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AUSCERT External Security Bulletin Redistribution
ESB-2021.1151
USN-4901-1: Linux kernel (Trusty HWE) vulnerabilities
7 April 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Linux kernel (Trusty HWE)
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-27365 CVE-2021-27364 CVE-2021-27363
CVE-2020-28374
Reference: ESB-2021.1101
ESB-2021.1050
ESB-2021.1002
ESB-2021.0955
ESB-2021.0861
Original Bulletin:
https://ubuntu.com/security/notices/USN-4901-1
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USN-4901-1: Linux kernel (Trusty HWE) vulnerabilities
06 April 2021
Several security issues were fixed in the Linux kernel.
Releases
o Ubuntu 12.04
Packages
o 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
o linux-image-3.13.0-185-generic - 3.13.0-185.236~12.04.1
o linux-image-generic-lts-trusty - 3.13.0.185.170
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.
References
o CVE-2021-27365
o CVE-2021-27363
o CVE-2021-27364
o CVE-2020-28374
Related notices
o USN-4889-1 : linux-image-generic-lts-xenial,
linux-image-4.4.0-206-lowlatency, linux-image-generic-pae,
linux-image-generic, linux-image-lowlatency-lts-xenial,
linux-image-3.13.0-185-lowlatency, linux-image-3.13.0-185-generic,
linux-image-server, linux-image-virtual,
linux-image-4.4.0-206-generic-lpae, linux-image-lowlatency,
linux-image-generic-lpae, linux-image-4.4.0-206-generic, linux,
linux-lts-xenial, linux-image-generic-lpae-lts-xenial,
linux-image-lowlatency-pae, linux-image-3.13.0-185-generic-lpae,
linux-image-virtual-lts-xenial
o USN-4694-1 : linux-image-generic-hwe-18.04, linux-image-generic-lts-xenial,
linux-image-generic-lpae-hwe-16.04, linux-image-5.4.0-62-lowlatency,
linux-image-powerpc64-emb-lts-xenial, linux-image-generic,
linux-image-4.4.0-200-generic, linux-image-lowlatency-lts-xenial,
linux-image-5.8.0-38-generic-64k, linux-image-virtual,
linux-image-virtual-hwe-20.04, linux-image-lowlatency,
linux-image-4.4.0-200-powerpc-e500mc, linux-image-generic-lpae, linux,
linux-lts-xenial, linux-image-5.8.0-38-lowlatency,
linux-image-4.15.0-132-lowlatency, linux-image-generic-hwe-20.04,
linux-image-generic-lpae-lts-xenial, linux-image-powerpc-e500mc-lts-xenial,
linux-image-4.15.0-132-generic-lpae, linux-image-5.4.0-62-generic,
linux-image-generic-hwe-16.04, linux-image-lowlatency-hwe-20.04,
linux-image-powerpc64-emb, linux-hwe-5.4,
linux-image-5.8.0-38-generic-lpae, linux-image-generic-lpae-hwe-20.04,
linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-200-lowlatency,
linux-image-powerpc64-smp-lts-xenial, linux-image-lowlatency-hwe-18.04,
linux-image-oem-osp1, linux-image-5.4.0-62-generic-lpae,
linux-image-5.8.0-38-generic, linux-image-generic-64k,
linux-image-4.15.0-132-generic, linux-image-lowlatency-hwe-16.04,
linux-image-powerpc-e500mc, linux-image-4.4.0-200-generic-lpae,
linux-image-snapdragon-hwe-18.04, linux-hwe-5.8, linux-hwe,
linux-image-4.4.0-200-powerpc-smp, linux-image-powerpc64-smp,
linux-image-generic-lpae-hwe-18.04, linux-image-oem,
linux-image-virtual-hwe-16.04, linux-image-virtual-hwe-18.04,
linux-image-virtual-lts-xenial, linux-image-4.4.0-200-powerpc64-smp,
linux-image-powerpc-smp, linux-image-4.4.0-200-powerpc64-emb
o USN-4883-1 : linux-kvm, linux-image-aws-lts-18.04,
