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Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2907-1)

high Nessus Plugin ID 88895

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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-2907-1 advisory.

 halfdog discovered that OverlayFS, when mounting on top of a FUSE mount, incorrectly propagated file attributes, including setuid. A local unprivileged attacker could use this to gain privileges.
 (CVE-2016-1576)

 halfdog discovered that OverlayFS in the Linux kernel incorrectly propagated security sensitive extended attributes, such as POSIX ACLs. A local unprivileged attacker could use this to gain privileges.
 (CVE-2016-1575)

 It was discovered that the Linux kernel keyring subsystem contained a race between read and revoke operations. A local attacker could use this to cause a denial of service (system crash). (CVE-2015-7550)

 discovered that the Linux kernel networking implementation did not validate protocol identifiers for certain protocol families, A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges. (CVE-2015-8543)

 Dmitry Vyukov discovered that the pptp implementation in the Linux kernel did not verify an address length when setting up a socket. A local attacker could use this to craft an application that exposed sensitive information from kernel memory. (CVE-2015-8569)

 David Miller discovered that the Bluetooth implementation in the Linux kernel did not properly validate the socket address length for Synchronous Connection-Oriented (SCO) sockets. A local attacker could use this to expose sensitive information. (CVE-2015-8575)

 It was discovered that the Linux kernel's Filesystem in Userspace (FUSE) implementation did not handle initial zero length segments properly. A local attacker could use this to cause a denial of service (unkillable task). (CVE-2015-8785)

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-2907-1

Plugin Details

Severity: High

ID: 88895

File Name: ubuntu_USN-2907-1.nasl

Version: 2.16

Type: local

Agent: unix

Published: 2/23/2016

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-2016-1576

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-3.13.0-79-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-79-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-79-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-79-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-79-powerpc-e500, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-79-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-79-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-79-lowlatency

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: 2/22/2016

Vulnerability Publication Date: 12/28/2015

Reference Information

CVE: CVE-2015-7550, CVE-2015-8543, CVE-2015-8569, CVE-2015-8575, CVE-2015-8785, CVE-2016-1575, CVE-2016-1576

USN: 2907-1