CVE-2023-0461

2023-02-2200:00:00

ubuntu.com

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

4.3 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.0004 Low

EPSS

Percentile

5.3%

JSON

There is a use-after-free vulnerability in the Linux Kernel which can be
exploited to achieve local privilege escalation. To reach the vulnerability
kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be
configured, but the operation does not require any privilege. There is a
use-after-free bug of icsk_ulp_data of a struct inet_connection_sock. When
CONFIG_TLS is enabled, user can install a tls context (struct tls_context)
on a connected tcp socket. The context is not cleared if this socket is
disconnected and reused as a listener. If a new socket is created from the
listener, the context is inherited and vulnerable. The setsockopt TCP_ULP
operation does not require any privilege. We recommend upgrading past
commit 2c02d41d71f90a5168391b6a5f2954112ba2307c

Notes

Author	Note
sbeattie	reported by google kCTF, apparently.
rodrigo-zaiden	for some kernels, an extra commit was applied as a follow up commit: “UBUNTU: SAUCE: Fix inet_csk_listen_start after CVE-2023-0461” to properly address an error code variable during the backport. USN-5975-1 first publication included esm/xenial linux-gcp version 4.15.0-1146.162~16.04.1 by mistake, please refer to USN-6007-1.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-206.217UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-144.161UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-67.74UNKNOWN
ubuntu22.10noarchlinux< 5.19.0-35.36UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1151.164UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1097.105UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1031.35UNKNOWN
ubuntu22.10noarchlinux-aws< 5.19.0-1020.21UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1031.35~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1097.105~18.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-206.217	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-144.161	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-67.74	UNKNOWN
ubuntu	22.10	noarch	linux	< 5.19.0-35.36	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1151.164	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1097.105	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1031.35	UNKNOWN
ubuntu	22.10	noarch	linux-aws	< 5.19.0-1020.21	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1031.35~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1097.105~18.04.1	UNKNOWN