VULNERABILITY INTELLIGENCE
CVE-2023-30312
CVSS score7.3 HIGH
EPSS probability0.29%
CISA KEVNot currently listed
Published2024-05-28
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
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.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-203