Exploitation Summary
EIP tracks 1 public exploit for CVE-2019-19241. PoCs published by Google Security Research.
AI-analyzed exploit summary This exploit leverages a race condition in io_uring's IORING_OP_SENDMSG to escalate privileges by forcing a kernel worker thread to execute sendmsg() with root credentials. The PoC demonstrates adding an IPv4 address to the loopback interface without required privileges.
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.
Exploits (1)
This exploit leverages a race condition in io_uring's IORING_OP_SENDMSG to escalate privileges by forcing a kernel worker thread to execute sendmsg() with root credentials. The PoC demonstrates adding an IPv4 address to the loopback interface without required privileges.
References (6)
Scores
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H