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Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3055-1)

high Nessus Plugin ID 92865

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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-3055-1 advisory.

 Ben Hawkes discovered an integer overflow in the Linux netfilter implementation. On systems running 32 bit kernels, a local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3135)

 It was discovered that the keyring implementation in the Linux kernel did not ensure a data structure was initialized before referencing it after an error condition occurred. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-4470)

 Sasha Levin discovered that a use-after-free existed in the percpu allocator in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-4794)

 Kangjie Lu discovered an information leak in the netlink implementation of the Linux kernel. A local attacker could use this to obtain sensitive information from kernel memory. (CVE-2016-5243)

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-3055-1

Plugin Details

Severity: High

ID: 92865

File Name: ubuntu_USN-3055-1.nasl

Version: 2.13

Type: local

Agent: unix

Published: 8/11/2016

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: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2016-4794

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-34-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-34-lowlatency, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-34-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-34-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-34-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-34-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-34-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: 8/10/2016

Vulnerability Publication Date: 4/27/2016

Reference Information

CVE: CVE-2016-3135, CVE-2016-4470, CVE-2016-4794, CVE-2016-5243

USN: 3055-1