Vulnerability 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
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.13.0, < 4.14.303 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2cMailing ListPatch
- https://kernel.dance/#2c02d41d71f90a5168391b6a5f2954112ba2307cPatch
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2cMailing ListPatch
- https://kernel.dance/#2c02d41d71f90a5168391b6a5f2954112ba2307cPatch
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20230331-0006/
FAQ
What is CVE-2023-0461?
CVE-2023-0461 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2023-0461?
CVE-2023-0461 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-0461?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.