UBUNTU-CVE-2023-0461
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
02 / AFFECTED SOFTWARE
Affected packages
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03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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
05 / REFERENCES
Further evidence
- https://ubuntu.com/security/CVE-2023-0461
- https://ubuntu.com/security/notices/USN-5883-1
- https://ubuntu.com/security/notices/USN-5911-1
- https://ubuntu.com/security/notices/USN-5912-1
- https://ubuntu.com/security/notices/USN-5913-1
- https://ubuntu.com/security/notices/USN-5914-1
- https://ubuntu.com/security/notices/USN-5915-1
- https://ubuntu.com/security/notices/USN-5917-1
- https://ubuntu.com/security/notices/USN-5919-1
- https://ubuntu.com/security/notices/USN-5920-1
- https://ubuntu.com/security/notices/USN-5924-1
- https://ubuntu.com/security/notices/USN-5925-1
- https://ubuntu.com/security/notices/USN-5927-1
- https://ubuntu.com/security/notices/USN-5929-1
- https://ubuntu.com/security/notices/USN-5934-1
- https://ubuntu.com/security/notices/USN-5935-1
- https://ubuntu.com/security/notices/USN-5938-1
- https://ubuntu.com/security/notices/USN-5939-1
- https://ubuntu.com/security/notices/USN-5940-1
- https://ubuntu.com/security/notices/USN-5941-1
- https://ubuntu.com/security/notices/USN-5950-1
- https://ubuntu.com/security/notices/USN-5951-1
- https://ubuntu.com/security/notices/USN-5962-1
- https://ubuntu.com/security/notices/USN-5975-1
- https://ubuntu.com/security/notices/USN-5976-1
- https://ubuntu.com/security/notices/USN-6000-1
- https://ubuntu.com/security/notices/USN-6007-1
- https://www.cve.org/CVERecord?id=CVE-2023-0461