Libde265 v1.0.8 was discovered to contain a heap-buffer-overflow vulnerability via put_qpel_0_0_fallback_16 in fallback-motion.cc. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted video file.
cpe:2.3:a:struktur:libde265:1.0.8:*:*:*:*:*:*:*
E86A03B2-D0E9-4887-AD06-FBA3F3500FC3
OR
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
07B237A9-69A3-4A9C-9DA0-4E06BD37AE73
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
FA6FEEC2-9F11-4643-8827-749718254FED
OR
### Description

Heap-buffer-overflow (/libde265/build/libde265/liblibde265.so+0x146a04) in put_qpel_0_0_fallback_16(short*, long, unsigned short const*, long, int, int, short*, int)

### Version

```shell
$ ./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

```shell
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 poc12
```

### ASAN

```Shell
WARNING: end_of_sub_stream_one_bit not set to 1 when it should be
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: faulty reference picture list
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: faulty reference picture list
WARNING: faulty reference picture list
=================================================================
==31428==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x7f9a622799e0 at pc 0x7f9a60e56a05 bp 0x7ffcce26bfc0 sp 0x7ffcce26bfb0
READ of size 2 at 0x7f9a622799e0 thread T0
    #0 0x7f9a60e56a04 in put_qpel_0_0_fallback_16(short*, long, unsigned short const*, long, int, int, short*, int) (/libde265/build/libde265/liblibde265.so+0x146a04)
    #1 0x7f9a60e8740d in acceleration_functions::put_hevc_qpel(short*, long, void const*, long, int, int, short*, int, int, int) const (/libde265/build/libde265/liblibde265.so+0x17740d)
    #2 0x7f9a60e878b6 in void mc_luma<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+0x1778b6)
    #3 0x7f9a60e79837 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+0x169837)
    #4 0x7f9a60e8690f 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 0x7f9a60ec17e3 in read_prediction_unit(thread_context*, int, int, int, int, int, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b17e3)
    #6 0x7f9a60ec33fe in read_coding_unit(thread_context*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b33fe)
    #7 0x7f9a60ec4250 in read_coding_quadtree(thread_context*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b4250)
    #8 0x7f9a60ec40fe in read_coding_quadtree(thread_context*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b40fe)
    #9 0x7f9a60ebb726 in read_coding_tree_unit(thread_context*) (/libde265/build/libde265/liblibde265.so+0x1ab726)
    #10 0x7f9a60ec49ea in decode_substream(thread_context*, bool, bool) (/libde265/build/libde265/liblibde265.so+0x1b49ea)
    #11 0x7f9a60ec670f in read_slice_segment_data(thread_context*) (/libde265/build/libde265/liblibde265.so+0x1b670f)
    #12 0x7f9a60e256d2 in decoder_context::decode_slice_unit_sequential(image_unit*, slice_unit*) (/libde265/build/libde265/liblibde265.so+0x1156d2)
    #13 0x7f9a60e25ec1 in decoder_context::decode_slice_unit_parallel(image_unit*, slice_unit*) (/libde265/build/libde265/liblibde265.so+0x115ec1)
    #14 0x7f9a60e24c0f in decoder_context::decode_some(bool*) (/libde265/build/libde265/liblibde265.so+0x114c0f)
    #15 0x7f9a60e27ba8 in decoder_context::decode(int*) (/libde265/build/libde265/liblibde265.so+0x117ba8)
    #16 0x7f9a60e0ee95 in de265_decode (/libde265/build/libde265/liblibde265.so+0xfee95)
    #17 0x5637fa84dbc9 in main (/libde265/build/dec265/dec265+0x6bc9)
    #18 0x7f9a60940c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)
    #19 0x5637fa84b9b9 in _start (/libde265/build/dec265/dec265+0x49b9)

