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Ubuntu 14.04 LTS : Linux kernel (Wily HWE) vulnerabilities (USN-2947-2)

critical Nessus Plugin ID 90403

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Synopsis

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

Description

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2947-2 advisory.

 Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly validate the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7833)

 Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
 (CVE-2015-8812)

 Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. (CVE-2016-2085)

 It was discovered that the extended Berkeley Packet Filter (eBPF) implementation in the Linux kernel did not correctly compute branch offsets for backward jumps after ctx expansion. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2016-2383)

 David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). (CVE-2016-2550)

 It was discovered that the Linux kernel did not enforce limits on the amount of data allocated to buffer pipes. A local attacker could use this to cause a denial of service (resource exhaustion). (CVE-2016-2847)

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-2947-2

Plugin Details

Severity: Critical

ID: 90403

File Name: ubuntu_USN-2947-2.nasl

Version: 2.15

Type: local

Agent: unix

Published: 4/7/2016

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: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2015-8812

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-35-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-35-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-35-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-35-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-35-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-35-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-35-powerpc64-smp

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: 4/6/2016

Vulnerability Publication Date: 10/19/2015

Reference Information

CVE: CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383, CVE-2016-2550, CVE-2016-2847

USN: 2947-2