libsixel
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description
An issue was discovered in libsixel 1.8.2, There is an integer overflow in function sixel_encode_body at tosixel.c:562-38
commandline
img2sixel @@ -o /dev/null
source
558 }
559 for (x = 0; x < width; x++) {
560 pix = pixels[y * width + x]; /* color index */
561 if (pix >= 0 && pix < ncolors && pix != keycolor) {
> 562 map[pix * width + x] |= (1 << i);
563 }
564 else if (!palstate) {
565 fillable = 0;
566 }
567 }bug report
ASAN:DEADLYSIGNAL
=================================================================
==23526==ERROR: AddressSanitizer: SEGV on unknown address 0x7f1651943dc8 (pc 0x7f17a65b9d04 bp 0x7ffecb75fbd0 sp 0x7ffecb75fa00 T0)
#0 0x7f17a65b9d03 in sixel_encode_body /src/libsixel/src/tosixel.c:562:38
#1 0x7f17a65b30ce in sixel_encode_dither /src/libsixel/src/tosixel.c:802:14
#2 0x7f17a65b30ce in sixel_encode /src/libsixel/src/tosixel.c:1488
#3 0x7f17a66b31ee in sixel_encoder_output_without_macro /src/libsixel/src/encoder.c:820:14
#4 0x7f17a66b31ee in sixel_encoder_encode_frame /src/libsixel/src/encoder.c:1050
#5 0x7f17a6608883 in load_with_builtin /src/libsixel/src/loader.c:913:14
#6 0x7f17a6608883 in sixel_helper_load_image_file /src/libsixel/src/loader.c:1352
#7 0x7f17a66b05bc in sixel_encoder_encode /src/libsixel/src/encoder.c:1737:14
#8 0x4ebd82 in main /src/libsixel/converters/img2sixel.c:457:22
#9 0x7f17a51ed82f in __libc_start_main /build/glibc-LK5gWL/glibc-2.23/csu/../csu/libc-start.c:291
#10 0x418d38 in _start (/src/aflbuild/installed/bin/img2sixel+0x418d38)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /src/libsixel/src/tosixel.c:562:38 in sixel_encode_body
==23526==ABORTING
others
from fuzz project pwd-libsixel-img2sixel-03
crash name pwd-libsixel-img2sixel-03-00000076-20191201.pnm
Auto-generated by pyspider at 2019-12-01 23:22:18
please send email to teamseri0us360@gmail.com if you have any questions.
libsixel
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description
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sixel_encode_body@tosixel.c:562-38___SEGV_UNKNOW
description
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bug report
ASAN:DEADLYSIGNAL ================================================================= ==23526==ERROR: AddressSanitizer: SEGV on unknown address 0x7f1651943dc8 (pc 0x7f17a65b9d04 bp 0x7ffecb75fbd0 sp 0x7ffecb75fa00 T0) #0 0x7f17a65b9d03 in sixel_encode_body /src/libsixel/src/tosixel.c:562:38 #1 0x7f17a65b30ce in sixel_encode_dither /src/libsixel/src/tosixel.c:802:14 #2 0x7f17a65b30ce in sixel_encode /src/libsixel/src/tosixel.c:1488 #3 0x7f17a66b31ee in sixel_encoder_output_without_macro /src/libsixel/src/encoder.c:820:14 #4 0x7f17a66b31ee in sixel_encoder_encode_frame /src/libsixel/src/encoder.c:1050 #5 0x7f17a6608883 in load_with_builtin /src/libsixel/src/loader.c:913:14 #6 0x7f17a6608883 in sixel_helper_load_image_file /src/libsixel/src/loader.c:1352 #7 0x7f17a66b05bc in sixel_encoder_encode /src/libsixel/src/encoder.c:1737:14 #8 0x4ebd82 in main /src/libsixel/converters/img2sixel.c:457:22 #9 0x7f17a51ed82f in __libc_start_main /build/glibc-LK5gWL/glibc-2.23/csu/../csu/libc-start.c:291 #10 0x418d38 in _start (/src/aflbuild/installed/bin/img2sixel+0x418d38) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV /src/libsixel/src/tosixel.c:562:38 in sixel_encode_body ==23526==ABORTINGothers