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Oracle Linux: (CVE-2021-27363) (Multiple Advisories): Unbreakable Enterprise kernel-container security update

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Oracle Linux: (CVE-2021-27363) (Multiple Advisories): Unbreakable Enterprise kernel-container security update

Severity
4
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:P)
Published
03/07/2021
Created
03/19/2021
Added
03/18/2021
Modified
04/13/2021

Description

An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.

Solution(s)

  • oracle-linux-upgrade-kernel
  • oracle-linux-upgrade-kernel-uek
  • oracle-linux-upgrade-kernel-uek-container
  • oracle-linux-upgrade-kernel-uek-container-debug
  • oracle-linux-upgrade-kernel-uek-debug
  • oracle-linux-upgrade-kernel-uek-debug-devel
  • oracle-linux-upgrade-kernel-uek-devel
  • oracle-linux-upgrade-kernel-uek-doc
  • oracle-linux-upgrade-kernel-uek-firmware
  • oracle-linux-upgrade-kernel-uek-headers
  • oracle-linux-upgrade-kernel-uek-tools
  • oracle-linux-upgrade-kernel-uek-tools-libs
  • oracle-linux-upgrade-kernel-uek-tools-libs-devel
  • oracle-linux-upgrade-perf
  • oracle-linux-upgrade-python-perf

References

  • ELSA-2021-9175
  • CVE-2021-27363
  • USN-4883-1
  • USN-4887-1
  • USN-4889-1
  • USN-4901-1

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