Headline
CVE-2022-43252: Heap-buffer-overflow in fallback-motion.cc in put_epel_16_fallback · Issue #347 · strukturag/libde265
Libde265 v1.0.8 was discovered to contain a heap-buffer-overflow vulnerability via put_epel_16_fallback in fallback-motion.cc. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted video file.
Description
Heap-buffer-overflow (/libde265/build/libde265/liblibde265.so+0x1465fb) in put_epel_16_fallback(short*, long, unsigned short const*, long, int, int, int, int, short*, int)
Version
$ ./dec265 -h dec265 v1.0.8
usage: dec265 [options] videofile.bin The video file must be a raw bitstream, or a stream with NAL units (option -n).
options: -q, --quiet do not show decoded image -t, --threads N set number of worker threads (0 - no threading) -c, --check-hash perform hash check -n, --nal input is a stream with 4-byte length prefixed NAL units -f, --frames N set number of frames to process -o, --output write YUV reconstruction -d, --dump dump headers -0, --noaccel do not use any accelerated code (SSE) -v, --verbose increase verbosity level (up to 3 times) -L, --no-logging disable logging -B, --write-bytestream FILENAME write raw bytestream (from NAL input) -m, --measure YUV compute PSNRs relative to reference YUV -T, --highest-TID select highest temporal sublayer to decode –disable-deblocking disable deblocking filter –disable-sao disable sample-adaptive offset filter -h, --help show help
Replay
git clone https://github.com/strukturag/libde265.git cd libde265 mkdir build cd build cmake …/ -DCMAKE_CXX_FLAGS="-fsanitize=address" make -j$(nproc) ./dec265/dec265 poc13
ASAN
WARNING: end_of_sub_stream_one_bit not set to 1 when it should be WARNING: end_of_sub_stream_one_bit not set to 1 when it should be ================================================================= ==64370==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62b00001b510 at pc 0x7f47d023f5fc bp 0x7ffd4845c300 sp 0x7ffd4845c2f0 READ of size 2 at 0x62b00001b510 thread T0 #0 0x7f47d023f5fb in put_epel_16_fallback(short*, long, unsigned short const*, long, int, int, int, int, short*, int) (/libde265/build/libde265/liblibde265.so+0x1465fb) #1 0x7f47d026ffe8 in acceleration_functions::put_hevc_epel(short*, long, void const*, long, int, int, int, int, short*, int) const (/libde265/build/libde265/liblibde265.so+0x176fe8) #2 0x7f47d0271d75 in void mc_chroma<unsigned short>(base_context const*, seq_parameter_set const*, int, int, int, int, short*, int, unsigned short const*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x178d75) #3 0x7f47d0262b2d in generate_inter_prediction_samples(base_context*, slice_segment_header const*, de265_image*, int, int, int, int, int, int, int, PBMotion const*) (/libde265/build/libde265/liblibde265.so+0x169b2d) #4 0x7f47d026f90f in decode_prediction_unit(base_context*, slice_segment_header const*, de265_image*, PBMotionCoding const&, int, int, int, int, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x17690f) #5 0x7f47d02aa7e3 in read_prediction_unit(thread_context*, int, int, int, int, int, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b17e3) #6 0x7f47d02ac264 in read_coding_unit(thread_context*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b3264) #7 0x7f47d02ad250 in read_coding_quadtree(thread_context*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b4250) #8 0x7f47d02a4726 in read_coding_tree_unit(thread_context*) (/libde265/build/libde265/liblibde265.so+0x1ab726) #9 0x7f47d02ad9ea in decode_substream(thread_context*, bool, bool) (/libde265/build/libde265/liblibde265.so+0x1b49ea) #10 0x7f47d02af70f in read_slice_segment_data(thread_context*) (/libde265/build/libde265/liblibde265.so+0x1b670f) #11 0x7f47d020e6d2 in decoder_context::decode_slice_unit_sequential(image_unit*, slice_unit*) (/libde265/build/libde265/liblibde265.so+0x1156d2) #12 0x7f47d020eec1 in decoder_context::decode_slice_unit_parallel(image_unit*, slice_unit*) (/libde265/build/libde265/liblibde265.so+0x115ec1) #13 0x7f47d020dc0f in decoder_context::decode_some(bool*) (/libde265/build/libde265/liblibde265.so+0x114c0f) #14 0x7f47d020d93d in decoder_context::read_slice_NAL(bitreader&, NAL_unit*, nal_header&) (/libde265/build/libde265/liblibde265.so+0x11493d) #15 0x7f47d021043e in decoder_context::decode_NAL(NAL_unit*) (/libde265/build/libde265/liblibde265.so+0x11743e) #16 0x7f47d0210ab3 in decoder_context::decode(int*) (/libde265/build/libde265/liblibde265.so+0x117ab3) #17 0x7f47d01f7e95 in de265_decode (/libde265/build/libde265/liblibde265.so+0xfee95) #18 0x555f566e3bc9 in main (/libde265/build/dec265/dec265+0x6bc9) #19 0x7f47cfd29c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86) #20 0x555f566e19b9 in _start (/libde265/build/dec265/dec265+0x49b9)
