CVE-2015-7365 in Adserver
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the plugin upgrade form in Revive Adserver before 3.2.2 allows remote attackers to inject arbitrary web script or HTML via the filename of an uploaded file containing errors.
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Analysis
by VulDB Data Team • 06/21/2022
The CVE-2015-7365 vulnerability represents a critical cross-site scripting flaw discovered in Revive Adserver versions prior to 3.2.2, specifically within the plugin upgrade functionality. This vulnerability exposes the system to remote code execution risks through malicious web script injection, creating a significant security exposure for organizations relying on the platform for digital advertising operations. The flaw resides in how the system processes uploaded plugin files during the upgrade process, where error messages containing the filename are not properly sanitized before being rendered in the user interface.
The technical exploitation of this vulnerability occurs when an attacker uploads a malicious plugin file with a filename designed to contain malicious script content. During the upgrade process, when the system encounters errors related to the uploaded file, it displays these error messages in the web interface without adequate input validation or output encoding. This creates an environment where attacker-controlled script code can be executed within the context of other users' browsers who view the error messages, effectively enabling persistent cross-site scripting attacks. The vulnerability specifically targets the plugin upgrade form, which represents a high-privilege interface where administrators might upload and install third-party plugins, making it an attractive target for attackers seeking to establish persistent access to advertising platforms.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform session hijacking, steal administrative credentials, redirect users to malicious sites, or even execute arbitrary commands on the affected server. Given that Revive Adserver is commonly used for managing online advertising campaigns, compromised systems could lead to unauthorized access to sensitive advertising data, manipulation of ad delivery, and potential financial losses through fraudulent click generation. The vulnerability affects the core administrative functionality of the platform, potentially allowing attackers to escalate privileges and gain full control over the advertising infrastructure.
Organizations should implement immediate mitigations including upgrading to Revive Adserver version 3.2.2 or later, which contains the necessary patches to address the input validation flaws in the plugin upload process. Additional defensive measures include implementing strict file type validation, sanitizing all user-supplied input before display, and employing content security policies to prevent script execution in error messages. Security professionals should also consider implementing web application firewalls to monitor for suspicious upload patterns and ensure that error messages are properly encoded when displayed in user interfaces. This vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and represents a typical attack vector categorized under the ATT&CK technique T1059.007 for scripting languages, demonstrating how insecure input handling can lead to persistent security breaches in web applications.