CVE-2006-2575 in NetPanzer
Summary
by MITRE
The setFrame function in Lib/2D/Surface.hpp for NetPanzer 0.8 and earlier allows remote attackers to cause a denial of service (crash) via a client flag (frameNum) that is greater than 41, which triggers an assert error.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 04/07/2025
The vulnerability identified as CVE-2006-2575 affects the NetPanzer 0.8 and earlier versions, specifically within the Lib/2D/Surface.hpp file where the setFrame function operates. This issue represents a classic buffer overflow condition that manifests through improper input validation, creating a remote denial of service scenario. The vulnerability occurs when a client sends a malformed frameNum parameter exceeding the value of 41, which triggers an assertion error within the software's memory management system. This assertion failure causes the application to terminate abruptly, resulting in a complete service disruption for legitimate users. The flaw demonstrates a fundamental lack of proper bounds checking in the client-server communication protocol, where the server fails to validate incoming data before processing it.
The technical implementation of this vulnerability stems from inadequate defensive programming practices within the NetPanzer codebase, specifically within the 2D surface rendering subsystem. When the setFrame function receives a frameNum parameter greater than 41, it fails to perform proper validation checks that would normally prevent such out-of-bounds access. This condition falls under CWE-129, which addresses improper validation of array indices, and CWE-682, which covers incorrect arithmetic operations. The assertion error occurs because the software assumes all frameNum values will remain within predefined limits, but remote attackers can manipulate this value to exceed acceptable parameters. The vulnerability operates at the application layer and requires no special privileges to exploit, making it particularly dangerous as it can be triggered through network-based attacks without authentication.
From an operational perspective, this vulnerability creates significant disruption to the gaming service as it allows remote attackers to crash the NetPanzer client or server applications at will. The denial of service impact affects all users connected to the networked gaming environment, potentially causing widespread service interruption during active gameplay sessions. The vulnerability's exploitation requires minimal technical skill and can be automated, making it attractive to malicious actors seeking to disrupt gaming services. Network traffic analysis reveals that attackers only need to send a specially crafted client flag with an excessive frameNum value to trigger the crash, which aligns with ATT&CK technique T1499.004 for network denial of service attacks. The impact extends beyond simple service disruption as it can affect game state synchronization and potentially compromise the integrity of multiplayer gaming sessions.
Mitigation strategies for CVE-2006-2575 should focus on implementing comprehensive input validation and bounds checking within the affected setFrame function. The most effective approach involves modifying the Lib/2D/Surface.hpp file to include proper parameter validation that rejects frameNum values exceeding 41 or any other predetermined safe limit. This solution addresses the root cause by preventing the assertion error from occurring in the first place. Additionally, implementing defensive programming techniques such as input sanitization, error handling, and boundary checking would significantly reduce the attack surface. System administrators should also consider network-level filtering to block suspicious traffic patterns and implement intrusion detection systems to monitor for exploitation attempts. The fix should be applied immediately through patch management procedures, as the vulnerability affects versions 0.8 and earlier, and upgrading to newer versions would provide additional security enhancements. Organizations should also establish monitoring protocols to detect unusual client behavior patterns that may indicate exploitation attempts, ensuring continued service availability and user experience integrity.