USN-4901-1: Linux kernel (Trusty HWE) vulnerabilities

06 April 2021

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise ESM

Details

Adam Nichols discovered that heap overflows existed in the iSCSI subsystem
in the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)

It was discovered that the LIO SCSI target implementation in the Linux
kernel performed insufficient identifier checking in certain XCOPY
requests. An attacker with access to at least one LUN in a multiple
backstore environment could use this to expose sensitive information or
modify data. (CVE-2020-28374)

Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did
not properly restrict access to iSCSI transport handles. A local attacker
could use this to cause a denial of service or expose sensitive information
(kernel pointer addresses). (CVE-2021-27363)

Adam Nichols discovered that an out-of-bounds read existed in the iSCSI
subsystem in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or expose sensitive information (kernel
memory). (CVE-2021-27364)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

Related notices

  • USN-4889-1: linux-lts-xenial, linux-image-4.4.0-206-powerpc-smp, linux-image-omap, linux-image-powerpc-e500mc, linux-image-4.4.0-206-lowlatency, linux-image-powerpc-smp-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-smp, linux-image-3.13.0-185-powerpc-smp, linux-image-3.13.0-185-generic-lpae, linux-image-3.13.0-185-powerpc64-smp, linux-image-generic-lpae, linux-image-generic-pae, linux-image-generic-lts-raring, linux-image-4.4.0-206-powerpc-e500mc, linux-image-virtual, linux-image-4.4.0-206-generic, linux-image-3.13.0-185-generic, linux-image-powerpc64-emb, linux-image-generic-lpae-lts-saucy, linux-image-generic-lpae-lts-trusty, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic-lts-xenial, linux-image-lowlatency, linux-image-4.4.0-206-powerpc64-smp, linux-image-generic, linux, linux-image-powerpc-e500, linux-image-3.13.0-185-lowlatency, linux-image-lowlatency-pae, linux-image-virtual-lts-xenial, linux-image-3.13.0-185-powerpc-e500, linux-image-highbank, linux-image-generic-lts-saucy, linux-image-generic-lts-trusty, linux-image-powerpc64-smp-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-server, linux-image-powerpc-smp, linux-image-generic-lts-quantal, linux-image-3.13.0-185-powerpc-e500mc, linux-image-4.4.0-206-generic-lpae, linux-image-3.13.0-185-powerpc64-emb, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-206-powerpc64-emb
  • USN-4694-1: linux-image-powerpc-e500mc, linux-image-lowlatency-lts-xenial, linux-image-lowlatency-hwe-20.04-edge, linux-image-virtual, linux-image-powerpc-e500mc-lts-wily, linux-image-snapdragon-hwe-18.04-edge, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc-e500mc-lts-vivid, linux-image-generic-hwe-16.04, linux-image-generic-lpae-lts-wily, linux-image-powerpc-e500mc-lts-xenial, linux-image-generic, linux-image-lowlatency-hwe-16.04, linux-image-4.15.0-132-generic, linux-image-lowlatency-hwe-18.04-edge, linux-image-5.4.0-62-generic, linux-image-oem-20.04, linux-image-generic-lpae-hwe-20.04, linux-image-generic-lpae-hwe-16.04-edge, linux-image-generic-hwe-20.04, linux-image-5.8.0-38-lowlatency, linux-image-generic-lpae-lts-xenial, linux-image-powerpc64-smp-lts-wily, linux-image-powerpc64-emb-lts-wily, linux-image-lowlatency-lts-utopic, linux-image-powerpc64-smp-lts-vivid, linux-image-lowlatency-lts-wily, linux-image-generic-lpae, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc64-smp-lts-utopic, linux-image-generic-64k, linux-image-4.4.0-200-generic-lpae, linux-image-generic-lts-utopic, linux-image-powerpc-smp-lts-wily, linux-image-virtual-lts-utopic, linux-image-generic-lpae-hwe-18.04, linux-image-4.15.0-132-generic-lpae, linux-image-powerpc-smp-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux-image-5.4.0-62-generic-lpae, linux-hwe-5.4, linux-image-4.15.0-132-lowlatency, linux-image-oem-osp1, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-200-generic, linux-image-virtual-hwe-18.04-edge, linux-image-4.4.0-200-powerpc64-smp, linux-image-generic-lts-vivid, linux-image-generic-64k-hwe-20.04-edge, linux-image-5.8.0-38-generic-64k, linux-image-lowlatency-hwe-20.04, linux-image-generic-lpae-lts-utopic, linux-image-4.4.0-200-powerpc64-emb, linux-image-virtual-hwe-18.04, linux-image-virtual-hwe-16.04, linux-image-powerpc64-emb, linux-image-generic-lts-xenial, linux-image-lowlatency-hwe-18.04, linux-image-lowlatency, linux-image-4.4.0-200-powerpc-smp, linux-image-generic-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04-edge, linux-image-virtual-hwe-20.04, linux-image-oem, linux-image-generic-lpae-hwe-18.04-edge, linux-image-virtual-lts-xenial, linux-image-generic-hwe-18.04, linux-image-virtual-lts-wily, linux-image-virtual-hwe-20.04-edge, linux-hwe-5.8, linux-image-generic-lpae-lts-vivid, linux-image-5.4.0-62-lowlatency, linux-image-snapdragon-hwe-18.04, linux-image-5.8.0-38-generic, linux-image-generic-lpae-hwe-20.04-edge, linux-image-4.4.0-200-lowlatency, linux-image-generic-hwe-20.04-edge, linux-lts-xenial, linux-image-4.4.0-200-powerpc-e500mc, linux-image-powerpc-smp-lts-xenial, linux-image-virtual-hwe-16.04-edge, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc64-smp, linux-hwe, linux-image-generic-lpae-hwe-16.04, linux-image-generic-lts-wily, linux, linux-image-generic-hwe-18.04-edge, linux-image-generic-64k-hwe-20.04, linux-image-powerpc64-smp-lts-xenial, linux-image-lowlatency-lts-vivid, linux-image-powerpc-smp, linux-image-virtual-lts-vivid, linux-image-5.8.0-38-generic-lpae
  • USN-4883-1: linux-image-4.15.0-1096-aws, linux-image-4.4.0-206-powerpc-smp, linux-image-powerpc-e500mc, linux-image-4.4.0-206-lowlatency, linux-image-lowlatency-lts-xenial, linux-image-virtual, linux-image-powerpc-e500mc-lts-wily, linux-azure-4.15, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc-e500mc-lts-vivid, linux-aws, linux-image-generic-hwe-16.04, linux-image-generic-lpae-lts-wily, linux-image-powerpc-e500mc-lts-xenial, linux-image-gcp-lts-18.04, linux-image-4.4.0-206-powerpc64-smp, linux-image-generic, linux-image-gke, linux-image-lowlatency-hwe-16.04, linux-image-gcp, linux-image-generic-lpae-hwe-16.04-edge, linux-image-generic-lpae-lts-xenial, linux-image-raspi2, linux-image-kvm, linux-image-powerpc64-smp-lts-wily, linux-image-lowlatency-lts-utopic, linux-image-powerpc64-emb-lts-wily, linux-image-powerpc64-smp-lts-vivid, linux-image-lowlatency-lts-wily, linux-image-generic-lpae, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc64-smp-lts-utopic, linux-image-4.4.0-206-generic, linux-image-generic-lts-utopic, linux-image-powerpc-smp-lts-wily, linux-image-virtual-lts-utopic, linux-gcp-4.15, linux-azure, linux-image-powerpc-smp-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux-image-4.15.0-1110-azure, linux-image-azure, linux-image-powerpc64-emb-lts-xenial, linux-image-4.4.0-206-powerpc64-emb, linux-oracle, linux-kvm, linux-image-generic-lts-vivid, linux-image-4.15.0-1098-snapdragon, linux-image-generic-lpae-lts-utopic, linux-image-oracle-lts-18.04, linux-image-4.15.0-1067-oracle, linux-image-virtual-hwe-16.04, linux-image-powerpc64-emb, linux-snapdragon, linux-image-generic-lts-xenial, linux-image-lowlatency, linux-image-4.15.0-139-lowlatency, linux-image-generic-