Login
Newsletter
Werbung

Sicherheit: Mehrere Probleme in Linux
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in Linux
ID: USN-4910-1
Distribution: Ubuntu
Plattformen: Ubuntu 20.04 LTS, Ubuntu 20.10
Datum: Mi, 14. April 2021, 06:29
Referenzen: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3178
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3347
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3348
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20268
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20239
Applikationen: Linux

Originalnachricht


--===============8563110811834036051==
Content-Type: multipart/signed; micalg=pgp-sha512;
protocol="application/pgp-signature";
boundary="u/L2/WlOHZg+YGU4"
Content-Disposition: inline


--u/L2/WlOHZg+YGU4
Content-Type: text/plain; charset=utf-8
Content-Disposition: inlin
Content-Transfer-Encoding: quoted-printable

==========================================================================
Ubuntu Security Notice USN-4910-1
April 13, 2021

linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm,
linux-oracle, linux-raspi vulnerabilities
==========================================================================

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

- Ubuntu 20.10
- Ubuntu 20.04 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-hwe-5.8: Linux hardware enablement (HWE) kernel

Details:

Ryota Shiga discovered that the sockopt BPF hooks in the Linux kernel could
allow a user space program to probe for valid kernel addresses. A local
attacker could use this to ease exploitation of another kernel
vulnerability. (CVE-2021-20239)

It was discovered that the BPF verifier in the Linux kernel did not
properly handle signed add32 and sub integer overflows. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2021-20268)

It was discovered that the priority inheritance futex implementation in the
Linux kernel contained a race condition, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2021-3347)

It was discovered that the network block device (nbd) driver in the Linux
kernel contained a use-after-free vulnerability during device setup. A
local attacker with access to the nbd device could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2021-3348)

后匂 discovered that the NFS implementation in the Linux kernel did not
properly prevent access outside of an NFS export that is a subdirectory of
a file system. An attacker could possibly use this to bypass NFS access
restrictions. (CVE-2021-3178)

Update instructions:

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

Ubuntu 20.10:
linux-image-5.8.0-1020-raspi 5.8.0-1020.23
linux-image-5.8.0-1020-raspi-nolpae 5.8.0-1020.23
linux-image-5.8.0-1023-kvm 5.8.0-1023.25
linux-image-5.8.0-1025-oracle 5.8.0-1025.26
linux-image-5.8.0-1027-azure 5.8.0-1027.29
linux-image-5.8.0-1027-gcp 5.8.0-1027.28
linux-image-5.8.0-1028-aws 5.8.0-1028.30
linux-image-5.8.0-49-generic 5.8.0-49.55
linux-image-5.8.0-49-generic-64k 5.8.0-49.55
linux-image-5.8.0-49-generic-lpae 5.8.0-49.55
linux-image-5.8.0-49-lowlatency 5.8.0-49.55
linux-image-aws 5.8.0.1028.30
linux-image-azure 5.8.0.1027.27
linux-image-gcp 5.8.0.1027.27
linux-image-generic 5.8.0.49.54
linux-image-generic-64k 5.8.0.49.54
linux-image-generic-lpae 5.8.0.49.54
linux-image-gke 5.8.0.1027.27
linux-image-kvm 5.8.0.1023.25
linux-image-lowlatency 5.8.0.49.54
linux-image-oem-20.04 5.8.0.49.54
linux-image-oracle 5.8.0.1025.24
linux-image-raspi 5.8.0.1020.23
linux-image-raspi-nolpae 5.8.0.1020.23
linux-image-virtual 5.8.0.49.54

Ubuntu 20.04 LTS:
linux-image-5.8.0-49-generic 5.8.0-49.55~20.04.1
linux-image-5.8.0-49-generic-64k 5.8.0-49.55~20.04.1
linux-image-5.8.0-49-generic-lpae 5.8.0-49.55~20.04.1
linux-image-5.8.0-49-lowlatency 5.8.0-49.55~20.04.1
linux-image-generic-64k-hwe-20.04 5.8.0.49.55~20.04.33
linux-image-generic-hwe-20.04 5.8.0.49.55~20.04.33
linux-image-generic-lpae-hwe-20.04 5.8.0.49.55~20.04.33
linux-image-lowlatency-hwe-20.04 5.8.0.49.55~20.04.33
linux-image-virtual-hwe-20.04 5.8.0.49.55~20.04.33

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-4910-1
CVE-2021-20239, CVE-2021-20268, CVE-2021-3178, CVE-2021-3347,
CVE-2021-3348

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.8.0-49.55
https://launchpad.net/ubuntu/+source/linux-aws/5.8.0-1028.30
https://launchpad.net/ubuntu/+source/linux-azure/5.8.0-1027.29
https://launchpad.net/ubuntu/+source/linux-gcp/5.8.0-1027.28
https://launchpad.net/ubuntu/+source/linux-kvm/5.8.0-1023.25
https://launchpad.net/ubuntu/+source/linux-oracle/5.8.0-1025.26
https://launchpad.net/ubuntu/+source/linux-raspi/5.8.0-1020.23
https://launchpad.net/ubuntu/+source/linux-hwe-5.8/5.8.0-49.55~20.04.1


--u/L2/WlOHZg+YGU4
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
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=PqPQ
-----END PGP SIGNATURE-----

--u/L2/WlOHZg+YGU4--


--===============8563110811834036051==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

LS0gCnVidW50dS1zZWN1cml0eS1hbm5vdW5jZSBtYWlsaW5nIGxpc3QKdWJ1bnR1LXNlY3VyaXR5
LWFubm91bmNlQGxpc3RzLnVidW50dS5jb20KTW9kaWZ5IHNldHRpbmdzIG9yIHVuc3Vic2NyaWJl
IGF0OiBodHRwczovL2xpc3RzLnVidW50dS5jb20vbWFpbG1hbi9saXN0aW5mby91YnVudHUtc2Vj
dXJpdHktYW5ub3VuY2UK

--===============8563110811834036051==--
Pro-Linux
Pro-Linux @Facebook
Neue Nachrichten
Werbung