#inputsanitization — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #inputsanitization, aggregated by home.social.
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How a Routine Security Review Turned Into a Full Supply Chain Risk Discovery
This article discusses an XSS (Cross-Site Scripting) vulnerability within an enterprise application, which led to the exposure of its entire supply chain. The root cause was insufficient input sanitization in URL parameters, enabling malicious scripts to be injected through a seemingly innocuous 'Enable JavaScript and cookies' prompt. By crafting payloads that stole session cookies and executed arbitrary client-side code within the context of the vulnerable website, an attacker could impersonate users and potentially gain access to sensitive data. The researcher discovered the flaw during a routine security review and received a reward of $20,000 for reporting it. To remediate, validate and sanitize all user inputs to prevent XSS attacks, ensuring they only contain safe characters. Key lesson: Never trust user-provided input blindly; always validate and sanitize it before rendering on the client side. #BugBounty #Cybersecurity #XSS #InputSanitization #SupplyChainRisk -
How a Routine Security Review Turned Into a Full Supply Chain Risk Discovery
This article discusses an XSS (Cross-Site Scripting) vulnerability within an enterprise application, which led to the exposure of its entire supply chain. The root cause was insufficient input sanitization in URL parameters, enabling malicious scripts to be injected through a seemingly innocuous 'Enable JavaScript and cookies' prompt. By crafting payloads that stole session cookies and executed arbitrary client-side code within the context of the vulnerable website, an attacker could impersonate users and potentially gain access to sensitive data. The researcher discovered the flaw during a routine security review and received a reward of $20,000 for reporting it. To remediate, validate and sanitize all user inputs to prevent XSS attacks, ensuring they only contain safe characters. Key lesson: Never trust user-provided input blindly; always validate and sanitize it before rendering on the client side. #BugBounty #Cybersecurity #XSS #InputSanitization #SupplyChainRisk -
Local File Inclusion in a PHP Reservation System — From Parameter Abuse to Source Code Disclosure
This vulnerability was a Local File Inclusion (LFI) in a PHP reservation system due to insufficient input validation on user-controlled parameters. The application failed to properly sanitize $_GET['page'] requests, allowing attackers to supply arbitrary file paths (e.g., '../config.php') for inclusion within the page content. By crafting payloads that leveraged this flaw, such as 'index.php?page=../../config.php', the researcher could access sensitive configuration details like database credentials and even view source code. The attack vector involved injecting the LFI payload into the 'page' parameter to trigger file inclusion from an unintended location outside of the intended directory structure. This flaw demonstrated poor sanitization of user-controlled parameters, leading to information disclosure and potential access control bypasses. The attacker received $5,000 for reporting the vulnerability. To remediate, validate user inputs carefully before processing them, especially when including files using functions like include() or require(). Key lesson: Always sanitize user-controlled parameters before file inclusion to prevent Local File Inclusion (LFI) attacks. #BugBounty #Cybersecurity #WebSecurity #InputSanitization #LocalFileInclusion -
Local File Inclusion in a PHP Reservation System — From Parameter Abuse to Source Code Disclosure
This vulnerability was a Local File Inclusion (LFI) in a PHP reservation system due to insufficient input validation on user-controlled parameters. The application failed to properly sanitize $_GET['page'] requests, allowing attackers to supply arbitrary file paths (e.g., '../config.php') for inclusion within the page content. By crafting payloads that leveraged this flaw, such as 'index.php?page=../../config.php', the researcher could access sensitive configuration details like database credentials and even view source code. The attack vector involved injecting the LFI payload into the 'page' parameter to trigger file inclusion from an unintended location outside of the intended directory structure. This flaw demonstrated poor sanitization of user-controlled parameters, leading to information disclosure and potential access control bypasses. The attacker received $5,000 for reporting the vulnerability. To remediate, validate user inputs carefully before processing them, especially when including files using functions like include() or require(). Key lesson: Always sanitize user-controlled parameters before file inclusion to prevent Local File Inclusion (LFI) attacks. #BugBounty #Cybersecurity #WebSecurity #InputSanitization #LocalFileInclusion -
Arbitrary Code Execution via Scanner Bypass in `aws-diagram-mcp-server` `exec()` Namespace
This vulnerability involves arbitrary code execution due to a scanner bypass in the `aws-diagram-mcp-server` `exec()` namespace. The application fails to properly filter user-controlled input when constructing command-line arguments, allowing malicious input to execute arbitrary code. The researcher discovered this by injecting special characters (e.g., semi-colon ;) to execute multiple commands separated by semicolons. The vulnerability was caused by the lack of input sanitization in the `exec()` function, which resulted in the execution of user-supplied shell commands. This flaw allows an attacker to execute any command on the system with the same privileges as the application, potentially leading to full system compromise. The researcher received $2,000 for this vulnerability. To prevent similar issues, it is crucial to properly sanitize user inputs and limit the scope of command execution. Key lesson: Always sanitize user inputs to prevent arbitrary code execution. #BugBounty #Cybersecurity #WebSecurity #ArbitraryCodeExecution #InputSanitization