Oracle Linux: CVE-2023-1076: ELSA-2023-6583: kernel security, bug fix, and enhancement update (IMPORTANT) (Multiple Advisories)

Oracle Linux: CVE-2023-1076: ELSA-2023-6583:kernel security, bug fix, and enhancement update (IMPORTANT) (Multiple Advisories)

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:C/A:N)

Published

02/04/2023

Created

11/18/2023

Added

11/16/2023

Modified

11/29/2024

Description

A flaw was found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a type confusion in their initialization function. While it will be often correct, as tuntap devices require CAP_NET_ADMIN, it may not always be the case, e.g., a non-root user only having that capability. This would make tun/tap sockets being incorrectly treated in filtering/routing decisions, possibly bypassing network filters. A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and get unauthorized access to some resources.

Solution(s)

• oracle-linux-upgrade-kernel

References

• https://attackerkb.com/topics/cve-2023-1076
• CVE - 2023-1076
• ELSA-2023-6583