0x7f9a622799e0 is located 464 bytes to the right of 131088-byte region [0x7f9a62259800,0x7f9a62279810)
allocated by thread T0 here:
    #0 0x7f9a61337790 in posix_memalign (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdf790)
    #1 0x7f9a60e601cb in ALLOC_ALIGNED(unsigned long, unsigned long) (/libde265/build/libde265/liblibde265.so+0x1501cb)
    #2 0x7f9a60e6092a in de265_image_get_buffer(void*, de265_image_spec*, de265_image*, void*) (/libde265/build/libde265/liblibde265.so+0x15092a)
    #3 0x7f9a60e62d1a 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 0x7f9a60e470cc 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 0x7f9a60e28824 in decoder_context::generate_unavailable_reference_picture(seq_parameter_set const*, int, bool) (/libde265/build/libde265/liblibde265.so+0x118824)
    #6 0x7f9a60e2b7f5 in decoder_context::process_reference_picture_set(slice_segment_header*) (/libde265/build/libde265/liblibde265.so+0x11b7f5)
    #7 0x7f9a60e2ed70 in decoder_context::process_slice_segment_header(slice_segment_header*, de265_error*, long, nal_header*, void*) (/libde265/build/libde265/liblibde265.so+0x11ed70)
    #8 0x7f9a60e24246 in decoder_context::read_slice_NAL(bitreader&, NAL_unit*, nal_header&) (/libde265/build/libde265/liblibde265.so+0x114246)
    #9 0x7f9a60e2743e in decoder_context::decode_NAL(NAL_unit*) (/libde265/build/libde265/liblibde265.so+0x11743e)
    #10 0x7f9a60e27ab3 in decoder_context::decode(int*) (/libde265/build/libde265/liblibde265.so+0x117ab3)
    #11 0x7f9a60e0ee95 in de265_decode (/libde265/build/libde265/liblibde265.so+0xfee95)
    #12 0x5637fa84dbc9 in main (/libde265/build/dec265/dec265+0x6bc9)
    #13 0x7f9a60940c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/libde265/build/libde265/liblibde265.so+0x146a04) in put_qpel_0_0_fallback_16(short*, long, unsigned short const*, long, int, int, short*, int)
Shadow bytes around the buggy address:
  0x0ff3cc4472e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ff3cc4472f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ff3cc447300: 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447310: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447320: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0ff3cc447330: fa fa fa fa fa fa fa fa fa fa fa fa[fa]fa fa fa
  0x0ff3cc447340: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447350: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447360: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447370: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447380: 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
==31428==ABORTING
```

### POC

https://github.com/FDU-Sec/poc/blob/main/libde265/poc12

### Environment

```shell
Ubuntu 18.04.5 LTS
Clang 10.0.1
gcc 7.5.0
```

### Credit

Peng Deng ([Fudan University](https://secsys.fudan.edu.cn))
Heap-buffer-overflow in fallback-motion.cc: in put_qpel_0_0_fallback_16
This is a GitHub Issue
repo:libde265
owner:strukturag
Title : Heap-buffer-overflow in fallback-motion.cc: in put_qpel_0_0_fallback_16
Issue date:

--- start body ---
### Description

Heap-buffer-overflow (/libde265/build/libde265/liblibde265.so+0x146a04) in put_qpel_0_0_fallback_16(short*, long, unsigned short const*, long, int, int, short*, int)

### Version

```shell
$ ./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

```shell
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 poc12
```