linux-image-4.4.0-206-lowlatency, linux-image-azure-lts-18.04,
linux-image-generic-lpae-hwe-16.04, linux-azure-4.15,
linux-image-4.15.0-139-lowlatency, linux-image-4.4.0-1090-kvm,
linux-image-generic, linux-image-4.4.0-1152-snapdragon, linux-image-azure,
linux-image-snapdragon, linux-image-4.4.0-1148-raspi2,
linux-image-4.4.0-1088-aws, linux-image-aws-hwe, linux-image-gcp-lts-18.04,
linux-image-4.4.0-206-powerpc-smp, linux-aws-hwe, linux-image-virtual,
linux-image-4.4.0-206-generic-lpae, linux-image-gke, linux-snapdragon,
linux-image-lowlatency, linux-image-4.15.0-1098-snapdragon,
linux-image-aws, linux-image-4.15.0-1087-kvm,
linux-image-4.4.0-206-generic, linux-image-generic-lpae, linux-image-kvm,
linux, linux-image-azure-edge, linux-image-4.15.0-1096-aws,
linux-image-oracle, linux-image-generic-hwe-16.04,
linux-image-powerpc64-emb, linux-image-4.4.0-206-powerpc64-smp,
linux-image-4.15.0-1081-raspi2, linux-image-4.4.0-206-powerpc64-emb,
linux-image-4.15.0-139-generic, linux-image-gcp, linux-raspi2,
linux-image-4.4.0-206-powerpc-e500mc, linux-image-4.15.0-1095-gcp,
linux-gcp, linux-image-lowlatency-hwe-16.04, linux-image-powerpc-e500mc,
linux-aws, linux-image-4.15.0-1110-azure, linux-image-raspi2, linux-azure,
linux-image-4.4.0-1124-aws, linux-hwe, linux-image-4.15.0-1067-oracle,
linux-gcp-4.15, linux-image-4.15.0-139-generic-lpae, linux-image-oem,
linux-image-oracle-lts-18.04, linux-image-powerpc64-smp,
linux-image-virtual-hwe-16.04, linux-image-powerpc-smp, linux-oracle
o USN-4709-1 : linux-kvm, linux-image-4.4.0-1087-kvm, linux-aws,
linux-image-raspi2, linux-image-4.4.0-1121-aws, linux-image-4.4.0-1085-aws,
linux-snapdragon, linux-image-snapdragon,
linux-image-4.4.0-1149-snapdragon, linux-image-aws, linux-image-kvm,
linux-raspi2, linux-image-4.4.0-1145-raspi2
o USN-4713-1 : linux-gkeop-5.4, linux-image-5.4.0-1036-gcp,
linux-image-5.8.0-1020-gcp, linux-kvm, linux-image-5.8.0-1013-raspi,
linux-image-5.8.0-1013-raspi-nolpae, linux-image-5.4.0-1037-oracle,
linux-image-raspi-nolpae, linux-image-azure, linux-image-raspi-hwe-18.04,
linux-image-5.4.0-1028-raspi, linux-raspi-5.4, linux-image-5.4.0-1037-aws,
linux-azure-5.4, linux-image-5.4.0-1035-gke, linux-image-gke,
linux-image-5.4.0-1032-kvm, linux-image-aws, linux-image-kvm,
linux-image-5.8.0-1016-kvm, linux-gke-5.4, linux-image-5.4.0-1009-gkeop,
linux-image-oracle, linux-aws-5.4, linux-image-5.8.0-1020-azure,
linux-image-gkeop-5.4, linux-gcp-5.4, linux-image-gcp, linux-image-raspi,
linux-gcp, linux-image-5.4.0-1039-azure, linux-aws, linux-image-raspi2,
linux-azure, linux-image-5.8.0-1021-aws, linux-raspi,
linux-image-5.8.0-1018-oracle, linux-image-gke-5.4, linux-oracle-5.4,
linux-oracle
o USN-4713-2 : linux-gke-5.3, linux-image-gke-5.0, linux-image-generic-pae,
linux-image-gke-5.3, linux-image-raspi2-hwe-18.04, linux-image-generic,
linux-image-5.3.0-1040-gke, linux-image-server, linux-image-virtual,
linux-image-3.13.0-184-powerpc-smp, linux-image-3.13.0-184-generic-lpae,
linux-image-5.3.0-70-generic, linux-image-3.13.0-184-powerpc-e500,
linux-image-5.3.0-1037-raspi2, linux-image-5.3.0-70-lowlatency,
linux-image-lowlatency, linux-image-generic-lpae,
linux-image-3.13.0-184-lowlatency, linux,
linux-image-3.13.0-184-powerpc64-emb, linux-image-3.13.0-184-generic,
