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cve[email protected]CVE-2023-4194
HistoryAug 07, 2023 - 2:15 p.m.

CVE-2023-4194

2023-08-0714:15:11
CWE-863
CWE-843
[email protected]
web.nvd.nist.gov
373
cve-2023-4194
linux kernel
tun/tap
network filters
unauthorized access
security vulnerability
nvd

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

6.1 Medium

AI Score

Confidence

High

1.7 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:L/AC:L/Au:S/C:N/I:P/A:N

0.0004 Low

EPSS

Percentile

5.2%

JSON

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.

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5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

6.1 Medium

AI Score

Confidence

High

1.7 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:L/AC:L/Au:S/C:N/I:P/A:N

0.0004 Low

EPSS

Percentile

5.2%

JSON
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