CVE-2022-4337 in OpenvSwitch
Summary
by MITRE • 01/11/2023
An out-of-bounds read in Organization Specific TLV was found in various versions of OpenvSwitch.
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Analysis
by VulDB Data Team • 02/01/2023
The vulnerability identified as CVE-2022-4337 represents a critical out-of-bounds read condition within the Organization Specific TLV processing functionality of OpenvSwitch implementations. This issue manifests when the software encounters malformed or specially crafted Organization Specific TLV structures during network packet processing, potentially leading to system instability or unauthorized information disclosure. The vulnerability affects multiple versions of the OpenvSwitch software, making it a widespread concern for network infrastructure deployments that rely on this virtualization networking component.
The technical flaw stems from insufficient input validation and boundary checking within the TLV (Type-Length-Value) parsing logic specifically designed for Organization Specific TLV structures. When processing these particular TLV elements, the OpenvSwitch implementation fails to properly validate the length field against the actual data buffer, allowing an attacker to craft malicious packets that trigger memory access violations. This out-of-bounds read occurs at the network packet parsing layer, where the software attempts to access memory locations beyond the allocated buffer boundaries. The vulnerability aligns with CWE-129, which addresses insufficient validation of length fields, and CWE-787, concerning out-of-bounds write operations that can lead to information disclosure or system compromise.
The operational impact of this vulnerability extends beyond simple denial-of-service conditions, as it can potentially enable information leakage from the system memory, exposing sensitive data such as cryptographic keys, network credentials, or internal system information. Attackers exploiting this vulnerability could leverage the out-of-bounds read to gain insights into the system's memory layout, potentially facilitating more sophisticated attacks such as privilege escalation or remote code execution. The vulnerability affects network virtualization environments where OpenvSwitch serves as the primary networking component, including cloud infrastructure, software-defined networking deployments, and virtual machine environments that depend on this networking stack for inter-vm communication and network isolation.
Mitigation strategies for CVE-2022-4337 require immediate patch application from vendors, as the vulnerability directly impacts the core networking functionality of affected systems. Organizations should prioritize updating their OpenvSwitch installations to versions that include proper input validation and boundary checking for TLV structures. Additionally, network administrators should implement monitoring solutions to detect anomalous packet patterns that might indicate exploitation attempts, while also considering network segmentation and access controls to limit potential attack surface. The vulnerability demonstrates the importance of robust input validation in network processing components, aligning with ATT&CK technique T1059.007 for input validation bypass and highlighting the need for defensive measures against memory corruption vulnerabilities in network infrastructure software.