ed0e1e4d44
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libao memory corruption vulnerability
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Author : qflb.wu
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===============
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Introduction:
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=============
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Libao is a cross-platform audio library that allows programs to output audio using a simple API on a wide variety of platforms.
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Affected version:
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=====
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1.2.0
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Vulnerability Description:
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==========================
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the _tokenize_matrix function in audio_out.c in Xiph.Org libao 1.2.0 can cause a denial of service(memory corruption) via a crafted mp3 file.
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I found this bug when I test mpg321 0.3.2 which used the libao library.
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./mpg321 libao_1.2.0_memory_corruption.mp3
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----debug info:----
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Program received signal SIGSEGV, Segmentation fault.
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_int_malloc (av=av@entry=0x7ffff6f7f760 <main_arena>, bytes=bytes@entry=3)
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at malloc.c:3740
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3740malloc.c: No such file or directory.
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(gdb) bt
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#0 _int_malloc (av=av@entry=0x7ffff6f7f760 <main_arena>, bytes=bytes@entry=3)
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at malloc.c:3740
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#1 0x00007ffff6c442cc in __libc_calloc (n=<optimized out>,
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elem_size=<optimized out>) at malloc.c:3219
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#2 0x00007ffff728e189 in _tokenize_matrix () from /usr/local/lib/libao.so.4
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#3 0x00007ffff728e607 in _matrix_to_channelmask ()
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from /usr/local/lib/libao.so.4
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#4 0x00007ffff72906f2 in _open_device () from /usr/local/lib/libao.so.4
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#5 0x000000000040a6aa in open_ao_playdevice (header=header@entry=0x624af8)
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at ao.c:411
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#6 0x0000000000407e50 in output (data=<optimized out>, header=0x624af8,
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pcm=0x627f44) at mad.c:974
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#7 0x00007ffff749a85c in run_sync (decoder=0x7fffffffbc40) at decoder.c:439
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#8 0x00007ffff749ab38 in mad_decoder_run (
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decoder=decoder@entry=0x7fffffffbc40,
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mode=mode@entry=MAD_DECODER_MODE_SYNC) at decoder.c:557
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#9 0x0000000000403d5d in main (argc=<optimized out>, argv=<optimized out>)
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at mpg321.c:1092
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(gdb)
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POC:
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libao_1.2.0_memory_corruption.mp3
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CVE:
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CVE-2017-11548
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/42400.zip |