Heartbleed

Description

The Heartbleed Bug is a serious vulnerability in the popular OpenSSL cryptographic software library. This weakness allows stealing the information protected, under normal conditions, by the SSL/TLS encryption used to secure the Internet. SSL/TLS provides communication security and privacy over the Internet for applications such as web, email, instant messaging (IM) and some virtual private networks (VPNs).

The Heartbleed bug allows anyone on the Internet to read the memory of the systems protected by the vulnerable versions of the OpenSSL software. This compromises the secret keys used to identify the service providers and to encrypt the traffic, the names and passwords of the users and the actual content. This allows attackers to eavesdrop on communications, steal data directly from the services and users and to impersonate services and users.

Heartbleed is a security bug in the open-source OpenSSL cryptography library, which is widely used to implement the Internet’s Transport Layer Security (TLS) protocol. This vulnerability, classified as a buffer over-read, results from a missing bounds check in the handling of the Transport Layer Security (TLS) heartbeat extension, the heartbeat being behind the bug’s name.

Usage

Syntax

 heartbleed.py server [options]

Options

  -h, --help            show this help message and exit
  -p PORT, --port=PORT  TCP port to test (default: 443)
  -n NUM, --num=NUM     Number of times to connect/loop (default: 1)
  -t TLS, --tls=TLS     Specify TLS version: 0 = 1.0, 1 = 1.1, 2 = 1.2
                        (default: 1)
  -s, --starttls        Issue STARTTLS command for SMTP/POP/IMAP/FTP/etc...
  -f FILEIN, --filein=FILEIN
                        Specify input file, line delimited, IPs or hostnames
                        or IP:port or hostname:port
  -v, --verbose         Enable verbose output

Example


cyborg@cyborg:~$ heartbleed 192.168.1.40/local.vuln

##################################################################
Connecting to: 192.168.1.40/local.vuln:443 with TLSv1.1
Sending Client Hello..
Sending heartbeat request..
Warning: 192.168.1.40/local.vuln:443 returned more then data it should - server is vulnerable !
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