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CVE-2023-6546

Description

A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system.

POC

Reference

- http://www.openwall.com/lists/oss-security/2024/04/10/18

- http://www.openwall.com/lists/oss-security/2024/04/10/21

- http://www.openwall.com/lists/oss-security/2024/04/11/7

- http://www.openwall.com/lists/oss-security/2024/04/11/9

- http://www.openwall.com/lists/oss-security/2024/04/16/2

- http://www.openwall.com/lists/oss-security/2024/04/17/1

Github

- https://github.com/Nassim-Asrir/ZDI-24-020

- https://github.com/fkie-cad/nvd-json-data-feeds

- https://github.com/harithlab/CVE-2023-6546

- https://github.com/marklogic/marklogic-docker

- https://github.com/xairy/linux-kernel-exploitation

- https://github.com/zerozenxlabs/ZDI-24-020