CVE-2014-0037 in Zarafa
Summary
by MITRE
The ValidateUserLogon function in provider/libserver/ECSession.cpp in Zarafa 5.00 before 7.1.8 beta2 allows remote attackers to cause a denial of service (crash) via vectors related to "a NULL pointer of the username."
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Analysis
by VulDB Data Team • 05/12/2026
The vulnerability identified as CVE-2014-0037 resides within the Zarafa email server software ecosystem, specifically within the ValidateUserLogon function located in the provider/libserver/ECSession.cpp file. This critical flaw affects Zarafa versions 5.00 through 7.1.7 beta2, presenting a significant security risk that can be exploited by remote attackers to execute denial of service attacks. The vulnerability manifests when the system encounters a NULL pointer associated with username validation, creating a condition that leads to application crashes and service unavailability.
The technical implementation of this vulnerability stems from inadequate input validation within the authentication processing pipeline. When the ValidateUserLogon function receives a malformed or null username parameter, it fails to properly handle the NULL pointer dereference scenario, resulting in an unhandled exception that terminates the application process. This represents a classic null pointer dereference vulnerability, which falls under the CWE-476 category of "NULL Pointer Dereference" and demonstrates poor error handling practices in the software's authentication subsystem. The flaw operates at the application level within the server-side processing logic, where user credentials are validated before granting access to the email services.
The operational impact of this vulnerability extends beyond simple service disruption, as it can be leveraged by malicious actors to systematically degrade the availability of email services for legitimate users. Remote attackers can craft specially formatted authentication requests containing NULL username values to trigger the crash condition, potentially leading to sustained denial of service conditions that can affect business operations and email communication. This vulnerability directly impacts the availability aspect of the CIA triad and can be classified under the ATT&CK technique T1499.004 for "Toggle Service" and T1566.002 for "Phishing with Malicious Attachment" when considering how attackers might exploit this to disrupt email services. The vulnerability affects the core authentication functionality of the Zarafa platform, potentially compromising email access for all users and requiring system administrators to implement emergency patches or service restarts.
Mitigation strategies for CVE-2014-0037 primarily involve applying the vendor-provided security patches released in Zarafa 7.1.8 beta2 and subsequent stable releases. System administrators should immediately upgrade to the patched versions to eliminate the vulnerability exposure. Additionally, implementing network-level controls such as access control lists and rate limiting on authentication endpoints can help reduce the effectiveness of exploitation attempts. The fix typically involves adding proper NULL pointer validation checks within the ValidateUserLogon function to gracefully handle malformed username inputs without crashing the application. Organizations should also consider implementing intrusion detection systems to monitor for suspicious authentication patterns that might indicate exploitation attempts. Security monitoring should focus on detecting unusual authentication request patterns and application crash events that could signal exploitation of this vulnerability. The remediation process should include thorough testing of the patched environment to ensure that legitimate authentication functionality remains intact while the vulnerability is eliminated.