Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3084-2)

medium Nessus Plugin ID 93605

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-3084-2 advisory.

- arch/powerpc/kvm/book3s_hv_rmhandlers.S in the Linux kernel through 4.7 on PowerPC platforms, when CONFIG_KVM_BOOK3S_64_HV is enabled, allows guest OS users to cause a denial of service (host OS infinite loop) by making a H_CEDE hypercall during the existence of a suspended transaction. (CVE-2016-5412)

- Race condition in the audit_log_single_execve_arg function in kernel/auditsc.c in the Linux kernel through 4.7 allows local users to bypass intended character-set restrictions or disrupt system-call auditing by changing a certain string, aka a double fetch vulnerability. (CVE-2016-6136)

- Race condition in the ec_device_ioctl_xcmd function in drivers/platform/chrome/cros_ec_dev.c in the Linux kernel before 4.7 allows local users to cause a denial of service (out-of-bounds array access) by changing a certain size value, aka a double fetch vulnerability. (CVE-2016-6156)

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-3084-2

Plugin Details

Severity: Medium

ID: 93605

File Name: ubuntu_USN-3084-2.nasl

Version: 2.14

Type: local

Agent: unix

Published: 9/20/2016

Updated: 1/9/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 1.9

Temporal Score: 1.4

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

CVSS Score Source: CVE-2016-6136

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-38-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-38-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-38-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-38-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-38-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-38-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-38-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:14.04:-:lts

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 9/19/2016

Vulnerability Publication Date: 8/6/2016

Reference Information

CVE: CVE-2016-5412, CVE-2016-6136, CVE-2016-6156

USN: 3084-2