CVE-2009-4062 in Printfriendly
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the Printfriendly module 6.x before 6.x-1.6 for Drupal allow remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 01/23/2019
The CVE-2009-4062 vulnerability represents a critical security flaw in the Printfriendly module for Drupal, specifically affecting versions prior to 6.x-1.6. This vulnerability falls under the category of cross-site scripting attacks, which are among the most prevalent and dangerous web application security issues. The Printfriendly module, designed to enable users to print web pages with enhanced formatting, became a vector for malicious code injection due to inadequate input validation and output encoding mechanisms. The vulnerability was particularly concerning as it affected the widely used Drupal content management system, which powers numerous websites and web applications globally.
The technical implementation of this XSS vulnerability stemmed from insufficient sanitization of user-supplied input within the module's code. Attackers could exploit this weakness by crafting malicious payloads that would be executed in the context of other users' browsers when they accessed pages containing the vulnerable module. The unspecified vectors mentioned in the description indicate that the vulnerability could be triggered through multiple entry points within the module's functionality, making it particularly dangerous as defenders had difficulty predicting all potential attack surfaces. This type of vulnerability typically occurs when web applications fail to properly validate or encode data before rendering it in web pages, allowing malicious scripts to be injected and executed in the browser context of unsuspecting users.
The operational impact of CVE-2009-4062 was significant for Drupal sites utilizing the Printfriendly module, as it could lead to various malicious activities including session hijacking, credential theft, defacement of web pages, and redirection to malicious websites. Attackers could leverage this vulnerability to steal user sessions, potentially gaining unauthorized access to administrative functions or user accounts. The vulnerability also posed risks to data integrity and confidentiality, as malicious scripts could capture user input or exfiltrate sensitive information. Organizations running affected Drupal installations faced potential reputational damage, legal implications, and increased risk of further compromise if attackers used the initial XSS vector as a foothold for more extensive attacks. The vulnerability's persistence across multiple vectors meant that even sites with otherwise secure configurations could be compromised if the Printfriendly module was installed.
Security mitigations for CVE-2009-4062 centered around immediate patching of the Printfriendly module to version 6.x-1.6 or later, which contained proper input validation and output encoding fixes. Organizations should have implemented comprehensive security monitoring to detect any exploitation attempts and conducted thorough vulnerability assessments of their Drupal installations to identify other potentially vulnerable modules. The remediation process required careful testing of the updated module to ensure compatibility with existing site functionality, as well as verification that all XSS vectors were properly addressed. Additionally, implementing proper content security policies, input validation at multiple layers, and regular security audits would have provided additional defense-in-depth measures against similar vulnerabilities. This vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and represents a classic example of how third-party modules can introduce security risks into otherwise secure web applications, reinforcing the importance of module security vetting and regular updates. The incident highlighted the critical need for maintaining up-to-date security patches and the potential for attackers to leverage seemingly minor vulnerabilities as entry points for more extensive compromises.