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Ubuntu: USN-4284-1 (CVE-2019-19241): Linux kernel vulnerabilities

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Ubuntu: USN-4284-1 (CVE-2019-19241): Linux kernel vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
12/17/2019
Created
02/20/2020
Added
02/19/2020
Modified
04/14/2021

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.

Solution(s)

  • ubuntu-upgrade-linux-image-5-3-0-1009-oracle
  • ubuntu-upgrade-linux-image-5-3-0-1010-kvm
  • ubuntu-upgrade-linux-image-5-3-0-1011-aws
  • ubuntu-upgrade-linux-image-5-3-0-1012-gcp
  • ubuntu-upgrade-linux-image-5-3-0-1013-azure
  • ubuntu-upgrade-linux-image-5-3-0-1018-raspi2
  • ubuntu-upgrade-linux-image-5-3-0-40-generic
  • ubuntu-upgrade-linux-image-5-3-0-40-generic-lpae
  • ubuntu-upgrade-linux-image-5-3-0-40-lowlatency
  • ubuntu-upgrade-linux-image-5-3-0-40-snapdragon
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-edge
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-edge
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-raspi2-hwe-18-04
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04

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