Detections
Analytics
CVE-2019-19241
high
Description
In the Linux kernel before 5.4.2, the io_uring feature leads to requests that inadvertently have UID 0 and full capabilities, aka CID-181e448d8709. This is related to fs/io-wq.c, fs/io_uring.c, and net/socket.c. For example, an attacker can bypass intended restrictions on adding an IPv4 address to the loopback interface. This occurs because IORING_OP_SENDMSG operations, although requested in the context of an unprivileged user, are sometimes performed by a kernel worker thread without considering that context.
References
https://usn.ubuntu.com/4284-1/
https://security.netapp.com/advisory/ntap-20200103-0001/
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2
https://bugs.chromium.org/p/project-zero/issues/detail?id=1975