CVE-2007-6426 in RepliStor
Summary
by MITRE
Multiple heap-based buffer overflows in EMC RepliStor 6.2 SP2, and possibly earlier versions, allow remote attackers to execute arbitrary code via crafted compressed data.
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Analysis
by VulDB Data Team • 08/26/2019
The vulnerability identified as CVE-2007-6426 represents a critical heap-based buffer overflow issue affecting EMC RepliStor 6.2 SP2 and potentially earlier versions of the software. This flaw resides within the data compression handling mechanism of the RepliStor storage replication solution, which is widely deployed in enterprise environments for data protection and disaster recovery operations. The vulnerability manifests when the system processes crafted compressed data, creating a condition where attacker-controlled input can overwrite adjacent memory locations in the heap memory space, potentially leading to arbitrary code execution.
The technical exploitation of this vulnerability occurs through the improper handling of compressed data streams within the RepliStor application. When the system decompresses maliciously crafted data, the decompression routine fails to properly validate the size of the decompressed output relative to the allocated heap buffer. This allows an attacker to overflow the intended buffer boundaries and overwrite critical memory structures including return addresses, function pointers, or other control data. The heap-based nature of the overflow makes exploitation more complex than stack-based variants but still highly dangerous as it can lead to complete system compromise. According to CWE-121, this vulnerability maps directly to heap-based buffer overflow conditions where insufficient bounds checking permits memory corruption.
The operational impact of CVE-2007-6426 extends beyond simple code execution to encompass complete system compromise and data integrity violations within enterprise storage environments. Since RepliStor is designed for critical data protection and replication services, exploitation could result in unauthorized data access, modification, or deletion across replicated storage systems. Attackers leveraging this vulnerability could gain persistent access to storage networks, potentially affecting multiple systems within a replicated storage infrastructure. The remote attack vector eliminates the need for physical access or local network presence, making the vulnerability particularly dangerous for organizations with distributed storage deployments. This aligns with ATT&CK technique T1203 which describes techniques for gaining access to systems through remote exploitation of software vulnerabilities.
Mitigation strategies for CVE-2007-6426 should prioritize immediate patch deployment from EMC, as the vendor likely released security updates addressing the decompression routine validation issues. Organizations should implement network segmentation to limit access to RepliStor services and employ intrusion detection systems to monitor for suspicious compressed data traffic patterns. Additionally, input validation controls should be implemented at network boundaries to filter potentially malicious compressed data before it reaches the vulnerable application. Security teams should conduct thorough vulnerability assessments to identify all instances of affected RepliStor versions across their infrastructure and establish monitoring protocols for anomalous system behavior that might indicate exploitation attempts. The vulnerability demonstrates the importance of proper memory management practices and input validation in enterprise storage software, particularly when handling user-supplied compressed data streams.