Headline
CVE-2022-29978: FPE in sixel_encoder_do_resize, encoder.c:633 · Issue #166 · saitoha/libsixel
There is a floating point exception error in sixel_encoder_do_resize, encoder.c:633 in libsixel img2sixel 1.8.6. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted JPEG file.
Description
There is a floating point exception error in sixel_encoder_do_resize, encoder.c:633 in img2sixel 1.8.6. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted JPEG file.
Version
img2sixel 1.8.6, commit id 6a5be8b (Tue Jan 14 02:27:00 2020 +0900)
Reproduction
# img2sixel -w 128 poc /tmp/foo
ASAN:DEADLYSIGNAL
=================================================================
==1596536==ERROR: AddressSanitizer: FPE on unknown address 0x55718c759aa0 (pc 0x55718c759aa0 bp 0x7fff1eb09d20 sp 0x7fff1eb09cf0 T0)
#0 0x55718c759a9f in sixel_encoder_do_resize /root/programs/libsixel/src/encoder.c:633
#1 0x55718c75b5e5 in sixel_encoder_encode_frame /root/programs/libsixel/src/encoder.c:968
#2 0x55718c760d75 in load_image_callback /root/programs/libsixel/src/encoder.c:1679
#3 0x55718c7c883d in load_gif /root/programs/libsixel/src/fromgif.c:671
#4 0x55718c7c0d74 in load_with_builtin /root/programs/libsixel/src/loader.c:908
#5 0x55718c7c19cb in sixel_helper_load_image_file /root/programs/libsixel/src/loader.c:1418
#6 0x55718c7612e7 in sixel_encoder_encode /root/programs/libsixel/src/encoder.c:1743
#7 0x55718c7549ee in main /root/programs/libsixel/converters/img2sixel.c:457
#8 0x7f382df64c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)
#9 0x55718c752109 in _start (/root/programs/libsixel/build_asan/bin/img2sixel+0x5e109)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: FPE /root/programs/libsixel/src/encoder.c:633 in sixel_encoder_do_resize
==1596536==ABORTING
poc.zip
Platform
# uname -a
Linux 4a409ce47130 5.4.0-70-generic #78~18.04.1-Ubuntu SMP Sat Mar 20 14:10:07 UTC 2021 x86_64 x86_64 x86_64 GNU/LinuxRelated news
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