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Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2688-1)

high Nessus Plugin ID 85076

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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-2688-1 advisory.

 Andy Lutomirski discovered a flaw in the Linux kernel's handling of nested NMIs (non-maskable interrupts).
 An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or potentially escalate their privileges. (CVE-2015-3290)

 Colin King discovered a flaw in the add_key function of the Linux kernel's keyring subsystem. A local user could exploit this flaw to cause a denial of service (memory exhaustion). (CVE-2015-1333)

 Andy Lutomirski discovered a flaw that allows user to cause the Linux kernel to ignore some NMIs (non- maskable interrupts). A local unprivileged user could exploit this flaw to potentially cause the system to miss important NMIs resulting in unspecified effects. (CVE-2015-3291)

 Andy Lutomirski and Petr Matousek discovered that an NMI (non-maskable interrupt) that interrupts userspace and encounters an IRET fault is incorrectly handled by the Linux kernel. An unprivileged local user could exploit this flaw to cause a denial of service (kernel OOPs), corruption, or potentially escalate privileges on the system. (CVE-2015-5157)

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-2688-1

Plugin Details

Severity: High

ID: 85076

File Name: ubuntu_USN-2688-1.nasl

Version: 2.13

Type: local

Agent: unix

Published: 7/29/2015

Updated: 8/27/2024

Supported Sensors: Agentless 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-2015-5157

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: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-59-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-59-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-59-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-59-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-59-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-59-powerpc-e500, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-59-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-59-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: 7/28/2015

Vulnerability Publication Date: 8/31/2015

Reference Information

CVE: CVE-2015-1333, CVE-2015-3290, CVE-2015-3291, CVE-2015-5157

USN: 2688-1