CVE-2020-10059: 
NixOS vulnerability analysis and mitigation

CVE-2020-10059 affects the UpdateHub module in the Zephyr operating system versions 2.1.0 and later. The vulnerability involves the disabling of DTLS peer checking, which creates a potential security risk by allowing for man-in-the-middle attacks (NVD CVE).

The vulnerability has a CVSS v3.1 Base Score of 4.8 (MEDIUM) with vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L. The issue is classified as CWE-295 (Improper Certificate Validation). While firmware images still require valid signatures, disabling DTLS peer checking removes a critical security layer that validates the identity of communicating parties (NVD CVE).

The vulnerability enables potential man-in-the-middle attacks by removing DTLS peer verification. While firmware images are protected by signature validation, the lack of peer checking eliminates the security benefits of using DTLS (Zephyr PR).

The vulnerability is exploitable over the network but requires high attack complexity. No authentication is required to exploit the vulnerability, though the attacker would need to be in a position to perform a man-in-the-middle attack (NVD CVE).

The issue was fixed through a patch that requires peer verification with DTLS. Users may need to install and use a root certificate for proper verification. The fix was implemented in the main branch and backported to versions 2.1 and 2.2 (Zephyr PR, PR 24997, PR 24999).