CVE-2001-1084 in JRun
Summary
by MITRE
Cross-site scripting vulnerability in Allaire JRun 3.0 and 2.3.3 allows a malicious webmaster to embed Javascript in a request for a .JSP, .shtml, .jsp10, .jrun, or .thtml file that does not exist, which causes the Javascript to be inserted into an error message.
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Analysis
by VulDB Data Team • 12/15/2024
This cross-site scripting vulnerability in Allaire JRun versions 3.0 and 2.3.3 represents a critical security flaw that enables malicious actors to inject malicious javascript code into web applications. The vulnerability specifically manifests when a webmaster intentionally or unintentionally embeds javascript within requests for non-existent files with extensions such as .jsp, .shtml, .jsp10, .jrun, or .thtml. When the web application attempts to process these requests and generates an error message, the embedded javascript code becomes part of the error response, creating a persistent cross-site scripting vector that can be exploited by attackers.
The technical mechanism of this vulnerability aligns with CWE-79, which describes cross-site scripting flaws where untrusted data is improperly incorporated into web page content without proper sanitization or encoding. The flaw occurs at the application level where input validation and output encoding mechanisms fail to properly handle malformed requests for non-existent resources. When JRun processes these requests, it does not adequately sanitize the user-supplied input before incorporating it into error messages, allowing javascript code to be executed in the context of the victim's browser session.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, deface web applications, steal sensitive user information, or redirect victims to malicious sites. The vulnerability affects the core web application framework functionality where error handling routines do not properly escape or filter user input, creating a persistent threat that can be exploited across multiple user sessions. This type of vulnerability particularly impacts web applications that rely on dynamic content generation and error reporting mechanisms that incorporate user-supplied data without proper security controls.
Organizations running affected JRun versions should immediately implement input validation controls at the application level to sanitize all user-supplied data before processing requests for non-existent resources. The mitigation strategy should include proper output encoding of all dynamic content, implementing Content Security Policy headers, and ensuring that error messages do not contain user-supplied data without appropriate sanitization. From an ATT&CK framework perspective, this vulnerability maps to T1566.001 (Phishing via Service) and T1059.007 (Command and Scripting Interpreter: JavaScript) as attackers can leverage this vector to establish persistent access and execute malicious code within victim browsers. Regular security testing and application scanning should be implemented to identify similar input validation flaws in web applications, with particular attention to error handling routines that process user input without proper sanitization controls.