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04-edge, linux-image-snapdragon, linux-image-oem, linux-image-4.4.0-1088-aws, linux-image-virtual-lts-xenial, linux-image-virtual-lts-wily, linux-image-generic-lpae-lts-vivid, linux-image-4.15.0-139-generic, linux-image-4.4.0-1124-aws, linux-image-4.4.0-206-generic-lpae, linux-aws-hwe, linux-image-4.15.0-1087-kvm, linux-image-aws-lts-18.04, linux-image-azure-edge, linux-image-powerpc-smp-lts-xenial, linux-image-virtual-hwe-16.04-edge, linux-image-oracle, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc64-smp, linux-hwe, linux-image-4.15.0-1081-raspi2, linux-image-4.4.0-1148-raspi2, linux-image-4.4.0-206-powerpc-e500mc, linux-image-generic-lpae-hwe-16.04, linux-image-aws-hwe, linux-image-4.15.0-139-generic-lpae, linux-image-generic-lts-wily, linux-image-4.15.0-1095-gcp, linux, linux-raspi2, linux-image-azure-lts-18.04, linux-image-4.4.0-1152-snapdragon, linux-image-aws, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-1090-kvm, linux-image-lowlatency-lts-vivid, linux-image-powerpc-smp, linux-image-virtual-lts-vivid, linux-gcp
  • LSN-0074-1: oem, azure, generic-5.4, gcp, aws, lowlatency-4.15, generic-4.15, lowlatency-5.4, gkeop-5.4, lowlatency-4.4, aws-fips, gkeop, fips, gke, azure-fips, generic-4.4
  • USN-4709-1: linux-kvm, linux-raspi2, linux-image-snapdragon, linux-image-4.4.0-1149-snapdragon, linux-image-4.4.0-1145-raspi2, linux-aws, linux-image-raspi2, linux-image-kvm, linux-snapdragon, linux-image-4.4.0-1087-kvm, linux-image-4.4.0-1121-aws, linux-image-4.4.0-1085-aws, linux-image-aws
  • USN-4713-1: linux-oracle, linux-image-5.4.0-1028-raspi, linux-image-raspi-hwe-18.04-edge, linux-kvm, linux-gcp-5.4, linux-image-azure-edge, linux-image-5.4.0-1009-gkeop, linux-image-5.8.0-1013-raspi, linux-image-oracle, linux-image-5.4.0-1032-kvm, linux-azure-5.4, linux-image-raspi2-hwe-18.04, linux-image-5.8.0-1021-aws, linux-image-aws-edge, linux-aws-5.4, linux-image-5.4.0-1036-gcp, linux-aws, linux-image-raspi, linux-raspi-5.4, linux-image-5.4.0-1035-gke, linux-image-raspi2-hwe-18.04-edge, linux-azure, linux-image-gke-5.4, linux-image-gke, linux-image-gcp-edge, linux-image-oracle-edge, linux-image-gkeop-5.4, linux-raspi, linux-image-5.4.0-1037-aws, linux-image-gcp, linux-image-5.8.0-1018-oracle, linux-image-raspi-hwe-18.04, linux-image-aws, linux-gke-5.4, linux-image-5.4.0-1037-oracle, linux-image-5.8.0-1016-kvm, linux-gkeop-5.4, linux-image-raspi-nolpae, linux-image-5.8.0-1020-azure, linux-oracle-5.4, linux-image-raspi2, linux-image-5.4.0-1039-azure, linux-image-azure, linux-image-kvm, linux-gcp, linux-image-5.8.0-1020-gcp, linux-image-5.8.0-1013-raspi-nolpae
  • USN-4713-2: linux-image-3.13.0-184-generic-lpae, linux-image-omap, linux-image-powerpc-e500mc, linux-image-3.13.0-184-generic, linux-image-5.3.0-70-lowlatency, linux-image-3.13.0-184-powerpc-smp, linux-gke-5.0, linux-image-powerpc64-smp, linux-hwe, linux-image-5.0.0-1051-gke, linux-image-generic-lpae, linux-image-generic-pae, linux-image-3.13.0-184-lowlatency, linux-image-generic-lts-raring, linux-image-3.13.0-184-powerpc-e500mc, linux-image-virtual, linux-image-raspi2-hwe-18.04, linux-image-gke-5.0, linux-image-gkeop-5.3, linux-image-powerpc64-emb, linux-image-generic-lpae-lts-saucy, linux-image-generic-lpae-lts-trusty, linux-image-lowlatency, linux-image-generic, linux, linux-image-powerpc-e500, linux-image-lowlatency-pae, linux-image-5.3.0-70-generic, linux-image-highbank, linux-image-generic-lts-saucy, linux-image-generic-lts-trusty, linux-image-gke-5.3, linux-gke-5.3, linux-image-5.3.0-1040-gke, linux-image-server, linux-image-3.13.0-184-powerpc64-smp, linux-image-3.13.0-184-powerpc-e500, linux-image-powerpc-smp, linux-image-3.13.0-184-powerpc64-emb, linux-image-generic-lts-quantal, linux-raspi2-5.3, linux-image-5.3.0-1037-raspi2
