CVE-2023-4194

Published Aug 7, 2023

Last updated a month ago

CVSS medium 5.5

Overview

Description
A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.
Source
secalert@redhat.com
NVD status
Modified
Products
linux_kernel, enterprise_linux, fedora, debian_linux

Risk scores

CVSS 3.1

Type
Primary
Base score
5.5
Impact score
3.6
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Severity
MEDIUM

Weaknesses

secalert@redhat.com
CWE-843
nvd@nist.gov
CWE-843

Social media

Hype score
Not currently trending

Configurations

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References

Sources include official advisories and independent security research.