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Amazon Linux AMI 2: CVE-2021-27363: Security patch for kernel, kernel-livepatch-4.14.214-160.339, kernel-livepatch-4.14.219-161.340, kernel-livepatch-4.14.219-164.354 (Multiple Advisories)

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Amazon Linux AMI 2: CVE-2021-27363: Security patch for kernel, kernel-livepatch-4.14.214-160.339, kernel-livepatch-4.14.219-161.340, kernel-livepatch-4.14.219-164.354 (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:P)
Published
03/07/2021
Created
03/23/2021
Added
03/22/2021
Modified
01/16/2023

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)

  • amazon-linux-ami-2-upgrade-bpftool
  • amazon-linux-ami-2-upgrade-bpftool-debuginfo
  • amazon-linux-ami-2-upgrade-kernel
  • amazon-linux-ami-2-upgrade-kernel-debuginfo
  • amazon-linux-ami-2-upgrade-kernel-debuginfo-common-aarch64
  • amazon-linux-ami-2-upgrade-kernel-debuginfo-common-x86_64
  • amazon-linux-ami-2-upgrade-kernel-devel
  • amazon-linux-ami-2-upgrade-kernel-headers
  • amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-214-160-339
  • amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-214-160-339-debuginfo
  • amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-219-161-340
  • amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-219-161-340-debuginfo
  • amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-219-164-354
  • amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-219-164-354-debuginfo
  • amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-225-168-357
  • amazon-linux-ami-2-upgrade-kernel-tools
  • amazon-linux-ami-2-upgrade-kernel-tools-debuginfo
  • amazon-linux-ami-2-upgrade-kernel-tools-devel
  • amazon-linux-ami-2-upgrade-perf
  • amazon-linux-ami-2-upgrade-perf-debuginfo
  • amazon-linux-ami-2-upgrade-python-perf
  • amazon-linux-ami-2-upgrade-python-perf-debuginfo

References

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