Source: cna@vuldb.com
A vulnerability was found in flitto express-param up to 0.x. It has been classified as critical. This affects an unknown part of the file lib/fetchParams.js. The manipulation leads to improper handling of extra parameters. It is possible to initiate the attack remotely. Upgrading to version 1.0.0 is able to address this issue. The identifier of the patch is db94f7391ad0a16dcfcba8b9be1af385b25c42db. It is recommended to upgrade the affected component. The identifier VDB-217149 was assigned to this vulnerability.
Critical vulnerability exists in the flitto express-param library, allowing for remote exploitation due to improper handling of extra parameters. Successful exploitation could lead to unspecified impact, potentially including data breaches or system compromise. Immediate patching to version 1.0.0 is crucial to mitigate this risk.
Step 1: Payload Delivery: An attacker crafts a malicious request containing extra parameters that are not properly handled by fetchParams.js.
Step 2: Request Processing: The vulnerable fetchParams.js function receives and processes the crafted request, including the malicious extra parameters.
Step 3: Vulnerability Trigger: Due to the lack of input validation or sanitization, the extra parameters are improperly handled, leading to a vulnerability. This could involve the injection of malicious code or the manipulation of program logic.
Step 4: Exploitation: The vulnerability is exploited, potentially leading to arbitrary code execution, denial of service, or information disclosure, depending on the nature of the flaw and the attacker's payload.
Step 5: Impact: The attacker achieves their objective, which could range from data theft to complete system compromise.
The vulnerability lies within the lib/fetchParams.js file of the flitto express-param library. The root cause is the improper handling of extra parameters passed to a function within this file. This likely involves a lack of input validation or sanitization, allowing an attacker to inject malicious data. The specific flaw could be related to how the library parses or processes user-supplied input, potentially leading to unexpected behavior or control flow manipulation. Without further details, it's difficult to pinpoint the exact vulnerability, but the description suggests a parameter-handling issue that could lead to various outcomes, including arbitrary code execution, denial of service, or information disclosure.
Due to the lack of specific details, it is difficult to attribute this vulnerability to specific APTs or malware. However, any vulnerability classified as 'critical' is likely to be of interest to various threat actors. CISA KEV status: Unknown due to the lack of specific details and widespread exploitation.
Monitor network traffic for unusual requests containing extra, unexpected parameters to endpoints using flitto express-param.
Analyze server logs for error messages or unexpected behavior related to the fetchParams.js file.
Implement intrusion detection systems (IDS) with rules specifically designed to detect exploitation attempts against this vulnerability. These rules should look for unusual parameter values or patterns in HTTP requests.
Perform regular vulnerability scans using tools that can identify vulnerable versions of flitto express-param.
Upgrade flitto express-param to version 1.0.0 or later. This is the primary and most effective remediation step.
Implement robust input validation and sanitization to ensure that all user-supplied parameters are properly checked and filtered before being processed by fetchParams.js.
Review the code in fetchParams.js to identify and fix any potential vulnerabilities related to parameter handling.
Apply the patch identified by the commit hash db94f7391ad0a16dcfcba8b9be1af385b25c42db.
Implement a Web Application Firewall (WAF) to filter malicious requests before they reach the vulnerable application.