Huawei EulerOS: CVE-2023-0461: kernel security update

Huawei EulerOS: CVE-2023-0461: kernel security update

Severity

7

CVSS

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

Published

02/28/2023

Created

05/10/2023

Added

05/10/2023

Modified

01/28/2025

Description

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

Solution(s)

• huawei-euleros-2_0_sp9-upgrade-kernel
• huawei-euleros-2_0_sp9-upgrade-kernel-tools
• huawei-euleros-2_0_sp9-upgrade-kernel-tools-libs
• huawei-euleros-2_0_sp9-upgrade-python3-perf

References

• https://attackerkb.com/topics/cve-2023-0461
• CVE - 2023-0461
• EulerOS-SA-2023-1873