Ubuntu 16.04 LTS : Linux kernel (Intel Euclid) vulnerability (USN-3633-1) - Nessus

High Plugin ID: 109317

This page contains detailed information about the Ubuntu 16.04 LTS : Linux kernel (Intel Euclid) vulnerability (USN-3633-1) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

hide

Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 109317
Name: Ubuntu 16.04 LTS : Linux kernel (Intel Euclid) vulnerability (USN-3633-1)
Filename: ubuntu_USN-3633-1.nasl
Vulnerability Published: 2017-12-27
This Plugin Published: 2018-04-24
Last Modification Time: 2020-09-17
Plugin Version: 1.11
Plugin Type: local
Plugin Family: Ubuntu Local Security Checks
Dependencies: linux_alt_patch_detect.nasl, ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Vulnerability Information

Severity: High
Vulnerability Published: 2017-12-27
Patch Published: 2018-04-24
CVE [?]: CVE-2017-16995
CPE [?]: cpe:/o:canonical:ubuntu_linux:16.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-euclid, p-cpe:/a:canonical:ubuntu_linux:linux-image-euclid
Exploited by Malware: True

Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected linux-image-4.4-euclid and / or linux-image-euclid packages.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Ubuntu 16.04 LTS : Linux kernel (Intel Euclid) vulnerability (USN-3633-1) vulnerability:

Metasploit: exploit/linux/local/bpf_sign_extension_priv_esc
[Linux BPF Sign Extension Local Privilege Escalation]
Exploit-DB: exploits/linux/local/45010.c
[EDB-45010: Linux Kernel < 4.13.9 (Ubuntu 16.04 / Fedora 27) - Local Privilege Escalation]
Exploit-DB: exploits/linux/local/45058.rb
[EDB-45058: Linux - BPF Sign Extension Local Privilege Escalation (Metasploit)]
GitHub: https://github.com/AfvanMoopen/tryhackme-
[CVE-2017-16995]
GitHub: https://github.com/Al1ex/LinuxEelvation
[CVE-2017-16995]
GitHub: https://github.com/De4dCr0w/Linux-kernel-EoP-exp
[CVE-2017-16995]
GitHub: https://github.com/Dk0n9/linux_exploit
[CVE-2017-16995]
GitHub: https://github.com/Getshell/LinuxTQ
[CVE-2017-16995]
GitHub: https://github.com/Jean-Francois-C/Boot2root-CTFs-Writeups
[CVE-2017-16995]
GitHub: https://github.com/Lumindu/CVE-2017-16995-Linux-Kernel---BPF-Sign-Extension-Local-Privilege-Escalation-
[CVE-2017-16995]
GitHub: https://github.com/Metarget/metarget
[CVE-2017-16995]
GitHub: https://github.com/R0B1NL1N/Linux-Kernal-Exploits-m-
[CVE-2017-16995]
GitHub: https://github.com/SexyBeast233/SecBooks
[CVE-2017-16995]
GitHub: https://github.com/Snoopy-Sec/Localroot-ALL-CVE
[CVE-2017-16995]
GitHub: https://github.com/Technoashofficial/kernel-exploitation-linux
[CVE-2017-16995]
GitHub: https://github.com/WireFisher/LearningFromCVE
[CVE-2017-16995]
GitHub: https://github.com/anoaghost/Localroot_Compile
[CVE-2017-16995]
GitHub: https://github.com/bsauce/kernel-exploit-factory
[CVE-2017-16995]
GitHub: https://github.com/bsauce/kernel-security-learning
[CVE-2017-16995]
GitHub: https://github.com/catsecorg/CatSec-TryHackMe-WriteUps
[CVE-2017-16995]
GitHub: https://github.com/dangokyo/CVE_2017_16995
[CVE-2017-16995]
GitHub: https://github.com/fengjixuchui/RedTeamer
[CVE-2017-16995]
GitHub: https://github.com/gugronnier/CVE-2017-16995
[CVE-2017-16995: Exploit adapted for a specific PoC on Ubuntu 16.04.01]
GitHub: https://github.com/holmes-py/King-of-the-hill
[CVE-2017-16995]
GitHub: https://github.com/integeruser/on-pwning
[CVE-2017-16995]
GitHub: https://github.com/jas502n/Ubuntu-0day
[CVE-2017-16995]
GitHub: https://github.com/likescam/Ubuntu-0day-2017
[CVE-2017-16995]
GitHub: https://github.com/littlebin404/CVE-2017-16995
[CVE-2017-16995: CVE-2017-16995 ubuntun本地提权 POC]
GitHub: https://github.com/mzet-/linux-exploit-suggester
[CVE-2017-16995]
GitHub: https://github.com/ph4ntonn/CVE-2017-16995
[CVE-2017-16995: 👻CVE-2017-16995]
GitHub: https://github.com/qazbnm456/awesome-cve-poc/blob/master/CVE-2017-16995.md
[CVE-2017-16995]
GitHub: https://github.com/qiantu88/Linux--exp
[CVE-2017-16995]
GitHub: https://github.com/rakjong/LinuxElevation
[CVE-2017-16995]
GitHub: https://github.com/ret2p4nda/kernel-pwn
[CVE-2017-16995]
GitHub: https://github.com/rootclay/Ubuntu-16.04-0Day
[CVE-2017-16995]
GitHub: https://github.com/senyuuri/cve-2017-16995
[CVE-2017-16995: Writeup for CVE-2017-16995 Linux BPF Local Privilege Escalation]
GitHub: https://github.com/thelostvoice/global-takeover
[CVE-2017-16995]
GitHub: https://github.com/thelostvoice/inept-us-military
[CVE-2017-16995]
GitHub: https://github.com/vnik5287/CVE-2017-16995
[CVE-2017-16995: CVE-2017-16995 eBPF PoC for Ubuntu 16.04]
GitHub: https://github.com/xairy/linux-kernel-exploitation
[CVE-2017-16995]
GitHub: https://github.com/Al1ex/CVE-2017-16995
[CVE-2017-16995: CVE-2017-16995（Ubuntu本地提权漏洞）]
GitHub: https://github.com/C0dak/CVE-2017-16995
[CVE-2017-16995: Linux Kernel Version 4.14 - 4.4 (Ubuntu && Debian)]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C

