# Exploit Discovery In this chapter, we’ll dive into how to identify the correct exploit for a vulnerability using resources like SearchSploit, MITRE ATT\&CK, and NIST’s National Vulnerability Database (NVD). This process involves pinpointing vulnerabilities, understanding exploitability, and selecting appropriate tools and methods. We’ll walk through three in-depth case studies that illustrate different scenarios in network, web application, and system exploitation, showing how these frameworks can streamline the process of locating and selecting the right exploit. *** #### Key Frameworks for Exploit Discovery 1. **SearchSploit**: An offline tool included in Exploit-DB that lets you search through available exploits directly from your terminal. Useful for finding pre-written exploits for known vulnerabilities. 2. **MITRE ATT\&CK**: A comprehensive knowledge base that categorizes tactics and techniques used by cyber adversaries, linked to real-world observations. Helps in mapping out stages of an attack and finding corresponding methods and tools. 3. **NIST National Vulnerability Database (NVD)**: Contains standardized data on software vulnerabilities (CVEs). Each entry includes information about the severity, impact, and possible mitigations, making it a valuable resource for identifying risks and finding mitigations. *** #### Case Study 1: Web Application Exploitation – SQL Injection Vulnerability **Scenario** A cybersecurity assessment has identified a web application with an SQL injection vulnerability in the login form. The web app uses a poorly coded SQL query that is susceptible to injection attacks. **Steps to Identify and Use the Exploit** 1. **SearchSploit**: * **Query**: Using `searchsploit "SQL injection" web application` on the terminal yields several potential scripts, payloads, and methods for exploiting SQL injection. * **Exploit Selection**: Narrow down based on the web app’s technology stack (e.g., PHP or ASP). * **Example Exploit**: `SQL Injection Exploit - PHP (Login Bypass).` Download the exploit and review its contents to ensure it aligns with the application environment. 2. **MITRE ATT\&CK**: * **Mapping Technique**: Using the MITRE ATT\&CK framework, SQL Injection falls under the `T1190 - Exploit Public-Facing Application` technique, which is part of the “Initial Access” tactic. * **Further Analysis**: Mapping the technique helps identify related methods attackers may use in conjunction with SQL Injection (e.g., credential dumping after a successful login bypass). 3. **NVD**: * **Vulnerability Lookup**: Check the NVD database for similar SQL injection vulnerabilities (e.g., CVE-2020-12084). This entry might include severity, associated risk, and potential mitigation or remediation suggestions. * **Severity and Relevance**: The CVSS score on NVD helps prioritize if this is a critical vulnerability, which aids in justifying the exploit’s importance. **Execution** Once the vulnerability is verified, a crafted SQL payload (like `admin'--`) can bypass login. Further, tools like SQLmap automate the attack and extract sensitive information from the database once initial access is gained. *** #### Case Study 2: Network Exploitation – SMB Vulnerability **Scenario** During a network audit, an SMB service on a Windows server (version 2003) was identified as vulnerable. A quick scan suggests this service may be susceptible to an exploit for the MS08-067 vulnerability, a critical buffer overflow in Microsoft’s SMB protocol. **Steps to Identify and Use the Exploit** 1. **SearchSploit**: * **Query**: Execute `searchsploit MS08-067` to locate relevant exploits for this known vulnerability. This command reveals multiple options, including Python scripts and Metasploit modules. * **Exploit Selection**: Choose an exploit such as `Microsoft Windows Server Service - Remote Buffer Overflow (MS08-067)`, compatible with Metasploit and non-Metasploit options. * **Verification**: Run a test payload in a controlled environment to confirm exploit functionality. 2. **MITRE ATT\&CK**: * **Mapping Technique**: The MS08-067 exploit maps to the `T1210 - Exploitation of Remote Services` technique, useful in lateral movement within a network. * **Tactical Relevance**: The tactic helps reveal related techniques that may support post-exploitation (e.g., privilege escalation using stolen credentials after initial access). 