CVE-2008-0848 in Crafty Syntax Live Help
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in lostsheep.php in Crafty Syntax Live Help (CSLH) before 2.14.16, allows remote attackers to inject arbitrary web script or HTML via unspecified vectors. NOTE: the versions claimed by the original researcher are probably incorrect.
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Analysis
by VulDB Data Team • 11/10/2017
The vulnerability identified as CVE-2008-0848 represents a cross-site scripting flaw within Crafty Syntax Live Help version 2.14.15 and earlier, constituting a critical security weakness that enables remote attackers to execute malicious web scripts or HTML code within the context of affected user sessions. This vulnerability specifically resides in the lostsheep.php component of the CSLH application, which serves as a crucial element for handling lost password functionality and user authentication processes. The flaw manifests when the application fails to properly sanitize or validate user input parameters that are processed within this particular script, creating an avenue for attackers to inject malicious payloads that can be executed by unsuspecting users who interact with the vulnerable system.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output encoding practices within the lostsheep.php script, which processes user-supplied data without sufficient sanitization measures. This weakness allows attackers to craft malicious input strings that, when processed by the vulnerable application, get rendered back to users in a way that executes the injected code rather than being treated as benign text. The unspecified vectors mentioned in the vulnerability description suggest that multiple input points within the script could potentially be exploited, including form fields, URL parameters, or other user-controllable inputs that are not properly escaped or validated before being incorporated into the application's response. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting weaknesses in web applications, where improper validation of input data leads to the execution of malicious scripts in user browsers.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it can enable attackers to perform session hijacking, redirect users to malicious websites, or steal sensitive information from authenticated sessions. When exploited successfully, the XSS flaw allows attackers to execute arbitrary code within the victim's browser context, potentially compromising user accounts, stealing session cookies, or modifying application behavior. The vulnerability affects the integrity and confidentiality of the CSLH application, as it undermines the trust relationship between users and the system by enabling unauthorized code execution. Attackers could leverage this weakness to establish persistent access to user accounts, monitor user activities, or even escalate privileges within the application environment, making this vulnerability particularly dangerous for organizations relying on the live help system for customer support and communication.
Organizations should implement comprehensive mitigations including immediate patching to version 2.14.16 or later, which contains the necessary security fixes for the XSS vulnerability. Input validation and output encoding mechanisms must be strengthened throughout the application, particularly in the lostsheep.php script and related components, to ensure all user-supplied data is properly sanitized before processing or display. The implementation of Content Security Policy headers can provide additional protection against XSS attacks by restricting the sources from which scripts can be loaded and executed. Regular security audits and code reviews should be conducted to identify and remediate similar vulnerabilities in other application components. The ATT&CK framework categorizes this vulnerability under the T1059.007 technique for script injection, highlighting the importance of proper input validation and the need for defensive measures that prevent malicious code execution in web applications. Security monitoring should be enhanced to detect unusual patterns in user input that might indicate attempted XSS exploitation, and regular penetration testing should be performed to validate the effectiveness of implemented security controls.