CVE-2012-5877 in MediaHome
Summary
by MITRE
Nero MediaHome 4.5.8.0 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an HTTP header without a name.
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Analysis
by VulDB Data Team • 07/06/2025
Nero MediaHome version 4.5.8.0 and earlier contains a critical vulnerability that manifests as a null pointer dereference when processing malformed HTTP headers. This vulnerability falls under the category of denial of service attacks and represents a fundamental flaw in the application's input validation mechanisms. The specific condition occurs when the software encounters an HTTP header that lacks a name component, creating a scenario where the application attempts to dereference a null pointer during its processing routine. This type of vulnerability is particularly concerning because it can be exploited remotely without requiring any authentication or specialized privileges from the attacker.
The technical implementation of this vulnerability stems from inadequate error handling within the HTTP header parsing functionality of Nero MediaHome. When the application receives an HTTP request containing a header without a name, the parsing logic fails to properly validate the header structure before attempting to process it. This results in the software attempting to access memory locations through a null reference, causing an immediate crash of the application. The vulnerability is classified as a null pointer dereference according to the Common Weakness Enumeration catalog, specifically mapping to CWE-476 which describes the weakness of null pointer dereference. The absence of proper input sanitization and validation creates an exploitable path where remote attackers can craft malicious HTTP requests to trigger this condition.
The operational impact of this vulnerability extends beyond simple application instability, as it can be leveraged to create persistent denial of service conditions for users of Nero MediaHome. Attackers can remotely target systems running vulnerable versions of the software by sending specially crafted HTTP requests containing malformed headers, causing the application to crash repeatedly. This disruption affects legitimate users who rely on the media management capabilities of Nero MediaHome, potentially impacting their ability to access and manage their digital media collections. The vulnerability is particularly dangerous in networked environments where the application might be exposed to untrusted network traffic, as it requires no user interaction or authentication to exploit. The attack surface is broad since HTTP header parsing is a fundamental component of web-based applications and services.
Mitigation strategies for this vulnerability should focus on both immediate remediation and long-term architectural improvements. The most effective immediate solution involves upgrading to a patched version of Nero MediaHome that addresses the null pointer dereference issue through proper input validation and error handling. System administrators should implement network-level controls to filter out malformed HTTP traffic and monitor for suspicious patterns that might indicate exploitation attempts. Additionally, the application should be configured to run with minimal privileges and appropriate isolation mechanisms to limit the potential impact if exploitation occurs. Security teams should consider implementing intrusion detection systems that can identify and alert on malformed HTTP headers that match the vulnerability pattern. Organizations should also review their software inventory to identify other potentially vulnerable applications that might be susceptible to similar input validation flaws, as this represents a common class of vulnerability that affects many software applications. The remediation process should include thorough testing to ensure that the patched version properly handles all edge cases in HTTP header processing while maintaining functionality.