CVE-2022-27418 in Tcpreplay
Summary
by MITRE • 04/13/2022
Tcpreplay v4.4.1 has a heap-based buffer overflow in do_checksum_math at /tcpedit/checksum.c.
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Analysis
by VulDB Data Team • 05/13/2026
The vulnerability identified as CVE-2022-27418 represents a critical heap-based buffer overflow within the Tcpreplay tool version 4.4.1, specifically within the do_checksum_math function located in the tcpedit/checksum.c source file. This issue arises during network packet processing where the application handles checksum calculations for captured network traffic. The buffer overflow occurs when the application processes malformed or specially crafted packet data that exceeds the allocated memory boundaries, potentially allowing attackers to execute arbitrary code or cause denial of service conditions.
The technical flaw manifests through improper memory management during checksum calculation operations where input data from network packets is processed without adequate bounds checking. The heap-based nature of this vulnerability means that the overflow occurs in dynamically allocated memory regions, making it particularly dangerous as it can corrupt heap metadata and lead to unpredictable behavior. This type of vulnerability falls under CWE-121 heap-based buffer overflow category, which is classified as a critical weakness in memory safety. The vulnerability is particularly concerning because Tcpreplay is commonly used for replaying network captures and packet manipulation, making it a potential target for attackers seeking to compromise systems during network analysis or security testing activities.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to encompass potential remote code execution capabilities. When exploited, the buffer overflow could allow malicious actors to inject and execute arbitrary code within the context of the Tcpreplay process, potentially leading to full system compromise. The vulnerability affects any system running Tcpreplay version 4.4.1 that processes untrusted network packet data, including security researchers, network administrators, and penetration testers who rely on this tool for network analysis. This risk is amplified in environments where Tcpreplay is used to process packets from potentially malicious sources, such as network monitoring systems or security testing frameworks that may encounter crafted attack packets.
Mitigation strategies for CVE-2022-27418 should prioritize immediate patching of Tcpreplay to version 4.4.2 or later, which contains the necessary fixes for the buffer overflow vulnerability. Organizations should also implement network segmentation and access controls to limit exposure of systems running Tcpreplay to untrusted packet data sources. Additional defensive measures include deploying network intrusion detection systems that can identify and block suspicious packet patterns that may exploit this vulnerability, implementing proper input validation and sanitization for all packet processing operations, and conducting regular security assessments of network analysis tools in use. From an ATT&CK perspective, this vulnerability aligns with techniques involving code injection and privilege escalation, making it particularly relevant for defensive security operations that focus on protecting network infrastructure and analysis tools from exploitation.