CVE-2014-8617 in Fortimail
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Web Action Quarantine Release feature in the WebGUI in Fortinet FortiMail before 4.3.9, 5.0.x before 5.0.8, 5.1.x before 5.1.5, and 5.2.x before 5.2.3 allows remote attackers to inject arbitrary web script or HTML via the release parameter to module/releasecontrol.
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Analysis
by VulDB Data Team • 03/11/2022
The CVE-2014-8617 vulnerability represents a critical cross-site scripting flaw within Fortinet FortiMail's WebGUI interface, specifically affecting versions prior to the mentioned security patches. This vulnerability resides in the Web Action Quarantine Release feature, which is designed to allow administrators to release quarantined emails back to their intended recipients. The flaw manifests when the system fails to properly sanitize user input submitted through the release parameter within the module/releasecontrol endpoint, creating an avenue for malicious actors to inject arbitrary web scripts or HTML code into the application's response.
The technical nature of this vulnerability aligns with CWE-79, which specifically addresses Cross-Site Scripting attacks where untrusted data is incorporated into web pages without proper validation or encoding. This weakness enables attackers to execute malicious scripts in the context of the victim's browser session, potentially leading to session hijacking, credential theft, or unauthorized actions within the FortiMail administrative interface. The vulnerability's location within the WebGUI module indicates that it affects the application's user-facing interface rather than backend systems, making it particularly dangerous as it can be exploited through standard web browser interactions.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with potential access to privileged administrative functions within the FortiMail system. An attacker could craft malicious payloads that, when executed in an administrator's browser session, could reveal sensitive information about quarantined emails, manipulate email release decisions, or potentially escalate privileges within the system. The vulnerability affects multiple version lines of FortiMail, indicating it was a widespread issue that required patching across different release branches, suggesting the flaw was fundamental to the application's input handling mechanisms rather than a localized bug.
Organizations utilizing affected FortiMail versions face significant risk from this vulnerability, as it could enable attackers to bypass email security controls and potentially gain unauthorized access to sensitive email communications. The attack vector requires minimal privileges, as the vulnerability can be exploited remotely without authentication, making it particularly dangerous in environments where FortiMail is exposed to untrusted networks. Security practitioners should consider this vulnerability in relation to ATT&CK technique T1566, which covers social engineering tactics that can be used to exploit web application vulnerabilities. The impact is compounded by the fact that FortiMail administrators may unknowingly execute malicious scripts when reviewing quarantined emails, creating a dangerous feedback loop where the security tool itself becomes a vector for compromise.
Mitigation strategies for CVE-2014-8617 should prioritize immediate patching of all affected FortiMail versions to the latest available releases, as Fortinet would have provided security updates addressing this specific XSS vulnerability. Network segmentation and access controls should be implemented to limit exposure of the WebGUI interface to trusted networks only, reducing the attack surface for remote exploitation attempts. Input validation and output encoding mechanisms should be strengthened across all web application components to prevent similar vulnerabilities from emerging in the future. Regular security assessments and penetration testing should be conducted to identify additional XSS vulnerabilities within the FortiMail environment, while also implementing web application firewalls to detect and block suspicious script injection attempts. The vulnerability serves as a reminder of the critical importance of proper input sanitization in web applications and the potential consequences when such protections are inadequate.