  • USN-4753-1: linux-image-oem-20.04b, linux-image-oem-20.04-edge, linux-oem-5.10, linux-image-5.10.0-1014-oem
  • USN-4711-1: linux-oracle, linux-kvm, linux-image-aws-lts-18.04, linux-image-azure-edge, linux-image-gke-4.15, linux-image-oracle, linux-image-4.15.0-1095-snapdragon, linux-azure-4.15, linux-image-aws-hwe, linux-image-4.15.0-1064-oracle, linux-image-oracle-lts-18.04, linux-aws, linux-aws-hwe, linux-snapdragon, linux-image-gcp-lts-18.04, linux-gcp-4.15, linux-azure, linux-image-4.15.0-1092-gcp, linux-raspi2, linux-image-4.15.0-1093-aws, linux-image-gke, linux-image-snapdragon, linux-image-azure-lts-18.04, linux-image-gcp, linux-image-4.15.0-1078-gke, linux-image-4.15.0-1106-azure, linux-gke-4.15, linux-image-raspi2, linux-image-4.15.0-1084-kvm, linux-image-azure, linux-image-kvm, linux-image-4.15.0-1078-raspi2, linux-gcp
  • USN-4887-1: linux-image-raspi-hwe-18.04-edge, linux-image-5.8.0-1024-oracle, linux-image-lowlatency-hwe-20.04-edge, linux-gkeop, linux-image-5.3.0-72-generic, linux-image-virtual, linux-image-raspi2-hwe-18.04, linux-image-snapdragon-hwe-18.04-edge, linux-aws, linux-image-5.4.0-1032-raspi, linux-image-generic, linux-image-gke, linux-oem-5.6, linux-image-oem-20.04, linux-image-lowlatency-hwe-18.04-edge, linux-image-gcp, linux-image-generic-lpae-hwe-20.04, linux-image-generic-hwe-20.04, linux-gke-5.3, linux-image-raspi-nolpae, linux-image-5.10.0-1019-oem, linux-image-raspi2, linux-image-kvm, linux-oem-5.10, linux-image-5.4.0-1041-aws, linux-gcp-5.4, linux-image-5.3.0-1041-gke, linux-image-generic-lpae, linux-image-generic-64k, linux-image-oem-20.04-edge, linux-image-5.8.0-1022-kvm, linux-image-5.8.0-48-lowlatency, linux-image-generic-lpae-hwe-18.04, linux-image-5.8.0-1026-azure, linux-image-5.3.0-72-lowlatency, linux-azure, linux-image-5.4.0-1040-gcp, linux-image-gcp-edge, linux-image-5.4.0-70-generic, linux-gkeop-5.4, linux-hwe-5.4, linux-image-5.4.0-70-generic-lpae, linux-image-oem-osp1, linux-image-5.4.0-70-lowlatency, linux-image-azure, linux-image-oem-20.04b, linux-oracle-5.4, linux-image-5.4.0-1043-azure, linux-image-virtual-hwe-18.04-edge, linux-oracle, linux-kvm, linux-image-generic-64k-hwe-20.04-edge, linux-image-5.4.0-1039-gke, linux-image-lowlatency-hwe-20.04, linux-image-5.8.0-48-generic-64k, linux-azure-5.4, linux-image-virtual-hwe-18.04, linux-image-aws-edge, linux-image-raspi, linux-image-5.4.0-1036-kvm, linux-image-lowlatency-hwe-18.04, linux-image-lowlatency, linux-image-5.8.0-1019-raspi, linux-image-gkeop, linux-image-raspi2-hwe-18.04-edge, linux-image-virtual-hwe-20.04, linux-image-5.8.0-1027-aws, linux-image-oem, linux-image-generic-lpae-hwe-18.04-edge, linux-image-generic-hwe-18.04, linux-image-5.8.0-1019-raspi-nolpae, linux-image-virtual-hwe-20.04-edge, linux-hwe-5.8, linux-image-gke-5.3, linux-raspi2-5.3, linux-image-snapdragon-hwe-18.04, linux-image-generic-lpae-hwe-20.04-edge, linux-image-generic-hwe-20.04-edge, linux-image-5.3.0-1038-raspi2, linux-image-azure-edge, linux-image-5.4.0-1041-oracle, linux-image-oracle, linux-hwe, linux-image-5.8.0-48-generic-lpae, linux-image-5.6.0-1052-oem, linux-aws-5.4, linux-image-gkeop-5.3, linux-image-gke-5.4, linux, linux-image-5.4.0-1012-gkeop, linux-image-5.8.0-48-generic, linux-image-oracle-edge, linux-image-gkeop-5.4, linux-raspi, linux-image-generic-hwe-18.04-edge, linux-image-raspi-hwe-18.04, linux-image-generic-64k-hwe-20.04, linux-image-aws, linux-gke-5.4, linux-image-5.8.0-1026-gcp, linux-gcp, linux-raspi-5.4