CVE-2012-5875 in Firefly Media Server
Summary
by MITRE
Firefly Media Server 1.0.0.1359 allows remote attackers to cause a denial of service (NULL pointer dereference) via a (1) crafted Connection HTTP header; a return carriage control character in the (2) Accept Language header, (3) User-agent header, (4) Host header, or (5) protocol version; or a (6) crafted HTTP protocol version.
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Analysis
by VulDB Data Team • 07/03/2024
The Firefly Media Server version 1.0.0.1359 contains a critical vulnerability classified as CVE-2012-5875 that exposes the system to remote denial of service attacks through multiple HTTP header manipulation vectors. This vulnerability stems from inadequate input validation mechanisms within the server's HTTP parsing logic, creating exploitable conditions that can be leveraged by remote attackers to disrupt service availability. The flaw specifically manifests as a NULL pointer dereference condition that occurs when the server processes malformed HTTP headers without proper bounds checking or sanitization procedures. This type of vulnerability falls under the CWE-476 category of NULL Pointer Dereference, which represents a fundamental programming error where software attempts to access memory through a null reference, leading to application crashes and system instability. The attack surface is particularly broad as it affects six distinct HTTP header fields including Connection, Accept-Language, User-Agent, Host, and protocol version, making it exceptionally difficult to defend against through partial mitigations.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire media streaming infrastructure. When exploited, the NULL pointer dereference causes the Firefly Media Server process to crash and terminate unexpectedly, resulting in complete denial of service for legitimate users who rely on the media server for content delivery. The vulnerability's exploitation requires minimal technical expertise and can be accomplished through simple HTTP request crafting, making it particularly dangerous in environments where media servers are exposed to untrusted networks. Attackers can craft malicious HTTP requests with specially formatted control characters such as carriage return sequences in various header fields, or manipulate protocol version strings to trigger the memory access violation. The server's failure to properly validate and sanitize these inputs creates a persistent risk that can be exploited repeatedly, potentially leading to sustained service degradation or complete system unavailability. This vulnerability directly maps to the ATT&CK technique T1499.004 which describes Network Denial of Service attacks targeting network infrastructure components.
Mitigation strategies for CVE-2012-5875 should prioritize immediate patching of the Firefly Media Server software to address the underlying NULL pointer dereference issues. Organizations should implement network-level defenses including firewall rules that filter malformed HTTP headers and intrusion detection systems capable of identifying suspicious control character sequences in HTTP traffic. The implementation of input validation controls at the application layer becomes critical, requiring developers to enforce strict header sanitization procedures and implement proper error handling for NULL pointer conditions. Additionally, network segmentation strategies should isolate media servers from public-facing networks, while monitoring systems should be deployed to detect unusual crash patterns or service interruptions that may indicate exploitation attempts. The vulnerability highlights the importance of robust software security practices including code reviews focused on memory management, automated testing for boundary conditions, and regular security assessments to identify similar weaknesses in legacy systems. Organizations should also consider implementing rate limiting and connection throttling mechanisms to reduce the impact of potential exploitation attempts and provide additional layers of defense against denial of service attacks targeting HTTP parsing components.