0x62b00001b510 is located 0 bytes to the right of 25360-byte region [0x62b000015200,0x62b00001b510) allocated by thread T0 here: #0 0x7f47d0720790 in posix_memalign (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdf790) #1 0x7f47d02491cb in ALLOC_ALIGNED(unsigned long, unsigned long) (/libde265/build/libde265/liblibde265.so+0x1501cb) #2 0x7f47d024999d in de265_image_get_buffer(void*, de265_image_spec*, de265_image*, void*) (/libde265/build/libde265/liblibde265.so+0x15099d) #3 0x7f47d024bd1a in de265_image::alloc_image(int, int, de265_chroma, std::shared_ptr<seq_parameter_set const>, bool, decoder_context*, long, void*, bool) (/libde265/build/libde265/liblibde265.so+0x152d1a) #4 0x7f47d02300cc in decoded_picture_buffer::new_image(std::shared_ptr<seq_parameter_set const>, decoder_context*, long, void*, bool) (/libde265/build/libde265/liblibde265.so+0x1370cc) #5 0x7f47d02173ff in decoder_context::process_slice_segment_header(slice_segment_header*, de265_error*, long, nal_header*, void*) (/libde265/build/libde265/liblibde265.so+0x11e3ff) #6 0x7f47d020d246 in decoder_context::read_slice_NAL(bitreader&, NAL_unit*, nal_header&) (/libde265/build/libde265/liblibde265.so+0x114246) #7 0x7f47d021043e in decoder_context::decode_NAL(NAL_unit*) (/libde265/build/libde265/liblibde265.so+0x11743e) #8 0x7f47d0210ab3 in decoder_context::decode(int*) (/libde265/build/libde265/liblibde265.so+0x117ab3) #9 0x7f47d01f7e95 in de265_decode (/libde265/build/libde265/liblibde265.so+0xfee95) #10 0x555f566e3bc9 in main (/libde265/build/dec265/dec265+0x6bc9) #11 0x7f47cfd29c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)
SUMMARY: AddressSanitizer: heap-buffer-overflow (/libde265/build/libde265/liblibde265.so+0x1465fb) in put_epel_16_fallback(short*, long, unsigned short const*, long, int, int, int, int, short*, int) Shadow bytes around the buggy address: 0x0c567fffb650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c567fffb660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c567fffb670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c567fffb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c567fffb690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c567fffb6a0: 00 00[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c567fffb6b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c567fffb6c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c567fffb6d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c567fffb6e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c567fffb6f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==64370==ABORTING
POC
https://github.com/FDU-Sec/poc/blob/main/libde265/poc13
Environment
Ubuntu 18.04.5 LTS Clang 10.0.1 gcc 7.5.0
Credit
Peng Deng (Fudan University)
Related news
Gentoo Linux Security Advisory 202408-20 - Multiple vulnerabilities have been discovered in libde265, the worst of which could lead to arbitrary code execution. Versions greater than or equal to 1.0.11 are affected.
Ubuntu Security Notice 6627-1 - It was discovered that libde265 could be made to read out of bounds. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service. It was discovered that libde265 did not properly manage memory. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 22.04 LTS.
Debian Linux Security Advisory 5346-1 - Multiple security issues were discovered in libde265, an implementation of the H.265 video codec which may result in denial of service and potentially the execution of arbitrary code if a malformed media file is processed.