CVE-2023-30312

HighCVSS 7.3/10Last modified Jun 17, 2026

Description

An issue discovered in OpenWrt 18.06, 19.07, 21.02, 22.03, and beyond allows off-path attackers to hijack TCP sessions, which could lead to a denial of service, impersonating the client to the server (e.g., for access to files over FTP), and impersonating the server to the client (e.g., to deliver false information from a finance website). This occurs because nf_conntrack_tcp_no_window_check is true by default.

Metrics

CVSS 3.1 7.3/10CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-203

Affected software

No affected versions have been published.

Timeline

Published: May 28, 2024
Last modified: Jun 17, 2026
NVD status: Deferred

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