linux-image-5.0.0-1051-gke, linux-image-3.13.0-184-powerpc-e500mc,
linux-image-powerpc64-emb, linux-image-lowlatency-pae,
linux-image-powerpc-e500, linux-image-3.13.0-184-powerpc64-smp,
linux-raspi2-5.3, linux-image-gkeop-5.3, linux-image-highbank,
linux-image-powerpc-e500mc, linux-hwe, linux-image-powerpc64-smp,
linux-gke-5.0, linux-image-omap, linux-image-powerpc-smp
o USN-4753-1 : linux-image-5.10.0-1014-oem, linux-image-oem-20.04b,
linux-oem-5.10
o USN-4711-1 : linux-kvm, linux-image-aws-lts-18.04,
linux-image-4.15.0-1078-gke, linux-image-azure-lts-18.04, linux-azure-4.15,
linux-image-4.15.0-1084-kvm, linux-image-azure, linux-image-snapdragon,
linux-image-aws-hwe, linux-image-gcp-lts-18.04, linux-aws-hwe,
linux-image-gke, linux-snapdragon, linux-image-4.15.0-1093-aws,
linux-image-kvm, linux-image-oracle, linux-image-4.15.0-1064-oracle,
linux-image-4.15.0-1078-raspi2, linux-image-4.15.0-1092-gcp,
linux-image-4.15.0-1106-azure, linux-image-gcp, linux-image-gke-4.15,
linux-oracle, linux-raspi2, linux-gcp, linux-aws, linux-image-raspi2,
linux-azure, linux-gke-4.15, linux-gcp-4.15, linux-image-oracle-lts-18.04,
linux-image-4.15.0-1095-snapdragon
o USN-4887-1 : linux-gke-5.3, linux-gkeop-5.4, linux-image-5.4.0-1041-aws,
linux-image-5.3.0-1038-raspi2, linux-image-raspi-nolpae,
linux-image-5.4.0-1043-azure, linux-image-5.4.0-70-lowlatency,
linux-image-azure, linux-image-5.4.0-1012-gkeop,
linux-image-raspi-hwe-18.04, linux-image-gke,
linux-image-5.3.0-72-lowlatency, linux-image-5.6.0-1052-oem,
linux-image-kvm, linux-image-5.8.0-1022-kvm, linux,
linux-image-generic-hwe-20.04, linux-image-gkeop-5.4, linux-hwe-5.4,
linux-image-5.3.0-72-generic, linux-image-5.8.0-48-lowlatency,
linux-image-5.4.0-1041-oracle, linux-image-raspi2,
linux-image-5.8.0-1027-aws, linux-image-5.4.0-1040-gcp, linux-oracle-5.4,
linux-image-raspi2-hwe-18.04, linux-image-generic-hwe-18.04,
linux-image-generic-64k-hwe-20.04, linux-raspi-5.4, linux-image-virtual,
linux-azure-5.4, linux-image-5.4.0-70-generic, linux-image-5.4.0-1036-kvm,
linux-image-aws, linux-oem-5.6, linux-gkeop,
linux-image-5.4.0-70-generic-lpae, linux-image-generic-lpae-hwe-20.04,
linux-image-5.8.0-1026-azure, linux-image-raspi,
linux-image-lowlatency-hwe-18.04, linux-azure, linux-raspi,
linux-image-oem, linux-image-virtual-hwe-18.04, linux-image-gke-5.4,
linux-image-5.4.0-1032-raspi, linux-image-virtual-hwe-20.04, linux-oracle,
linux-image-generic, linux-image-5.8.0-48-generic-lpae,
linux-image-5.10.0-1019-oem, linux-image-generic-lpae, linux-gke-5.4,
linux-image-5.4.0-1039-gke, linux-image-oracle,
linux-image-lowlatency-hwe-20.04, linux-image-gkeop, linux-image-oem-osp1,
linux-image-gkeop-5.3, linux-gcp, linux-hwe, linux-kvm,
linux-image-gke-5.3, linux-image-5.8.0-48-generic-64k,
linux-image-5.8.0-1026-gcp, linux-oem-5.10, linux-image-5.8.0-1024-oracle,
linux-image-lowlatency, linux-image-5.8.0-1019-raspi-nolpae, linux-aws-5.4,
linux-image-5.3.0-1041-gke, linux-gcp-5.4, linux-image-gcp,
linux-raspi2-5.3, linux-image-5.8.0-1019-raspi, linux-image-generic-64k,
linux-image-snapdragon-hwe-18.04, linux-image-5.8.0-48-generic, linux-aws,
linux-hwe-5.8, linux-image-oem-20.04, linux-image-generic-lpae-hwe-18.04,
linux-image-oem-20.04b
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