CVE-2023-32624 in TS Webfonts for SAKURA Plugin
Summary
by MITRE • 07/21/2023
Cross-site scripting vulnerability in TS Webfonts for SAKURA 3.1.0 and earlier allows a remote unauthenticated attacker to inject an arbitrary script.
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Analysis
by VulDB Data Team • 08/15/2023
The vulnerability identified as CVE-2023-32624 represents a critical cross-site scripting flaw within the TS Webfonts plugin version 3.1.0 and earlier, specifically affecting the SAKURA web application framework. This security weakness resides in the plugin's handling of user-supplied input within web font rendering processes, creating an avenue for malicious actors to execute arbitrary scripts within the context of affected web applications. The vulnerability manifests when the system fails to properly sanitize or escape user-provided font data before incorporating it into web pages, allowing attackers to inject malicious JavaScript code that executes in the browsers of unsuspecting users.
The technical exploitation of this vulnerability follows a classic XSS attack pattern where an unauthenticated remote attacker can manipulate the web font loading mechanism to inject malicious payloads. The flaw likely occurs during the processing of font metadata or font file parameters that are not adequately validated or escaped before being rendered in web browsers. This vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting flaws, where the system does not properly neutralize user-controllable input before it is used in web output. The attack vector leverages the web font loading process to execute malicious scripts in the context of the victim's browser session, potentially enabling session hijacking, data theft, or further exploitation of the compromised user environment.
The operational impact of this vulnerability extends beyond simple script execution, as it can lead to complete session compromise and unauthorized access to sensitive user data. An attacker could inject scripts that steal cookies, session tokens, or personal information from users interacting with vulnerable web applications. The remote unauthenticated nature of this vulnerability makes it particularly dangerous as it requires no prior access credentials or privileged position within the system. This flaw can be exploited across various user contexts, potentially affecting any individual who interacts with web pages utilizing the vulnerable TS Webfonts plugin, making it a significant threat to user privacy and application security. The vulnerability could also serve as a stepping stone for more sophisticated attacks, as successful XSS exploitation often leads to additional security compromises within the user's browser environment.
Mitigation strategies for CVE-2023-32624 should prioritize immediate plugin updates to versions that address the XSS vulnerability through proper input sanitization and output encoding. System administrators should implement comprehensive content security policies that restrict script execution and prevent unauthorized code injection. The implementation of proper input validation mechanisms and output escaping for all user-supplied font data represents essential defensive measures. Additionally, organizations should consider deploying web application firewalls that can detect and block malicious script injection attempts. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other web components, while user education regarding the risks of visiting untrusted websites remains crucial for overall security posture. The vulnerability's classification under ATT&CK technique T1059.007 for script injection highlights the need for comprehensive defense-in-depth strategies that address multiple attack vectors and reduce the overall attack surface of web applications.