### ASAN

```Shell
WARNING: end_of_sub_stream_one_bit not set to 1 when it should be
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: faulty reference picture list
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: non-existing PPS referenced
WARNING: faulty reference picture list
WARNING: faulty reference picture list
=================================================================
==31428==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x7f9a622799e0 at pc 0x7f9a60e56a05 bp 0x7ffcce26bfc0 sp 0x7ffcce26bfb0
READ of size 2 at 0x7f9a622799e0 thread T0
    #0 0x7f9a60e56a04 in put_qpel_0_0_fallback_16(short*, long, unsigned short const*, long, int, int, short*, int) (/libde265/build/libde265/liblibde265.so+0x146a04)
    #1 0x7f9a60e8740d in acceleration_functions::put_hevc_qpel(short*, long, void const*, long, int, int, short*, int, int, int) const (/libde265/build/libde265/liblibde265.so+0x17740d)
    #2 0x7f9a60e878b6 in void mc_luma<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+0x1778b6)
    #3 0x7f9a60e79837 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+0x169837)
    #4 0x7f9a60e8690f 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 0x7f9a60ec17e3 in read_prediction_unit(thread_context*, int, int, int, int, int, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b17e3)
    #6 0x7f9a60ec33fe in read_coding_unit(thread_context*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b33fe)
    #7 0x7f9a60ec4250 in read_coding_quadtree(thread_context*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b4250)
    #8 0x7f9a60ec40fe in read_coding_quadtree(thread_context*, int, int, int, int) (/libde265/build/libde265/liblibde265.so+0x1b40fe)
    #9 0x7f9a60ebb726 in read_coding_tree_unit(thread_context*) (/libde265/build/libde265/liblibde265.so+0x1ab726)
    #10 0x7f9a60ec49ea in decode_substream(thread_context*, bool, bool) (/libde265/build/libde265/liblibde265.so+0x1b49ea)
    #11 0x7f9a60ec670f in read_slice_segment_data(thread_context*) (/libde265/build/libde265/liblibde265.so+0x1b670f)
    #12 0x7f9a60e256d2 in decoder_context::decode_slice_unit_sequential(image_unit*, slice_unit*) (/libde265/build/libde265/liblibde265.so+0x1156d2)
    #13 0x7f9a60e25ec1 in decoder_context::decode_slice_unit_parallel(image_unit*, slice_unit*) (/libde265/build/libde265/liblibde265.so+0x115ec1)
    #14 0x7f9a60e24c0f in decoder_context::decode_some(bool*) (/libde265/build/libde265/liblibde265.so+0x114c0f)
    #15 0x7f9a60e27ba8 in decoder_context::decode(int*) (/libde265/build/libde265/liblibde265.so+0x117ba8)
    #16 0x7f9a60e0ee95 in de265_decode (/libde265/build/libde265/liblibde265.so+0xfee95)
    #17 0x5637fa84dbc9 in main (/libde265/build/dec265/dec265+0x6bc9)
    #18 0x7f9a60940c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)
    #19 0x5637fa84b9b9 in _start (/libde265/build/dec265/dec265+0x49b9)

0x7f9a622799e0 is located 464 bytes to the right of 131088-byte region [0x7f9a62259800,0x7f9a62279810)
allocated by thread T0 here:
    #0 0x7f9a61337790 in posix_memalign (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdf790)
    #1 0x7f9a60e601cb in ALLOC_ALIGNED(unsigned long, unsigned long) (/libde265/build/libde265/liblibde265.so+0x1501cb)
    #2 0x7f9a60e6092a in de265_image_get_buffer(void*, de265_image_spec*, de265_image*, void*) (/libde265/build/libde265/liblibde265.so+0x15092a)
    #3 0x7f9a60e62d1a 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 0x7f9a60e470cc 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 0x7f9a60e28824 in decoder_context::generate_unavailable_reference_picture(seq_parameter_set const*, int, bool) (/libde265/build/libde265/liblibde265.so+0x118824)
    #6 0x7f9a60e2b7f5 in decoder_context::process_reference_picture_set(slice_segment_header*) (/libde265/build/libde265/liblibde265.so+0x11b7f5)
    #7 0x7f9a60e2ed70 in decoder_context::process_slice_segment_header(slice_segment_header*, de265_error*, long, nal_header*, void*) (/libde265/build/libde265/liblibde265.so+0x11ed70)
    #8 0x7f9a60e24246 in decoder_context::read_slice_NAL(bitreader&, NAL_unit*, nal_header&) (/libde265/build/libde265/liblibde265.so+0x114246)
    #9 0x7f9a60e2743e in decoder_context::decode_NAL(NAL_unit*) (/libde265/build/libde265/liblibde265.so+0x11743e)
    #10 0x7f9a60e27ab3 in decoder_context::decode(int*) (/libde265/build/libde265/liblibde265.so+0x117ab3)
    #11 0x7f9a60e0ee95 in de265_decode (/libde265/build/libde265/liblibde265.so+0xfee95)
    #12 0x5637fa84dbc9 in main (/libde265/build/dec265/dec265+0x6bc9)
    #13 0x7f9a60940c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/libde265/build/libde265/liblibde265.so+0x146a04) in put_qpel_0_0_fallback_16(short*, long, unsigned short const*, long, int, int, short*, int)
Shadow bytes around the buggy address:
  0x0ff3cc4472e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ff3cc4472f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0ff3cc447300: 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447310: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447320: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0ff3cc447330: fa fa fa fa fa fa fa fa fa fa fa fa[fa]fa fa fa
  0x0ff3cc447340: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447350: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447360: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447370: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0ff3cc447380: 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
==31428==ABORTING
```

### POC

https://github.com/FDU-Sec/poc/blob/main/libde265/poc12

### Environment

```shell
Ubuntu 18.04.5 LTS
Clang 10.0.1
gcc 7.5.0
```

### Credit

Peng Deng ([Fudan University](https://secsys.fudan.edu.cn))
--- end body ---

comments :
--- start comments ---

--- end comments ---