ASP-Nuke Open Redirect Scanner

ASP-Nuke is a content management system used by web developers and businesses to create dynamic websites and manage online content efficiently. It is used in environments where rapid development and deployment of web-based solutions are needed. The software allows users to easily update and manage content without needing deep technical knowledge. Web administrators use ASP-Nuke in small to medium-sized enterprises to ensure their web presence is up-to-date. ASP-Nuke is popular for its modular architecture, making it flexible for different types of web applications. The platform is implemented on Windows servers with ASP support to leverage its features effectively.

An open redirect vulnerability in a web application like ASP-Nuke allows an attacker to redirect users to a malicious site without their consent. It typically occurs when a parameter in the URL is not validated and is used to redirect the user to arbitrary sites. This vulnerability can lead to phishing attacks where unsuspecting users are led to believe they are visiting trustworthy sites. Open redirects undermine user trust in the original site and can potentially expose user credentials if combined with a phishing attack. Attackers exploit this vulnerability to manipulate and deceive users with ease. The consequences not only affect user privacy but also damage the reputation of the affected site.

The technical details of the open redirect vulnerability in ASP-Nuke involve the misuse of a URL parameter in the "gotoURL.asp" endpoint, specifically the 'url' parameter. By modifying this parameter, an attacker can direct the user to an external and potentially harmful site. The vulnerability is triggered when the application fails to sanitize input, allowing the attacker to specify any URL. The matcher in the template checks for an unvalidated location header pointing towards the attacker-controlled site. This flaw arises from poor validation of user-generated inputs and reliance on client data for redirection. The endpoint is vulnerable as it directly processes user inputs without adequate security checks.

When exploited, open redirect vulnerabilities can cause significant damage by aiding phishing attacks, leading to sensitive information theft, including login credentials and personal data. Users may unwittingly give away their data to malicious sites, thinking they are interacting with a legitimate service. An organization’s brand trust can suffer due to perceived insecurity, potentially impacting customer retention and acquisition. Additionally, it might lead to unauthorized actions being performed on behalf of the user, compromising the safety of associated accounts. The organization might face legal consequences if the data breach leads to user information being compromised.

REFERENCES

• https://packetstormsecurity.com/files/125931/ASP-Nuke-2.0.7-Open-Redirect.html