3. **NVD**: * **Vulnerability Check**: Search for `CVE-2008-4250` in the NVD for details on MS08-067. This vulnerability has a high CVSS score due to its critical impact on unpatched systems, reinforcing its exploit’s necessity. **Execution** Use Metasploit with the `ms08_067_netapi` module to initiate the exploit on the target IP. If successful, it opens a reverse shell, granting remote command execution. Further privilege escalation techniques can be employed to gain system-level access. *** #### Case Study 3: Credential Harvesting and Privilege Escalation on Linux **Scenario** In a penetration test against a Linux-based web server, weak or reused passwords are suspected. After performing network reconnaissance, SSH is open on a non-standard port, indicating it might be accessible with credential-based attacks. **Steps to Identify and Use the Exploit** 1. **SearchSploit**: * **Query**: Run `searchsploit SSH brute-force` to find scripts and tools that perform brute-force or dictionary-based SSH attacks. * **Exploit Selection**: Choose a brute-forcing tool, such as Hydra or Medusa, along with common password lists. * **Auxiliary Tools**: Consider using tools like John the Ripper or Hashcat if credential hashes are captured during the test. 2. **MITRE ATT\&CK**: * **Mapping Technique**: This type of attack maps to `T1110 - Brute Force`, under “Credential Access.” The tool choice aligns with real-world tactics where attackers systematically attempt to gain SSH access through brute-force. * **Linked Techniques**: This approach may also involve `T1078 - Valid Accounts`, emphasizing post-compromise activities once access is gained. 3. **NVD**: * **Vulnerability Reference**: NVD may not have a direct CVE entry for brute-forcing, as this is a general approach rather than a specific flaw. However, searching for default credential vulnerabilities or known weak password lists in services (e.g., `CVE-2020-7460` for SSH with default credentials) can inform the risk level. **Execution** Using Hydra: `hydra -l root -P passwords.txt ssh://:`. If credentials are cracked, a shell can be accessed, followed by privilege escalation attempts (e.g., checking for `sudo` rights or SUID binaries). Tools like `LinPEAS` and `Linux Exploit Suggester` can be run for potential privilege escalation techniques, further mapping out exploitable paths on the server. *** #### Additional Resources * **Exploit-DB**: Searchable database of exploits, includes SearchSploit for terminal-based access. * **MITRE ATT\&CK Navigator**: Interactive tool for mapping out tactics and techniques by stages of an attack. * **National Vulnerability Database (NVD)**: Tracks all known CVEs, their severity scores, and contextual information. Each case demonstrates the synergy between these frameworks, from identifying vulnerabilities to selecting the right exploits and post-exploitation activities. Following this structured approach helps ensure systematic exploitation while considering each vulnerability's context and overall attack chain possibilities. Here’s an extensive listing some common vulnerabilities, corresponding MITRE ATT\&CK techniques, and description. Each vulnerability type is associated with its relevant MITRE ATT\&CK technique ID (when applicable).
VulnerabilityMITRE ATT&CK TechniqueDescription
SQL InjectionT1190 - Exploit Public-Facing ApplicationAn attacker injects malicious SQL queries into input fields to manipulate database queries and access unauthorized data.
Command InjectionT1059 - Command and Scripting InterpreterExploits allow attackers to execute arbitrary commands on a host, often used to gain control or retrieve sensitive data.
Cross-Site Scripting (XSS)T1059.007 - Cross-Site ScriptingMalicious scripts are injected into trusted websites, leading to session hijacking or data theft.
Cross-Site Request Forgery (CSRF)T1056 - Input CaptureExploits user sessions by tricking them into making unwanted actions on a trusted application.
Path TraversalT1104 - Directory TraversalAttackers manipulate URL paths to access files and directories outside the web root.
Local File Inclusion (LFI)T1211 - Exploitation for Privilege EscalationAllows attackers to include files from the local server, potentially exposing sensitive info.
Remote File Inclusion (RFI)T1190 - Exploit Public-Facing ApplicationAttackers remotely include files, often malicious, from a server they control to compromise a host.
Buffer OverflowT1203 - Exploitation for Client ExecutionOverflowing a buffer with excessive data to manipulate the memory, often allowing code execution.
XML External Entity Injection (XXE)T1190 - Exploit Public-Facing ApplicationAttackers exploit XML parsers to access system files or initiate network requests.
Insecure DeserializationT1574.002 - Dylib HijackingExploits unsafe handling of serialized data, leading to remote code execution or data manipulation.
Server-Side Request Forgery (SSRF)T1071.001 - Application Layer ProtocolAn attacker tricks a server into making requests to unauthorized locations on its behalf.
Unrestricted File UploadT1190 - Exploit Public-Facing ApplicationAttackers upload malicious files, which can then be executed on the server.
Improper AuthenticationT1078 - Valid AccountsWeak authentication practices allow unauthorized access to system resources.
Hardcoded CredentialsT1110.001 - Credential DumpingDevelopers leave credentials within code, making them vulnerable to discovery and misuse.
Insecure Direct Object References (IDOR)T1530 - Data from Local SystemExposes data by failing to properly authorize access to internal objects.
Improper Session HandlingT1525 - Implant Container ImageWeak session management allows attackers to hijack or manipulate sessions.
