CVE-2007-2047 in Openads
Summary
by MITRE
CRLF injection vulnerability in www/delivery/ck.php in Openads 2.3 (aka Max Media Manager, MMM) before 0.3.31-alpha-pr3 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the destination parameter. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 08/29/2018
The CVE-2007-2047 vulnerability represents a critical CRLF injection flaw in the Openads 2.3 advertising platform, specifically within the www/delivery/ck.php component. This vulnerability falls under the CWE-113 category, which addresses improper neutralization of CRLF characters within HTTP headers, making it a prime example of HTTP response splitting attacks. The vulnerability affects the Max Media Manager (MMM) version 2.3 and earlier versions before the 0.3.31-alpha-pr3 release, creating a significant security risk for organizations relying on this advertising management system.
The technical exploitation of this vulnerability occurs through the manipulation of the destination parameter in the ck.php script, where attackers can inject carriage return line feed (CRLF) sequences to inject arbitrary HTTP headers into the response. This injection capability allows threat actors to perform HTTP response splitting attacks, where they can inject malicious headers that can be used to redirect users to malicious websites, steal session cookies, or inject malicious content into web responses. The vulnerability specifically targets the parameter validation mechanism, failing to properly sanitize user input before incorporating it into HTTP response headers, which directly violates security principles outlined in the OWASP Top Ten and the CWE database.
The operational impact of this vulnerability extends beyond simple header injection, as it enables sophisticated attack vectors that can compromise user sessions and redirect traffic to malicious destinations. Attackers can leverage this vulnerability to create split responses that appear legitimate to browsers, making detection more difficult and allowing for successful session hijacking or cross-site scripting attacks. The vulnerability's presence in an advertising delivery system creates additional risks since it could be used to inject malicious advertisements or redirect users to phishing sites, potentially affecting thousands of users who interact with the advertising platform. This represents a significant risk to both the platform's integrity and the security of end users, as the vulnerability can be exploited through simple parameter manipulation.
Organizations should implement immediate mitigations including input validation and sanitization of all user-supplied parameters, particularly those used in HTTP header construction. The recommended approach involves filtering or encoding CRLF characters within the destination parameter before processing, implementing proper header validation mechanisms, and upgrading to the patched version 0.3.31-alpha-pr3 or later. Security measures should also include monitoring for suspicious header injection patterns and implementing web application firewalls that can detect and block CRLF injection attempts. The vulnerability demonstrates the importance of proper input validation and output encoding in preventing HTTP response splitting attacks, aligning with the ATT&CK framework's defense evasion techniques that target HTTP header manipulation for malicious purposes. Organizations must also consider implementing proper access controls and network segmentation to limit the potential impact of such vulnerabilities in their advertising infrastructure.