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Test ID:1.3.6.1.4.1.25623.1.0.844464
Category:Ubuntu Local Security Checks
Title:Ubuntu: Security Advisory for linux (USN-4389-1)
Summary:The remote host is missing an update for the 'linux'; package(s) announced via the USN-4389-1 advisory.
Description:Summary:
The remote host is missing an update for the 'linux'
package(s) announced via the USN-4389-1 advisory.

Vulnerability Insight:
It was discovered that the F2FS file system implementation in the Linux
kernel did not properly perform bounds checking on xattrs in some
situations. A local attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2020-0067)

It was discovered that memory contents previously stored in
microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY
read operations on Intel client and Xeon E3 processors may be briefly
exposed to processes on the same or different processor cores. A local
attacker could use this to expose sensitive information. (CVE-2020-0543)

Piotr Krysiuk discovered that race conditions existed in the file system
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2020-12114)

It was discovered that the USB susbsystem's scatter-gather implementation
in the Linux kernel did not properly take data references in some
situations, leading to a use-after-free. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2020-12464)

Bui Quang Minh discovered that the XDP socket implementation in the Linux
kernel did not properly validate meta-data passed from user space, leading
to an out-of-bounds write vulnerability. A local attacker with the
CAP_NET_ADMIN capability could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2020-12659)

Dmitry Vyukov discovered that the SELinux netlink security hook in the
Linux kernel did not validate messages in some situations. A privileged
attacker could use this to bypass SELinux netlink restrictions.
(CVE-2020-10751)

Affected Software/OS:
'linux' package(s) on Ubuntu 20.04 LTS.

Solution:
Please install the updated package(s).

CVSS Score:
7.2

CVSS Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-0067
http://android.googlesource.com/kernel/common/+/688078e7
https://usn.ubuntu.com/4387-1/
https://usn.ubuntu.com/4388-1/
https://usn.ubuntu.com/4389-1/
https://usn.ubuntu.com/4390-1/
https://usn.ubuntu.com/4527-1/
Common Vulnerability Exposure (CVE) ID: CVE-2020-0543
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DT2VKDMQ3I37NBNJ256A2EXR7OJHXXKZ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NQZMOSHLTBBIECENNXA6M7DN5FEED4KI/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T5OUM24ZC43G4IDT3JUCIHJTSDXJSK6Y/
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00320.html
http://www.openwall.com/lists/oss-security/2020/07/14/5
SuSE Security Announcement: openSUSE-SU-2020:0818 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00025.html
SuSE Security Announcement: openSUSE-SU-2020:0965 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html
SuSE Security Announcement: openSUSE-SU-2020:0985 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html
https://usn.ubuntu.com/4385-1/
https://usn.ubuntu.com/4391-1/
https://usn.ubuntu.com/4392-1/
https://usn.ubuntu.com/4393-1/
CopyrightCopyright (C) 2020 Greenbone Networks GmbH

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