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Ubuntu 14.04 LTS : Linux kernel (Wily HWE) vulnerabilities (USN-2843-2)

low Nessus Plugin ID 87497

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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-2843-2 advisory.

 Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. (CVE-2015-8104)

 discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). (CVE-2015-7799)

 Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted to garbage collect incompletely instantiated keys. A local unprivileged attacker could use this to cause a denial of service (system crash). (CVE-2015-7872)

 It was discovered that the virtual video osd test driver in the Linux kernel did not properly initialize data structures. A local attacker could use this to obtain sensitive information from the kernel.
 (CVE-2015-7884)

 It was discovered that the driver for Digi Neo and ClassicBoard devices did not properly initialize data structures. A local attacker could use this to obtain sensitive information from the kernel.
 (CVE-2015-7885)

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-2843-2

Plugin Details

Severity: Low

ID: 87497

File Name: ubuntu_USN-2843-2.nasl

Version: 2.16

Type: local

Agent: unix

Published: 12/18/2015

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: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2015-7885

CVSS v3

Risk Factor: Low

Base Score: 2.3

Temporal Score: 2.1

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-21-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-21-generic, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-21-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-21-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-21-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-21-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-21-powerpc64-emb

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: 12/17/2015

Vulnerability Publication Date: 10/19/2015

Reference Information

CVE: CVE-2015-7799, CVE-2015-7872, CVE-2015-7884, CVE-2015-7885, CVE-2015-8104

USN: 2843-2