Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerability (USN-3249-2)

high Nessus Plugin ID 99097

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 14.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-3249-2 advisory.

- The xfrm_replay_verify_len function in net/xfrm/xfrm_user.c in the Linux kernel through 4.10.6 does not validate certain size data after an XFRM_MSG_NEWAE update, which allows local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux- image-* package 4.8.0.41.52. (CVE-2017-7184)

Note that Nessus has not tested for this issue 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-3249-2

Plugin Details

Severity: High

ID: 99097

File Name: ubuntu_USN-3249-2.nasl

Version: 3.11

Type: local

Agent: unix

Published: 3/30/2017

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: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2017-7184

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-71-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-71-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-71-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-71-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-71-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-71-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-71-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: 3/29/2017

Vulnerability Publication Date: 3/19/2017

Reference Information

CVE: CVE-2017-7184

USN: 3249-2