CVE-2023-1076

Public on 2023-03-21
Modified on 2024-03-01
Description
Due to a type confusion during initializations, the tun and tap sockets in the Linux Kernel have their socket UID hardcoded to 0, i.e. root. While it will be often correct, as TUN/TAP devices require CAP_NET_ADMIN, it may not always be the case. The socket UID may be used for network filtering and routing, thus TUN/TAP sockets may be incorrectly managed, potentially bypassing network filters based on UID.
Severity
Medium severity
Medium
CVSS v3 Base Score
4.7
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 1 kernel Pending Fix
Amazon Linux 2 - Core kernel Pending Fix
Amazon Linux 2 - Kernel-5.10 Extra kernel 2023-03-17 ALAS2KERNEL-5.10-2023-028 Fixed
Amazon Linux 2 - Kernel-5.15 Extra kernel 2023-03-17 ALAS2KERNEL-5.15-2023-015 Fixed
Amazon Linux 2 - Kernel-5.4 Extra kernel 2023-03-17 ALAS2KERNEL-5.4-2023-043 Fixed
Amazon Linux 2023 kernel 2023-03-20 ALAS2023-2023-138 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD CVSSv3 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N