There is a use-after-free vulnerability in the Linux...
High severity
Unreviewed
Published
Feb 28, 2023
to the GitHub Advisory Database
•
Updated May 11, 2023
Description
Published by the National Vulnerability Database
Feb 28, 2023
Published to the GitHub Advisory Database
Feb 28, 2023
Last updated
May 11, 2023
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
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