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Ubuntu 14.04 LTS : Linux kernel (Wily HWE) vulnerabilities (USN-2908-2)

high Nessus Plugin ID 88898

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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-2908-2 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 did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. (CVE-2013-4312)

 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)

 Andy Lutomirski discovered a race condition in the Linux kernel's translation lookaside buffer (TLB) handling of flush events. A local attacker could use this to cause a denial of service or possibly leak sensitive information. (CVE-2016-2069)

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-2908-2

Plugin Details

Severity: High

ID: 88898

File Name: ubuntu_USN-2908-2.nasl

Version: 2.19

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-4.2.0-30-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-30-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-30-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-30-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-30-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-30-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-30-powerpc-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: 2/22/2016

Vulnerability Publication Date: 2/8/2016

Reference Information

CVE: CVE-2013-4312, CVE-2015-8785, CVE-2016-1575, CVE-2016-1576, CVE-2016-2069

USN: 2908-2