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Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3169-1)

high Nessus Plugin ID 96439

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3169-1 advisory.

 Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment (CS) in certain error cases. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2016-9756)

 Andrey Konovalov discovered that signed integer overflows existed in the setsockopt() system call when handling the SO_SNDBUFFORCE and SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability could use this to cause a denial of service (system crash or memory corruption). (CVE-2016-9793)

 Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-9794)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-3169-1

Plugin Details

Severity: High

ID: 96439

File Name: ubuntu_USN-3169-1.nasl

Version: 3.12

Type: local

Agent: unix

Published: 1/12/2017

Updated: 8/27/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2016-9794

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-59-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-59-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-59-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-59-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-59-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-59-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-59-generic

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/11/2017

Vulnerability Publication Date: 12/28/2016

Exploitable With

Core Impact

Reference Information

CVE: CVE-2016-9756, CVE-2016-9793, CVE-2016-9794

USN: 3169-1