CVE-2016-9128 in Adserver
Summary
by MITRE
Revive Adserver before 3.2.3 suffers from reflected XSS. The affiliate-preview.php script in www/admin is vulnerable to a reflected XSS attack. This vulnerability could be used by an attacker to steal the session ID of an authenticated user, by tricking them into visiting a specifically crafted URL.
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Analysis
by VulDB Data Team • 11/22/2022
The CVE-2016-9128 vulnerability affects Revive Adserver versions prior to 3.2.3 and represents a critical reflected cross-site scripting flaw in the affiliate-preview.php script located within the www/admin directory. This vulnerability stems from inadequate input validation and output sanitization mechanisms that fail to properly escape or encode user-supplied data before incorporating it into web responses. The flaw exists because the application directly reflects user-controllable parameters from HTTP request headers or query strings without appropriate security measures to prevent malicious script execution within the victim's browser context.
The technical implementation of this vulnerability allows attackers to craft malicious URLs that, when visited by authenticated users, execute arbitrary JavaScript code in the victim's browser. The reflected nature of this XSS means that the malicious payload is embedded within the URL itself and executed by the victim's browser when the page loads, making it particularly dangerous for authenticated sessions. Attackers can exploit this by embedding malicious scripts that steal session cookies, redirect users to malicious sites, or perform unauthorized actions on behalf of the authenticated user. This vulnerability directly maps to CWE-79 which categorizes cross-site scripting flaws as weaknesses in input validation and output encoding.
The operational impact of CVE-2016-9128 is severe for organizations using vulnerable Revive Adserver installations, as it provides attackers with a means to hijack authenticated user sessions and potentially gain full administrative control over the advertising platform. Successful exploitation could lead to unauthorized access to sensitive advertising data, manipulation of ad campaigns, creation of malicious advertisements, and potential lateral movement within the network infrastructure. The vulnerability is particularly concerning because it targets the administrative interface, making it a prime target for privilege escalation attacks and unauthorized system compromise.
Mitigation strategies for this vulnerability include immediate patching to Revive Adserver version 3.2.3 or later, which contains the necessary input validation and output encoding fixes. Organizations should implement comprehensive input sanitization measures that validate and escape all user-supplied data before processing, particularly for parameters used in dynamic content generation. Web Application Firewall rules can be deployed to detect and block suspicious payloads targeting the affiliate-preview.php endpoint, though this should not replace proper patching. Security headers such as Content Security Policy should be implemented to prevent execution of unauthorized scripts, and regular security auditing of web applications should be conducted to identify similar vulnerabilities. This vulnerability aligns with ATT&CK technique T1531 which focuses on establishing persistence through web application vulnerabilities, and T1071 which covers application layer protocols including web-based attacks that leverage XSS flaws for session hijacking and privilege escalation.