CVE-2019-19241

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.

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.39%

Vendor Advisory ubuntu.com Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org

Affected: n/a n/a

References

Link	Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2	vendor advisory mailing list
https://bugs.chromium.org/p/project-zero/issues/detail?id=1975	third party advisory mailing list
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=181e448d8709e517c9c7b523fcd209f24eb38ca7	patch vendor advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d69e07793f891524c6bbf1e75b9ae69db4450953	patch vendor advisory
https://security.netapp.com/advisory/ntap-20200103-0001/
https://usn.ubuntu.com/4284-1/	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-19241?: CVE-2019-19241 has been scored as a high severity vulnerability.
How to fix CVE-2019-19241?: To fix CVE-2019-19241, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-19241 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2019-19241 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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