CVE-2023-1076

2023-03-2700:00:00

ubuntu.com

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

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

14.7%

JSON

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.

Bugs

Notes

Author	Note
rodrigo-zaiden	the fix for this CVE was determined as incorrect or incomplete, CVE-2023-4194 was published to address this.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< 5.4.0-152.169UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-75.82UNKNOWN
ubuntu22.10noarchlinux< 5.19.0-45.46UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1104.112UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1038.43UNKNOWN
ubuntu22.10noarchlinux-aws< 5.19.0-1027.28UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1003.3UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1038.43~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< anyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1110.116UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< 5.4.0-152.169	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-75.82	UNKNOWN
ubuntu	22.10	noarch	linux	< 5.19.0-45.46	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1104.112	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1038.43	UNKNOWN
ubuntu	22.10	noarch	linux-aws	< 5.19.0-1027.28	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1003.3	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1038.43~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1110.116	UNKNOWN