info->y_off[object_id]=(ssize_t) ((p[8] << 24) | - (p[9] << 16) | (p[10] << 8) | p[11]); + if (length > 2) + mng_info->invisible[object_id]=p[2]; - if (logging != MagickFalse) + /* + Extract object offset info. + */ + if (length > 11) { - (void) LogMagickEvent(CoderEvent,GetMagickModule(), - " x_off[%d]: %.20g",object_id,(double) - mng_info->x_off[object_id]); - - (void) LogMagickEvent(CoderEvent,GetMagickModule(), - " y_off[%d]: %.20g",object_id,(double) - mng_info->y_off[object_id]); + mng_info->x_off[object_id]=(ssize_t) ((p[4] << 24) | + (p[5] << 16) | (p[6] << 8) | p[7]); + + mng_info->y_off[object_id]=(ssize_t) ((p[8] << 24) | + (p[9] << 16) | (p[10] << 8) | p[11]); + + if (logging != MagickFalse) + { + (void) LogMagickEvent(CoderEvent,GetMagickModule(), + " x_off[%d]: %.20g, y_off[%d]: %.20g", + object_id,(double) mng_info->x_off[object_id], + object_id,(double) mng_info->y_off[object_id]); + } } - } - /* - Extract object clipping info. - */ - if (length > 27) - mng_info->object_clip[object_id]=mng_read_box(mng_info->frame,0, - &p[12]); + /* + Extract object clipping info. + */ + + if (length > 27) + mng_info->object_clip[object_id]= + mng_read_box(mng_info->frame,0, &p[12]); + } chunk=(unsigned char *) RelinquishMagickMemory(chunk); continue; @@ -5568,7 +5571,7 @@ static Image *ReadOneMNGImage(MngInfo* m frame_timeout=default_frame_timeout; fb=default_fb; - if (length) + if (length > 0) if (p[0]) mng_info->framing_mode=p[0]; @@ -5599,10 +5602,10 @@ static Image *ReadOneMNGImage(MngInfo* m change_clipping=(*p++); p++; /* change_sync */ - if (change_delay) + if (change_delay && (p-chunk) < (ssize_t) (length-4)) { - frame_delay=1UL*image->ticks_per_second* - mng_get_long(p); + frame_delay=1UL*image->ticks_per_second* + mng_get_long(p); if (mng_info->ticks_per_second != 0) frame_delay/=mng_info->ticks_per_second; @@ -5620,7 +5623,7 @@ static Image *ReadOneMNGImage(MngInfo* m " Framing_delay=%.20g",(double) frame_delay); } - if (change_timeout) + if (change_timeout && (p-chunk) < (ssize_t) (length-4)) { frame_timeout=1UL*image->ticks_per_second* mng_get_long(p); @@ -5641,7 +5644,7 @@ static Image *ReadOneMNGImage(MngInfo* m " Framing_timeout=%.20g",(double) frame_timeout); } - if (change_clipping) + if (change_clipping && (p-chunk) < (ssize_t) (length-16)) { fb=mng_read_box(previous_fb,(char) p[0],&p[1]); p+=17; @@ -5731,20 +5734,23 @@ static Image *ReadOneMNGImage(MngInfo* m /* Read CLIP. */ - first_object=(p[0] << 8) | p[1]; - last_object=(p[2] << 8) | p[3]; + if (length > 3) + { + first_object=(p[0] << 8) | p[1]; + last_object=(p[2] << 8) | p[3]; + p+=4; - for (i=(int) first_object; i <= (int) last_object; i++) - { - if ((i < 0) || (i >= MNG_MAX_OBJECTS)) - continue; - if (mng_info->exists[i] && !mng_info->frozen[i]) + for (i=(int) first_object; i <= (int) last_object; i++) { - MngBox - box; - - box=mng_info->object_clip[i]; - mng_info->object_clip[i]=mng_read_box(box,(char) p[4],&p[5]); + if (mng_info->exists[i] && !mng_info->frozen[i]) + { + MngBox + box; + box=mng_info->object_clip[i]; + if ((p-chunk) < (ssize_t) (length-17)) + mng_info->object_clip[i]= + mng_read_box(box,(char) p[0],&p[1]); + } } } @@ -5805,26 +5811,29 @@ static Image *ReadOneMNGImage(MngInfo* m /* read MOVE */ - first_object=(p[0] << 8) | p[1]; - last_object=(p[2] << 8) | p[3]; - for (i=(ssize_t) first_object; i <= (ssize_t) last_object; i++) + if (length > 3) { - if ((i < 0) || (i >= MNG_MAX_OBJECTS)) - continue; - if (mng_info->exists[i] && !mng_info->frozen[i]) - { - MngPair - new_pair; + first_object=(p[0] << 8) | p[1]; + last_object=(p[2] << 8) | p[3]; + p+=4; - MngPair - old_pair; - - old_pair.a=mng_info->x_off[i]; - old_pair.b=mng_info->y_off[i]; - new_pair=mng_read_pair(old_pair,(int) p[4],&p[5]); - mng_info->x_off[i]=new_pair.a; - mng_info->y_off[i]=new_pair.b; - } + for (i=(ssize_t) first_object; i <= (ssize_t) last_object; i++) + { + if (mng_info->exists[i] && !mng_info->frozen[i] && + (p-chunk) < (ssize_t) (length-8)) + { + MngPair + new_pair; + MngPair + old_pair; + + old_pair.a=mng_info->x_off[i]; + old_pair.b=mng_info->y_off[i]; + new_pair=mng_read_pair(old_pair,(int) p[0],&p[1]); + mng_info->x_off[i]=new_pair.a; + mng_info->y_off[i]=new_pair.b; + } + } } chunk=(unsigned char *) RelinquishMagickMemory(chunk); @@ -5834,27 +5843,30 @@ static Image *ReadOneMNGImage(MngInfo* m if (memcmp(type,mng_LOOP,4) == 0) { ssize_t loop_iters=1; - loop_level=chunk[0]; - mng_info->loop_active[loop_level]=1; /* mark loop active */ + if (length > 0) /* To do: check spec, if empty LOOP is allowed */ + { + loop_level=chunk[0]; + mng_info->loop_active[loop_level]=1; /* mark loop active */ - /* Record starting point. */ - loop_iters=mng_get_long(&chunk[1]); + /* Record starting point. */ + loop_iters=mng_get_long(&chunk[1]); - if (logging != MagickFalse) - (void) LogMagickEvent(CoderEvent,GetMagickModule(), - " LOOP level %.20g has %.20g iterations ",(double) loop_level, - (double) loop_iters); + if (logging != MagickFalse) + (void) LogMagickEvent(CoderEvent,GetMagickModule(), + " LOOP level %.20g has %.20g iterations ", + (double) loop_level, (double) loop_iters); - if (loop_iters == 0) - skipping_loop=loop_level; + if (loop_iters == 0) + skipping_loop=loop_level; - else - { - mng_info->loop_jump[loop_level]=TellBlob(image); - mng_info->loop_count[loop_level]=loop_iters; - } + else + { + mng_info->loop_jump[loop_level]=TellBlob(image); + mng_info->loop_count[loop_level]=loop_iters; + } - mng_info->loop_iteration[loop_level]=0; + mng_info->loop_iteration[loop_level]=0; + } chunk=(unsigned char *) RelinquishMagickMemory(chunk); continue; } @@ -6134,33 +6146,36 @@ static Image *ReadOneMNGImage(MngInfo* m mng_info->basi_warning++; #ifdef MNG_BASI_SUPPORTED - basi_width=(size_t) ((p[0] << 24) | (p[1] << 16) | - (p[2] << 8) | p[3]); - basi_height=(size_t) ((p[4] << 24) | (p[5] << 16) | - (p[6] << 8) | p[7]); - basi_color_type=p[8]; - basi_compression_method=p[9]; - basi_filter_type=p[10]; - basi_interlace_method=p[11]; if (length > 11) + { + basi_width=(size_t) ((p[0] << 24) | (p[1] << 16) | + (p[2] << 8) | p[3]); + basi_height=(size_t) ((p[4] << 24) | (p[5] << 16) | + (p[6] << 8) | p[7]); + basi_color_type=p[8]; + basi_compression_method=p[9]; + basi_filter_type=p[10]; + basi_interlace_method=p[11]; + } + if (length > 13) basi_red=(p[12] << 8) & p[13]; else basi_red=0; - if (length > 13) + if (length > 15) basi_green=(p[14] << 8) & p[15]; else basi_green=0; - if (length > 15) + if (length > 17) basi_blue=(p[16] << 8) & p[17]; else basi_blue=0; - if (length > 17) + if (length > 19) basi_alpha=(p[18] << 8) & p[19]; else @@ -6171,7 +6186,7 @@ static Image *ReadOneMNGImage(MngInfo* m basi_alpha=255; } - if (length > 19) + if (length > 20) basi_viewable=p[20]; else
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