CVE-2009-4159 in Direct Mail
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the newsletter configuration feature in the backend module in the Direct Mail (direct_mail) extension 2.6.4 and earlier for TYPO3 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 12/20/2017
The CVE-2009-4159 vulnerability represents a critical cross-site scripting flaw within the Direct Mail extension for TYPO3 content management system. This vulnerability specifically affects version 2.6.4 and earlier, targeting the newsletter configuration feature within the backend module. The flaw enables authenticated attackers to execute malicious scripts in the context of other users' browsers, potentially compromising the entire TYPO3 installation and user data integrity. The vulnerability stems from inadequate input validation and output sanitization mechanisms within the extension's administrative interface, creating a persistent security risk for organizations relying on this email marketing solution.
The technical exploitation of this vulnerability occurs through unspecified vectors within the newsletter configuration functionality, allowing authenticated users with sufficient privileges to inject malicious web scripts or HTML code into the system. This type of vulnerability falls under CWE-79, which specifically addresses Cross-Site Scripting flaws in software applications. The attack vector typically involves manipulating form inputs or configuration parameters within the backend administrative interface, where the malicious code gets stored and subsequently executed when other users access the affected pages. The vulnerability is particularly dangerous because it operates within the backend environment, where users typically possess elevated privileges and access to sensitive system functions.
The operational impact of CVE-2009-4159 extends beyond simple script injection, as it can enable attackers to perform various malicious activities including session hijacking, data exfiltration, and privilege escalation. An attacker who successfully exploits this vulnerability could potentially gain access to administrative panels, modify content, steal user credentials, or even install malware on the affected TYPO3 system. The vulnerability's presence in the backend module means that compromised systems could be used as launching points for further attacks against internal networks or as persistent backdoors for continued unauthorized access. This makes the vulnerability particularly dangerous in enterprise environments where TYPO3 installations often serve as critical business infrastructure components.
Organizations affected by this vulnerability should immediately upgrade to a patched version of the Direct Mail extension, as the vulnerability was addressed in subsequent releases through proper input validation and output encoding mechanisms. System administrators should implement comprehensive monitoring of backend administrative activities to detect potential exploitation attempts, while also reviewing user access controls and implementing principle of least privilege configurations. The vulnerability aligns with ATT&CK technique T1566, which covers credential harvesting through social engineering and malicious web content, and T1059, which addresses command and scripting interpreter usage. Security teams should also consider implementing web application firewalls and content security policies to mitigate potential exploitation attempts, while conducting regular security assessments of all TYPO3 extensions to identify similar vulnerabilities in the broader ecosystem.