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Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2420-1)

medium Nessus Plugin ID 79435

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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-2420-1 advisory.

 A flaw was discovered in how the Linux kernel's KVM (Kernel Virtual Machine) subsystem handles the CR4 control register at VM entry on Intel processors. A local host OS user can exploit this to cause a denial of service (kill arbitrary processes, or system disruption) by leveraging /dev/kvm access. (CVE-2014-3690)

 Don Bailey discovered a flaw in the LZO decompress algorithm used by the Linux kernel. An attacker could exploit this flaw to cause a denial of service (memory corruption or OOPS). (CVE-2014-4608)

 Andy Lutomirski discovered a flaw in how the Linux kernel handles pivot_root when used with a chroot directory. A local user could exploit this flaw to cause a denial of service (mount-tree loop).
 (CVE-2014-7970)

 Andy Lutomirski discovered that the Linux kernel was not checking the CAP_SYS_ADMIN when remounting filesystems to read-only. A local user could exploit this flaw to cause a denial of service (loss of writability). (CVE-2014-7975)

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-2420-1

Plugin Details

Severity: Medium

ID: 79435

File Name: ubuntu_USN-2420-1.nasl

Version: 1.21

Type: local

Agent: unix

Published: 11/25/2014

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: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2014-4608

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

CVSS Score Source: CVE-2014-7975

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-40-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-40-powerpc-smp, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-40-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-40-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-40-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-40-powerpc-e500, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-40-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-40-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: 11/24/2014

Vulnerability Publication Date: 7/3/2014

Reference Information

CVE: CVE-2014-3690, CVE-2014-4608, CVE-2014-7970, CVE-2014-7975

BID: 68214, 70314, 70319, 70691

USN: 2420-1