[USN-3777-1] Linux kernel vulnerabilities

Severity High

Affected Packages 11

CVEs 7

Several security issues were fixed in the Linux kernel.

Jann Horn discovered that the vmacache subsystem did not properly handle
sequence number overflows, leading to a use-after-free vulnerability. A
local attacker could use this to cause a denial of service (system crash)
or execute arbitrary code. (CVE-2018-17182)

It was discovered that the paravirtualization implementation in the Linux
kernel did not properly handle some indirect calls, reducing the
effectiveness of Spectre v2 mitigations for paravirtual guests. A local
attacker could use this to expose sensitive information. (CVE-2018-15594)

It was discovered that microprocessors utilizing speculative execution and
prediction of return addresses via Return Stack Buffer (RSB) may allow
unauthorized memory reads via sidechannel attacks. An attacker could use
this to expose sensitive information. (CVE-2018-15572)

Andy Lutomirski and Mika Penttilä discovered that the KVM implementation
in the Linux kernel did not properly check privilege levels when emulating
some instructions. An unprivileged attacker in a guest VM could use this to
escalate privileges within the guest. (CVE-2018-10853)

It was discovered that a stack-based buffer overflow existed in the iSCSI
target implementation of the Linux kernel. A remote attacker could use this
to cause a denial of service (system crash). (CVE-2018-14633)

It was discovered that a memory leak existed in the IRDA subsystem of the
Linux kernel. A local attacker could use this to cause a denial of service
(kernel memory exhaustion). (CVE-2018-6554)

It was discovered that a use-after-free vulnerability existed in the IRDA
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-6555)

USN 3652-1 added a mitigation for Speculative Store Bypass
a.k.a. Spectre Variant 4 (CVE-2018-3639). This update provides the
corresponding mitigation for ARM64 processors. Please note that for
this mitigation to be effective, an updated firmware for the processor
may be required.

Package	Affected Version
pkg:deb/ubuntu/linux-image-unsigned-4.15.0-36-lowlatency?distro=bionic	< 4.15.0-36.39
pkg:deb/ubuntu/linux-image-unsigned-4.15.0-36-generic?distro=bionic	< 4.15.0-36.39
pkg:deb/ubuntu/linux-image-unsigned-4.15.0-1021-oem?distro=bionic	< 4.15.0-1021.24
pkg:deb/ubuntu/linux-image-unsigned-4.15.0-1021-gcp?distro=bionic	< 4.15.0-1021.22
pkg:deb/ubuntu/linux-image-4.15.0-36-snapdragon?distro=bionic	< 4.15.0-36.39
pkg:deb/ubuntu/linux-image-4.15.0-36-lowlatency?distro=bionic	< 4.15.0-36.39
pkg:deb/ubuntu/linux-image-4.15.0-36-generic?distro=bionic	< 4.15.0-36.39
pkg:deb/ubuntu/linux-image-4.15.0-36-generic-lpae?distro=bionic	< 4.15.0-36.39
pkg:deb/ubuntu/linux-image-4.15.0-1024-raspi2?distro=bionic	< 4.15.0-1024.26
pkg:deb/ubuntu/linux-image-4.15.0-1023-kvm?distro=bionic	< 4.15.0-1023.23
pkg:deb/ubuntu/linux-image-4.15.0-1023-aws?distro=bionic	< 4.15.0-1023.23

ID

USN-3777-1

Severity

high

URL

https://ubuntu.com/security/notices/USN-3777-1

Published

2018-10-01T19:15:42
(6 years ago)

Modified

2018-10-01T19:15:42
(6 years ago)

Other Advisories

Type	Package URL	Namespace	Name / Product	Version	Distribution / Platform
Affected	pkg:deb/ubuntu/linux-image-unsigned-4.15.0-36-lowlatency?distro=bionic	ubuntu	linux-image-unsigned-4.15.0-36-lowlatency	< 4.15.0-36.39	bionic
Affected	pkg:deb/ubuntu/linux-image-unsigned-4.15.0-36-generic?distro=bionic	ubuntu	linux-image-unsigned-4.15.0-36-generic	< 4.15.0-36.39	bionic
Affected	pkg:deb/ubuntu/linux-image-unsigned-4.15.0-1021-oem?distro=bionic	ubuntu	linux-image-unsigned-4.15.0-1021-oem	< 4.15.0-1021.24	bionic
Affected	pkg:deb/ubuntu/linux-image-unsigned-4.15.0-1021-gcp?distro=bionic	ubuntu	linux-image-unsigned-4.15.0-1021-gcp	< 4.15.0-1021.22	bionic
Affected	pkg:deb/ubuntu/linux-image-4.15.0-36-snapdragon?distro=bionic	ubuntu	linux-image-4.15.0-36-snapdragon	< 4.15.0-36.39	bionic
Affected	pkg:deb/ubuntu/linux-image-4.15.0-36-lowlatency?distro=bionic	ubuntu	linux-image-4.15.0-36-lowlatency	< 4.15.0-36.39	bionic
Affected	pkg:deb/ubuntu/linux-image-4.15.0-36-generic?distro=bionic	ubuntu	linux-image-4.15.0-36-generic	< 4.15.0-36.39	bionic
Affected	pkg:deb/ubuntu/linux-image-4.15.0-36-generic-lpae?distro=bionic	ubuntu	linux-image-4.15.0-36-generic-lpae	< 4.15.0-36.39	bionic
Affected	pkg:deb/ubuntu/linux-image-4.15.0-1024-raspi2?distro=bionic	ubuntu	linux-image-4.15.0-1024-raspi2	< 4.15.0-1024.26	bionic
Affected	pkg:deb/ubuntu/linux-image-4.15.0-1023-kvm?distro=bionic	ubuntu	linux-image-4.15.0-1023-kvm	< 4.15.0-1023.23	bionic
Affected	pkg:deb/ubuntu/linux-image-4.15.0-1023-aws?distro=bionic	ubuntu	linux-image-4.15.0-1023-aws	< 4.15.0-1023.23	bionic

# CVE	Description	CVSS	EPSS	EPSS Trend (30 days)	Affected Products	Weaknesses	Security Advisories	Exploits	PoC	Pubblication Date	Modification Date
# CVE	Description	CVSS	EPSS	EPSS Trend (30 days)	Affected Products	Weaknesses	Security Advisories	PoC	Pubblication Date	Modification Date