CVE-2017-20167 in Minichan
Summary
by MITRE • 01/14/2023
A vulnerability, which was classified as problematic, was found in Minichan. This affects an unknown part of the file reports.php. The manipulation of the argument headline leads to cross site scripting. It is possible to initiate the attack remotely. The name of the patch is fc0e732e58630cba318d6bf49d1388a7aa9d390e. It is recommended to apply a patch to fix this issue. The identifier VDB-217785 was assigned to this vulnerability.
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Analysis
by VulDB Data Team • 01/31/2023
CVE-2017-20167 represents a cross site scripting vulnerability discovered in the Minichan bulletin board system, specifically within the reports.php file. This vulnerability falls under the CWE-79 category of Cross Site Scripting, which is a critical web application security flaw that allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability is triggered when the headline argument is manipulated, enabling attackers to execute arbitrary JavaScript code in the context of the victim's browser session. The attack vector is remotely exploitable, meaning that malicious actors can initiate the vulnerability without requiring physical access to the target system or direct user interaction beyond visiting a maliciously crafted URL.
The technical implementation of this vulnerability demonstrates how insufficient input validation and output encoding can create dangerous attack surfaces in web applications. When user-supplied data from the headline parameter is directly incorporated into the web page response without proper sanitization, it creates an opening for attackers to inject malicious payloads. This type of vulnerability is particularly dangerous because it can be leveraged to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious sites, or even deface the affected web application. The vulnerability's remote exploitability means that attackers can target users from anywhere on the internet, making it a significant threat to any organization running affected versions of Minichan.
The operational impact of CVE-2017-20167 extends beyond simple data theft or defacement, as it can serve as a stepping stone for more sophisticated attacks within a network environment. Once an attacker successfully exploits this vulnerability, they can potentially escalate privileges, access sensitive user data, or use the compromised system as a pivot point for attacking other systems within the same network. The vulnerability's classification as problematic indicates that it poses a substantial risk to web application security and requires immediate remediation. Organizations using Minichan should prioritize patching this vulnerability as it represents a clear and present danger to their security posture, particularly in environments where user-generated content is processed and displayed without proper security controls.
The recommended mitigation strategy involves applying the patch identified by the commit hash fc0e732e58630cba318d6bf49d1388a7aa9d390e, which would address the input validation issues in the reports.php file. This patch should be applied immediately to all affected systems, and organizations should conduct thorough testing to ensure that the patch does not introduce any regressions in functionality. Additionally, implementing proper input validation and output encoding mechanisms throughout the application can help prevent similar vulnerabilities from occurring in the future. Organizations should also consider implementing web application firewalls and content security policies as additional layers of defense. The vulnerability's assignment of identifier VDB-217785 indicates that it has been catalogued in vulnerability databases, making it easier for security professionals to identify and remediate this specific threat. Regular security assessments and code reviews should be conducted to identify and remediate similar input validation issues that could potentially lead to other forms of injection attacks such as SQL injection or command injection.