Weak Password PoliciesT1110 - Brute ForceWeak or unenforced password rules make accounts more susceptible to brute-force attacks.
API Key LeakageT1552 - Unsecured CredentialsExposed API keys allow unauthorized access to application functionality or data.
Improper Error HandlingT1047 - Exfiltration Over Unencrypted/Obfuscated ChannelError messages reveal sensitive data or give attackers clues to exploit vulnerabilities.
Race ConditionT1069.001 - Permissions, User, GroupExploits delays between processes to manipulate resource access or obtain privileged information.
JSON Web Token (JWT) FlawsT1556.003 - Network Service ScanningWeak JWT validation or improper handling of token expiration allows privilege escalation.
Command Injection in IoT DevicesT1071 - Application Layer ProtocolCommand injection exploits can compromise IoT devices, leading to unauthorized access or control.
LDAP InjectionT1220 - Compromise Application Access TokenMalformed LDAP queries can reveal sensitive directory information or allow unauthorized access.
Weak TLS/SSL ConfigurationT1573 - Encrypted ChannelMisconfigured SSL/TLS allows attackers to intercept, alter, or decrypt sensitive data in transit.
Improper Access ControlT1078 - Valid AccountsWeak or missing access controls allow unauthorized users to gain elevated permissions.
Plaintext Storage of Sensitive DataT1003 - Credential DumpingStoring sensitive data in plaintext exposes it to unauthorized access and misuse.
Log Forging and InjectionT1059 - Command and Scripting InterpreterManipulating logs to hide malicious activity or create false records, often to evade detection.
DNS HijackingT1596.002 - Active ScanningAttackers alter DNS settings to redirect users to malicious sites or intercept sensitive data.
Shell InjectionT1059 - Command and Scripting InterpreterEnables remote command execution through shell interfaces, compromising system integrity.
EavesdroppingT1071.001 - Application Layer ProtocolIntercepting network communications to capture sensitive information.
Cache PoisoningT1557 - Man in the MiddleManipulates cache entries to serve malicious responses, often redirecting users or delivering malware.
Password SprayingT1110.001 - Password GuessingAttempting commonly used passwords across many accounts to gain access.
Man-in-the-Middle (MitM) AttackT1557 - Man in the MiddleIntercepting and potentially altering communication between two parties without their knowledge.
BlueKeep (RDP Vulnerability)T1210 - Exploitation of Remote ServicesA vulnerability in RDP allowing remote code execution, critical for Windows systems.
Weak HTTP HeadersT1190 - Exploit Public-Facing ApplicationInsecure HTTP headers weaken browser protection against common attacks.
Remote Code Execution (RCE)T1203 - Exploitation for Client ExecutionAllows an attacker to execute arbitrary code remotely, compromising the system.
Default Credentials in IoT DevicesT1078 - Valid AccountsUse of default credentials makes IoT devices susceptible to unauthorized access.
Typo-SquattingT1539 - Steal Application Access TokenRegistering domains with similar names to trick users into accessing malicious sites.
Sensitive Data ExposureT1114.002 - Data EncodingPoor data handling exposes sensitive information to unauthorized parties.
Log InjectionT1070.004 - Event Triggered ExecutionExploits injection flaws in log generation, enabling attackers to obfuscate their tracks.
Ransomware ExploitsT1486 - Data Encrypted for ImpactEncrypts files to demand a ransom for data decryption, causing severe operational disruptions.
Fileless MalwareT1055.013 - Process InjectionMalware that operates in-memory only, evading traditional detection methods.
Memory CorruptionT1068 - Exploitation for Privilege EscalationExploits memory flaws to manipulate application behavior or escalate privileges.
Reverse ShellT1219 - Remote Access SoftwareAllows attackers to execute commands on a remote machine through a shell interface.
Credential ReuseT1078 - Valid AccountsUsing stolen credentials from one service to access another, often leading to data breaches.
Cross-Site WebSocket HijackingT1071.001 - Application Layer ProtocolExploits improper validation in WebSocket connections to gain unauthorized access.
Improper Validation of Integrity ChecksT1589 - Gather Victim Identity InformationFailing to verify data integrity allows attackers to manipulate system behavior.
Integer OverflowT1203 - Exploitation for Client ExecutionExploits integer value overflow to manipulate program execution, often for privilege escalation.
This table covers a wide array of common vulnerabilities with brief descriptions and MITRE ATT\&CK references for context. Let me know if you'd like additional details for any of these vulnerabilities or further examples! --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ghostpatch.gitbook.io/hexdefender/penetration-testing/exploitation-techniques/exploit-discovery.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.