Sicherheit: Mehrere Probleme in Linux

Lesezeichen hinzufügen

--===============8166577697058210999==
Content-Type: multipart/signed; micalg=pgp-sha512;
protocol="application/pgp-signature";
boundary="GPJrCs/72TxItFYR"
Content-Disposition: inline

--GPJrCs/72TxItFYR
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

==========================================================================
Ubuntu Security Notice USN-4887-1
March 23, 2021

linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp,
linux-gcp-5.4, linux-gke-5.3, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4,
linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-kvm, linux-oem-5.10,
linux-oem-5.6, linux-oracle, linux-oracle-5.4, linux-raspi,
linux-raspi-5.4, linux-raspi2-5.3 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi (V8) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-hwe-5.8: Linux hardware enablement (HWE) kernel
- linux-oem-5.10: Linux kernel for OEM systems
- linux-oem-5.6: Linux kernel for OEM systems
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke-5.3: Linux kernel for Google Container Engine (GKE) systems
- linux-gke-5.4: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop-5.4: Linux kernel for Google Container Engine (GKE) systems
- linux-hwe: Linux hardware enablement (HWE) kernel
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi (V8) systems
- linux-raspi2-5.3: Linux kernel for Raspberry Pi (V8) systems

Details:

De4dCr0w of 360 Alpha Lab discovered that the BPF verifier in the Linux
kernel did not properly handle mod32 destination register truncation when
the source register was known to be 0. A local attacker could use this to
expose sensitive information (kernel memory) or possibly execute arbitrary
code. (CVE-2021-3444)

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)

Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not
properly compute a speculative execution limit on pointer arithmetic in
some situations. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2020-27171)

Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not
properly apply speculative execution limits on some pointer types. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2020-27170)

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 20.10:
linux-image-5.8.0-1019-raspi 5.8.0-1019.22
linux-image-5.8.0-1019-raspi-nolpae 5.8.0-1019.22
linux-image-5.8.0-1022-kvm 5.8.0-1022.24
linux-image-5.8.0-1024-oracle 5.8.0-1024.25
linux-image-5.8.0-1026-azure 5.8.0-1026.28
linux-image-5.8.0-1026-gcp 5.8.0-1026.27
linux-image-5.8.0-1027-aws 5.8.0-1027.29
linux-image-5.8.0-48-generic 5.8.0-48.54
linux-image-5.8.0-48-generic-64k 5.8.0-48.54
linux-image-5.8.0-48-generic-lpae 5.8.0-48.54
linux-image-5.8.0-48-lowlatency 5.8.0-48.54
linux-image-aws 5.8.0.1027.29
linux-image-azure 5.8.0.1026.26
linux-image-gcp 5.8.0.1026.26
linux-image-generic 5.8.0.48.53
linux-image-generic-64k 5.8.0.48.53
linux-image-generic-lpae 5.8.0.48.53
linux-image-gke 5.8.0.1026.26
linux-image-kvm 5.8.0.1022.24
linux-image-lowlatency 5.8.0.48.53
linux-image-oem-20.04 5.8.0.48.53
linux-image-oracle 5.8.0.1024.23
linux-image-raspi 5.8.0.1019.22
linux-image-raspi-nolpae 5.8.0.1019.22
linux-image-virtual 5.8.0.48.53

Ubuntu 20.04 LTS:
linux-image-5.10.0-1019-oem 5.10.0-1019.20
linux-image-5.4.0-1012-gkeop 5.4.0-1012.13
linux-image-5.4.0-1032-raspi 5.4.0-1032.35
linux-image-5.4.0-1036-kvm 5.4.0-1036.37
linux-image-5.4.0-1040-gcp 5.4.0-1040.43
linux-image-5.4.0-1041-aws 5.4.0-1041.43
linux-image-5.4.0-1041-oracle 5.4.0-1041.44
linux-image-5.4.0-1043-azure 5.4.0-1043.45
linux-image-5.4.0-70-generic 5.4.0-70.78
linux-image-5.4.0-70-generic-lpae 5.4.0-70.78
linux-image-5.4.0-70-lowlatency 5.4.0-70.78
linux-image-5.6.0-1052-oem 5.6.0-1052.56
linux-image-5.8.0-48-generic 5.8.0-48.54~20.04.1
linux-image-5.8.0-48-generic-64k 5.8.0-48.54~20.04.1
linux-image-5.8.0-48-generic-lpae 5.8.0-48.54~20.04.1
linux-image-5.8.0-48-lowlatency 5.8.0-48.54~20.04.1
linux-image-aws 5.4.0.1041.42
linux-image-azure 5.4.0.1043.41
linux-image-gcp 5.4.0.1040.49
linux-image-generic 5.4.0.70.73
linux-image-generic-64k-hwe-20.04 5.8.0.48.54~20.04.32
linux-image-generic-hwe-20.04 5.8.0.48.54~20.04.32
linux-image-generic-lpae 5.4.0.70.73
linux-image-generic-lpae-hwe-20.04 5.8.0.48.54~20.04.32
linux-image-gkeop 5.4.0.1012.15
linux-image-gkeop-5.4 5.4.0.1012.15
linux-image-kvm 5.4.0.1036.34
linux-image-lowlatency 5.4.0.70.73
linux-image-lowlatency-hwe-20.04 5.8.0.48.54~20.04.32
linux-image-oem 5.4.0.70.73
linux-image-oem-20.04 5.6.0.1052.48
linux-image-oem-20.04b 5.10.0.1019.20
linux-image-oem-osp1 5.4.0.70.73
linux-image-oracle 5.4.0.1041.38
linux-image-raspi 5.4.0.1032.67
linux-image-raspi2 5.4.0.1032.67
linux-image-virtual 5.4.0.70.73
linux-image-virtual-hwe-20.04 5.8.0.48.54~20.04.32

