Gzip Memory Bomb Denial Of Service - Metasploit
This page contains detailed information about how to use the auxiliary/dos/http/gzip_bomb_dos metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Gzip Memory Bomb Denial Of Service
Module: auxiliary/dos/http/gzip_bomb_dos
Source code: modules/auxiliary/dos/http/gzip_bomb_dos.rb
Disclosure date: 2004-01-01
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): -
List of CVEs: -
This module generates and hosts a 10MB single-round gzip file that decompresses to 10GB. Many applications will not implement a length limit check and will eat up all memory and eventually die. This can also be used to kill systems that download/parse content from a user-provided URL (image-processing servers, AV, websites that accept zipped POST data, etc). A FILEPATH datastore option can also be provided to save the .gz bomb locally. Some clients (Firefox) will allow for multiple rounds of gzip. Most gzip utils will correctly deflate multiple rounds of gzip on a file. Setting ROUNDS=3 and SIZE=10240 (default value) will generate a 300 byte gzipped file that expands to 10GB.
Module Ranking and Traits
Module Ranking:
- normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.
Basic Usage
msf > use auxiliary/dos/http/gzip_bomb_dos
msf auxiliary(gzip_bomb_dos) > exploit
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Msfconsole Usage
Here is how the dos/http/gzip_bomb_dos auxiliary module looks in the msfconsole:
msf6 > use auxiliary/dos/http/gzip_bomb_dos
msf6 auxiliary(dos/http/gzip_bomb_dos) > show info
Name: Gzip Memory Bomb Denial Of Service
Module: auxiliary/dos/http/gzip_bomb_dos
License: Metasploit Framework License (BSD)
Rank: Normal
Disclosed: 2004-01-01
Provided by:
info <[email protected]>
joev <[email protected]>
Available actions:
Name Description
---- -----------
WebServer Host file via web server
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
CONTENT_TYPE text/html no Content-Type header to serve in the response
ROUNDS 1 yes Rounds of gzip compression. Some applications (FF) support > 1.
SIZE 10240 yes Size of uncompressed data in megabytes (10GB default).
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSL false no Negotiate SSL for incoming connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no Path of URI on server to the gzip bomb (default is random)
Description:
This module generates and hosts a 10MB single-round gzip file that
decompresses to 10GB. Many applications will not implement a length
limit check and will eat up all memory and eventually die. This can
also be used to kill systems that download/parse content from a
user-provided URL (image-processing servers, AV, websites that
accept zipped POST data, etc). A FILEPATH datastore option can also
be provided to save the .gz bomb locally. Some clients (Firefox)
will allow for multiple rounds of gzip. Most gzip utils will
correctly deflate multiple rounds of gzip on a file. Setting
ROUNDS=3 and SIZE=10240 (default value) will generate a 300 byte
gzipped file that expands to 10GB.
References:
http://www.aerasec.de/security/advisories/decompression-bomb-vulnerability.html
Module Options
This is a complete list of options available in the dos/http/gzip_bomb_dos auxiliary module:
msf6 auxiliary(dos/http/gzip_bomb_dos) > show options
Module options (auxiliary/dos/http/gzip_bomb_dos):
Name Current Setting Required Description
---- --------------- -------- -----------
CONTENT_TYPE text/html no Content-Type header to serve in the response
ROUNDS 1 yes Rounds of gzip compression. Some applications (FF) support > 1.
SIZE 10240 yes Size of uncompressed data in megabytes (10GB default).
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSL false no Negotiate SSL for incoming connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no Path of URI on server to the gzip bomb (default is random)
Auxiliary action:
Name Description
---- -----------
WebServer Host file via web server
Advanced Options
Here is a complete list of advanced options supported by the dos/http/gzip_bomb_dos auxiliary module:
msf6 auxiliary(dos/http/gzip_bomb_dos) > show advanced
Module advanced options (auxiliary/dos/http/gzip_bomb_dos):
Name Current Setting Required Description
---- --------------- -------- -----------
ListenerComm no The specific communication channel to use for this service
SSLCipher no String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
SSLCompression false no Enable SSL/TLS-level compression
SendRobots false no Return a robots.txt file if asked for one
URIHOST no Host to use in URI (useful for tunnels)
URIPORT no Port to use in URI (useful for tunnels)
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Auxiliary Actions
This is a list of all auxiliary actions that the dos/http/gzip_bomb_dos module can do:
msf6 auxiliary(dos/http/gzip_bomb_dos) > show actions
Auxiliary actions:
Name Description
---- -----------
WebServer Host file via web server
Evasion Options
Here is the full list of possible evasion options supported by the dos/http/gzip_bomb_dos auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 auxiliary(dos/http/gzip_bomb_dos) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
HTML::base64 none no Enable HTML obfuscation via an embeded base64 html object (IE not supported) (Accepted: none, plain, single_pad, double_pad, random_space_injection)
HTML::javascript::escape 0 no Enable HTML obfuscation via HTML escaping (number of iterations)
HTML::unicode none no Enable HTTP obfuscation via unicode (Accepted: none, utf-16le, utf-16be, utf-16be-marker, utf-32le, utf-32be)
HTTP::chunked false no Enable chunking of HTTP responses via "Transfer-Encoding: chunked"
HTTP::compression none no Enable compression of HTTP responses via content encoding (Accepted: none, gzip, deflate)
HTTP::header_folding false no Enable folding of HTTP headers
HTTP::junk_headers false no Enable insertion of random junk HTTP headers
HTTP::no_cache false no Disallow the browser to cache HTTP content
HTTP::server_name Apache yes Configures the Server header of all outgoing replies
TCP::max_send_size 0 no Maximum tcp segment size. (0 = disable)
TCP::send_delay 0 no Delays inserted before every send. (0 = disable)
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Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #13443 Merged Pull Request: Add descriptions to auxiliary modules Actions
- #8338 Merged Pull Request: Fix msf/core and self.class msftidy warnings
- #6655 Merged Pull Request: use MetasploitModule as a class name
- #6648 Merged Pull Request: Change metasploit class names
- #2647 Merged Pull Request: Add http gzip decompression dos aux module
References
See Also
Check also the following modules related to this module:
- auxiliary/dos/http/3com_superstack_switch
- auxiliary/dos/http/apache_commons_fileupload_dos
- auxiliary/dos/http/apache_mod_isapi
- auxiliary/dos/http/apache_range_dos
- auxiliary/dos/http/apache_tomcat_transfer_encoding
- auxiliary/dos/http/brother_debut_dos
- auxiliary/dos/http/cable_haunt_websocket_dos
- auxiliary/dos/http/canon_wireless_printer
- auxiliary/dos/http/dell_openmanage_post
- auxiliary/dos/http/f5_bigip_apm_max_sessions
- auxiliary/dos/http/flexense_http_server_dos
- auxiliary/dos/http/hashcollision_dos
- auxiliary/dos/http/ibm_lotus_notes
- auxiliary/dos/http/ibm_lotus_notes2
- auxiliary/dos/http/marked_redos
- auxiliary/dos/http/metasploit_httphandler_dos
- auxiliary/dos/http/monkey_headers
- auxiliary/dos/http/ms15_034_ulonglongadd
- auxiliary/dos/http/nodejs_pipelining
- auxiliary/dos/http/novell_file_reporter_heap_bof
- auxiliary/dos/http/rails_action_view
- auxiliary/dos/http/rails_json_float_dos
- auxiliary/dos/http/slowloris
- auxiliary/dos/http/sonicwall_ssl_format
- auxiliary/dos/http/squid_range_dos
- auxiliary/dos/http/tautulli_shutdown_exec
- auxiliary/dos/http/ua_parser_js_redos
- auxiliary/dos/http/webkitplus
- auxiliary/dos/http/webrick_regex
- auxiliary/dos/http/wordpress_directory_traversal_dos
- auxiliary/dos/http/wordpress_long_password_dos
- auxiliary/dos/http/wordpress_xmlrpc_dos
- auxiliary/dos/http/ws_dos
- exploit/linux/http/pulse_secure_gzip_rce
- exploit/windows/fileformat/tugzip
Authors
- info[at]aerasec.de
- joev
Version
This page has been produced using Metasploit Framework version 6.1.24-dev. For more modules, visit the Metasploit Module Library.
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