CVSS Base Score:	7.2 (High)
Impact Subscore:	10.0
Exploitability Subscore:	3.9
CVSS Temporal Score:	6.3 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.3 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CVSS Base Score:	7.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	1.8
CVSS Temporal Score:	7.5 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.5 (High)

Go back to menu.

Plugin Source

This is the ubuntu_USN-3633-1.nasl nessus plugin source code. Ubuntu Security Notice (C) 2018-2020 Canonical, Inc. / NASL script (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3633-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(109317);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/09/17");

  script_cve_id("CVE-2017-16995");
  script_xref(name:"USN", value:"3633-1");

  script_name(english:"Ubuntu 16.04 LTS : Linux kernel (Intel Euclid) vulnerability (USN-3633-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis",
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Jann Horn discovered that the Berkeley Packet Filter (BPF)
implementation in the Linux kernel improperly performed sign extension
in some situations. A local attacker could use this to cause a denial
of service (system crash) or possibly execute arbitrary code.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/3633-1/"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"Update the affected linux-image-4.4-euclid and / or linux-image-euclid
packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Linux BPF Sign Extension Local Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-euclid");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-euclid");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/24");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2018-2020 Canonical, Inc. / NASL script (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("ksplice.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(16\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

if (get_one_kb_item("Host/ksplice/kernel-cves"))
{
  rm_kb_item(name:"Host/uptrack-uname-r");
  cve_list = make_list("CVE-2017-16995");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for USN-3633-1");
  }
  else
  {
    _ubuntu_report = ksplice_reporting_text();
  }
}

flag = 0;

if (ubuntu_check(osver:"16.04", pkgname:"linux-image-4.4.0-9026-euclid", pkgver:"4.4.0-9026.28")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"linux-image-euclid", pkgver:"4.4.0.9026.27")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "linux-image-4.4-euclid / linux-image-euclid");
}

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/ubuntu_USN-3633-1.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\ubuntu_USN-3633-1.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/ubuntu_USN-3633-1.nasl

Go back to menu.

How to Run

Here is how to run the Ubuntu 16.04 LTS : Linux kernel (Intel Euclid) vulnerability (USN-3633-1) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Ubuntu Local Security Checks plugin family.
On the right side table select Ubuntu 16.04 LTS : Linux kernel (Intel Euclid) vulnerability (USN-3633-1) plugin ID 109317.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl ubuntu_USN-3633-1.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a ubuntu_USN-3633-1.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - ubuntu_USN-3633-1.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state ubuntu_USN-3633-1.nasl -t <IP/HOST>

Go back to menu.

References

USN | Ubuntu Security Notice:

3633-1

See also:

Similar and related Nessus plugins:

105433 - Debian DSA-4073-1 : linux - security update
124985 - EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1532)
105726 - Ubuntu 17.10 : linux vulnerabilities (USN-3523-1) (Meltdown)
105747 - Ubuntu 16.04 LTS : linux-hwe, linux-azure, linux-gcp, linux-oem vulnerabilities (USN-3523-2) (Meltdown)
105748 - Ubuntu 17.10 : linux-raspi2 vulnerabilities (USN-3523-3)
108842 - Ubuntu 16.04 LTS : linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities (USN-3619-1)
108878 - Ubuntu 14.04 LTS : linux-lts-xenial, linux-aws vulnerabilities (USN-3619-2)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file ubuntu_USN-3633-1.nasl version 1.11. For more plugins, visit the Nessus Plugin Library.

Go back to menu.

Ubuntu 16.04 LTS : Linux kernel (Intel Euclid) vulnerability (USN-3633-1) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

Nessus Plugin Library

Solving Problems with Office 365 Email from GoDaddy

Empire Module Library

CrackMapExec Module Library

Metasploit Android Modules

Top 16 Active Directory Vulnerabilities

Top 10 Vulnerabilities: Internal Infrastructure Pentest

Terminal Escape Injection

Cisco Password Cracking and Decrypting Guide

Capture Passwords using Wireshark

SSH Brute Force Attack Tool using PuTTY / Plink (ssh-putty-brute.ps1)

SMB Brute Force Attack Tool in PowerShell (SMBLogin.ps1)

Port Scanner in PowerShell (TCP/UDP)

Nessus CSV Parser and Extractor

Default Password Scanner (default-http-login-hunter.sh)