CVE-2023-1200 in bbs
Summary
by MITRE • 03/06/2023
A vulnerability was found in ehuacui bbs. It has been declared as problematic. This vulnerability affects unknown code. The manipulation of the argument username leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The identifier of this vulnerability is VDB-222388.
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Analysis
by VulDB Data Team • 05/13/2023
The vulnerability identified as CVE-2023-1200 represents a cross site scripting flaw within the ehuacui bbs platform that demonstrates a critical weakness in input validation and output encoding mechanisms. This vulnerability resides in the username parameter handling functionality where insufficient sanitization allows malicious users to inject arbitrary script code that executes in the context of other users' browsers. The issue stems from the application's failure to properly validate and escape user-supplied input before rendering it in web pages, creating an environment where attacker-controlled content can be interpreted as executable JavaScript code.
The technical exploitation of this vulnerability occurs through remote manipulation of the username argument, which represents a classic XSS attack vector categorized under CWE-79 - Improper Neutralization of Input During Web Page Generation. The vulnerability's remote attack surface means that malicious actors can trigger the exploit without requiring physical access to the system or local network presence, making it particularly dangerous for web applications. This type of vulnerability enables attackers to perform session hijacking, deface web pages, steal sensitive user data, or redirect victims to malicious sites. The rolling release model employed by the affected product complicates remediation efforts as there are no specific version details available to determine which releases contain the fix or are vulnerable, creating uncertainty for administrators trying to assess their risk exposure.
The operational impact of this vulnerability extends beyond simple script execution as it can be leveraged for more sophisticated attacks within the context of the targeted application. Attackers can exploit this vulnerability to steal session cookies, which would allow them to impersonate legitimate users and gain unauthorized access to protected areas of the forum. The disclosed exploit status means that threat actors have already developed working methods to take advantage of this weakness, increasing the probability of successful attacks against vulnerable installations. The lack of version information in the rolling release model creates additional challenges for security teams as they cannot definitively identify vulnerable versions or plan appropriate patching schedules.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and output encoding mechanisms that prevent script code from being executed in the browser context. The recommended approach includes implementing strict input validation that rejects or sanitizes potentially malicious characters in username parameters, combined with proper HTML escaping of all user-generated content before rendering. Organizations should also consider implementing content security policies that limit script execution capabilities and utilize web application firewalls to detect and block suspicious requests. Additionally, regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other application components, as this type of flaw often indicates broader security weaknesses in the application architecture. The vulnerability aligns with ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as attackers can use XSS vulnerabilities to deliver malicious payloads through compromised user accounts or to manipulate forum content to trick users into executing harmful code.