CVE-2012-1087 in Bc Post2facebook
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Post data records to facebook (bc_post2facebook) extension before 0.2.2 for TYPO3 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 01/22/2018
The CVE-2012-1087 vulnerability represents a critical cross-site scripting flaw within the bc_post2facebook TYPO3 extension, specifically affecting versions prior to 0.2.2. This vulnerability resides in the extension's handling of post data records that are transmitted to Facebook, creating a significant security risk for TYPO3 content management system users who rely on this functionality. The vulnerability classification aligns with CWE-79, which specifically addresses cross-site scripting attacks where untrusted data is improperly incorporated into web pages without proper validation or escaping mechanisms.
The technical flaw manifests in the extension's insufficient input validation and output encoding processes when processing data that flows from TYPO3 into Facebook integration points. Attackers can exploit this weakness by crafting malicious input through unspecified vectors that ultimately get executed within the browser context of authenticated users. The vulnerability's impact extends beyond simple script execution as it enables attackers to manipulate user sessions, steal sensitive information, or redirect users to malicious websites. The unspecified nature of the attack vectors suggests multiple potential entry points within the extension's data handling processes, making the vulnerability particularly challenging to defend against comprehensively.
Operationally, this vulnerability poses severe risks to TYPO3 installations that utilize the bc_post2facebook extension for social media integration. When exploited, the XSS attack can compromise user sessions, allowing attackers to perform unauthorized actions on behalf of victims. The attack surface is particularly concerning because it targets the integration points between TYPO3 and Facebook, potentially enabling attackers to access Facebook accounts linked to the TYPO3 system or to manipulate content posted through the extension. This vulnerability directly impacts the integrity and confidentiality of web applications, as users may unknowingly execute malicious scripts that can persist in the browser environment and potentially compromise the entire user session.
The remediation strategy for CVE-2012-1087 requires immediate upgrading of the bc_post2facebook extension to version 0.2.2 or later, which contains the necessary patches to address the XSS vulnerability. Organizations should also implement comprehensive input validation and output encoding mechanisms throughout their TYPO3 installations, particularly in areas where user-supplied data is processed and displayed. Security measures should include implementing Content Security Policy headers, regular security audits of third-party extensions, and maintaining up-to-date vulnerability assessments of all installed TYPO3 extensions. Additionally, administrators should consider implementing web application firewalls and monitoring systems to detect potential exploitation attempts. The vulnerability demonstrates the critical importance of extension security in CMS environments and aligns with ATT&CK technique T1566, which covers the exploitation of vulnerabilities in web applications through various attack vectors including cross-site scripting. Organizations should also establish proper security governance practices to ensure timely patch management and extension vetting processes, as this vulnerability represents a common attack vector that has been historically exploited in web application security breaches.