CVE-2006-1409 in Vavoom
Summary
by MITRE
Buffer overflow in Vavoom 1.19.1 and earlier allows remote attackers to cause a denial of service (application crash) via an invalid comprLength value in a compressed packet.
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Analysis
by VulDB Data Team • 03/26/2019
The vulnerability identified as CVE-2006-1409 represents a critical buffer overflow flaw within Vavoom version 1.19.1 and earlier implementations. This issue manifests when the application processes compressed network packets containing malformed comprLength values, creating a scenario where insufficient input validation leads to memory corruption. The flaw resides in the decompression routine that fails to properly bounds-check the comprLength parameter before using it to allocate memory for decompressed data structures. This type of vulnerability falls under CWE-121, which encompasses buffer overflow conditions where insufficient checks are performed on the size of data being copied into fixed-length buffers.
The technical exploitation of this vulnerability occurs during network packet processing when a remote attacker crafts a malicious packet with an invalid comprLength value that exceeds the allocated buffer boundaries. When the Vavoom application attempts to decompress the packet using this malformed value, it allocates insufficient memory or overflows existing buffers, resulting in memory corruption that ultimately causes the application to crash. The vulnerability specifically targets the decompression logic in the network protocol handling layer, where compressed data streams are processed and converted into their original form for further processing within the game engine. This flaw demonstrates poor input validation practices and inadequate memory management in network protocol implementations.
The operational impact of this vulnerability extends beyond simple denial of service, as it represents a potential vector for more sophisticated attacks within the context of networked gaming environments. When exploited, the vulnerability can cause persistent application crashes that disrupt gameplay sessions and potentially affect server availability in multiplayer scenarios. The remote nature of the attack means that adversaries do not require local access to the system, making it particularly dangerous in networked applications where multiple users interact through shared servers. This vulnerability aligns with ATT&CK technique T1203, which describes the exploitation of input validation flaws to cause application instability and denial of service conditions.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements. The most direct solution involves implementing proper bounds checking on comprLength values before any memory allocation occurs, ensuring that decompression parameters fall within acceptable ranges. Additionally, developers should implement robust input validation mechanisms that verify all network packet parameters against predefined constraints and employ defensive programming techniques such as stack canaries and memory corruption detection. The fix should also include proper error handling that gracefully manages malformed input rather than allowing the application to crash. Organizations should consider implementing network segmentation and access controls to limit exposure to such vulnerabilities in production environments. This vulnerability serves as a reminder of the critical importance of validating all external inputs and implementing proper memory management practices in networked applications, particularly those handling compressed data streams where buffer overflows can occur during decompression operations.