Ubuntu 18.04 LTS:
linux-image-5.3.0-1038-raspi2 5.3.0-1038.40
linux-image-5.3.0-1041-gke 5.3.0-1041.44
linux-image-5.3.0-72-generic 5.3.0-72.68
linux-image-5.3.0-72-lowlatency 5.3.0-72.68
linux-image-5.4.0-1012-gkeop 5.4.0-1012.13~18.04.1
linux-image-5.4.0-1032-raspi 5.4.0-1032.35~18.04.1
linux-image-5.4.0-1039-gke 5.4.0-1039.41~18.04.1
linux-image-5.4.0-1040-gcp 5.4.0-1040.43~18.04.1
linux-image-5.4.0-1041-aws 5.4.0-1041.43~18.04.1
linux-image-5.4.0-1041-oracle 5.4.0-1041.44~18.04.1
linux-image-5.4.0-1043-azure 5.4.0-1043.45~18.04.1
linux-image-5.4.0-70-generic 5.4.0-70.78~18.04.1
linux-image-5.4.0-70-generic-lpae 5.4.0-70.78~18.04.1
linux-image-5.4.0-70-lowlatency 5.4.0-70.78~18.04.1
linux-image-aws 5.4.0.1041.24
linux-image-azure 5.4.0.1043.23
linux-image-gcp 5.4.0.1040.27
linux-image-generic-hwe-18.04 5.4.0.70.78~18.04.63
linux-image-generic-lpae-hwe-18.04 5.4.0.70.78~18.04.63
linux-image-gke-5.3 5.3.0.1041.24
linux-image-gke-5.4 5.4.0.1039.41~18.04.6
linux-image-gkeop-5.3 5.3.0.72.129
linux-image-gkeop-5.4 5.4.0.1012.13~18.04.13
linux-image-lowlatency-hwe-18.04 5.4.0.70.78~18.04.63
linux-image-oem 5.4.0.70.78~18.04.63
linux-image-oem-osp1 5.4.0.70.78~18.04.63
linux-image-oracle 5.4.0.1041.44~18.04.23
linux-image-raspi-hwe-18.04 5.4.0.1032.34
linux-image-raspi2-hwe-18.04 5.3.0.1038.27
linux-image-snapdragon-hwe-18.04 5.4.0.70.78~18.04.63
linux-image-virtual-hwe-18.04 5.4.0.70.78~18.04.63

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:
https://ubuntu.com/security/notices/USN-4887-1
CVE-2020-27170, CVE-2020-27171, CVE-2021-27363, CVE-2021-27364,
CVE-2021-27365, CVE-2021-3444

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.8.0-48.54
https://launchpad.net/ubuntu/+source/linux-aws/5.8.0-1027.29
https://launchpad.net/ubuntu/+source/linux-azure/5.8.0-1026.28
https://launchpad.net/ubuntu/+source/linux-gcp/5.8.0-1026.27
https://launchpad.net/ubuntu/+source/linux-kvm/5.8.0-1022.24
https://launchpad.net/ubuntu/+source/linux-oracle/5.8.0-1024.25
https://launchpad.net/ubuntu/+source/linux-raspi/5.8.0-1019.22
https://launchpad.net/ubuntu/+source/linux/5.4.0-70.78
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1041.43
https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1043.45
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1040.43
https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1012.13
https://launchpad.net/ubuntu/+source/linux-hwe-5.8/5.8.0-48.54~20.04.1
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1036.37
https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1019.20
https://launchpad.net/ubuntu/+source/linux-oem-5.6/5.6.0-1052.56
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1041.44
https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1032.35
https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1041.43~18.04.1
https://launchpad.net/ubuntu/+source/linux-azure-5.4/5.4.0-1043.45~18.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1040.43~18.04.1
https://launchpad.net/ubuntu/+source/linux-gke-5.3/5.3.0-1041.44
https://launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1039.41~18.04.1
https://launchpad.net/ubuntu/+source/linux-gkeop-5.4/5.4.0-1012.13~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-72.68
https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-70.78~18.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1041.44~18.04.1
https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1032.35~18.04.1
https://launchpad.net/ubuntu/+source/linux-raspi2-5.3/5.3.0-1038.40

--GPJrCs/72TxItFYR
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
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=eFno
-----END PGP SIGNATURE-----

--GPJrCs/72TxItFYR--

--===============8166577697058210999==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

--
ubuntu-security-announce mailing list
ubuntu-security-announce@lists.ubuntu.com
Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce