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An exploitable firmware modification vulnerability was discovered on the Netgear WPN824EXT WiFi Range Extender. An attacker can conduct a MITM attack to modify the user-uploaded firmware image and bypass the CRC check. A successful attack can either introduce a backdoor to the device or make the device DoS. This affects Firmware Version: 1.1.1_1.1.9.

CVE-2022-38955 is a high-severity firmware modification vulnerability affecting the Netgear WPN824EXT WiFi Range Extender, specifically firmware versions from 1.1.1 through 1.1.9. The vulnerability allows an attacker to perform a Man-in-the-Middle (MITM) attack during the firmware upload process. By intercepting and modifying the user-uploaded firmware image, the attacker can bypass the device's CRC (Cyclic Redundancy Check) integrity verification mechanism. This bypass enables the attacker to inject malicious firmware onto the device without detection. The consequences of a successful exploit include the introduction of a persistent backdoor, which could allow unauthorized remote access and control over the device, or the ability to cause a Denial of Service (DoS), rendering the device inoperable. The vulnerability is rooted in improper validation of firmware integrity (CWE-354: Improper Validation of Integrity Check Value), which is critical for maintaining device trustworthiness. The CVSS v3.1 base score is 7.5, reflecting high severity, with attack vector being network-based (remote), requiring high attack complexity, no privileges, and user interaction (uploading firmware). The impact spans confidentiality, integrity, and availability, as the attacker can compromise device security and disrupt network connectivity. No known exploits in the wild have been reported to date, and no official patches or firmware updates have been linked in the provided data. This vulnerability highlights the risks associated with firmware update mechanisms that lack robust cryptographic verification and secure transmission channels.

Detailed information about CVE-2022-38955: n/a in n/a affecting n/a n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2022-38955: n/a in n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2022-38955: n/a in n/a

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