Posts

CVE-2020-17095 | Windows Hyper-V Remote Code Execution Vulnerability

Published: 2020-12-08
MITRE CVE-2020-17095

“A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit this vulnerability, an attacker could run a specially crafted application on a Hyper-V guest that could cause the Hyper-V host operating system to execute arbitrary code when it fails to properly validate vSMB packet data.”

This is especially bad for “hotel” environment with multiple different tenants that should not be able to influence each other, but it is also bad for environments with different levels of security sensitivity within the same tenant.

There is no workarounds or possible mitigations in the configuration.

CVSS Base Score is 8.5

Basefarm and Microsoft recommends that you install the updates for this vulnerability as soon as possible.

Basefarm is currently evaluating this vulnerability, how to best handle it and ensure operational stability for all our customers. We are tracking this internally as BF-VLN-2180090 with the highest priority.

CVE-2020-16891 | Windows Hyper-V Remote Code Execution Vulnerability

Published: 2020-10-13
MITRE CVE-2020-16891

“A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system.”

This is especially bad for “hotel” environment with multiple different tenants that should not be able to influence each other, but it is also bad for environments with different levels of security sensitivity within the same tenant.

There is no workarounds or possible mitigations in the configuration.

CVSS Base Score is 8.8

Basefarm and Microsoft recommends that you install the updates for this vulnerability as soon as possible.

Basefarm is currently evaluating this vulnerability, how to best handle it and ensure operational stability for all our customers. We are tracking this internally as BF-VLN-2140691with the highest priority.

CVE-2020-3992 | ESXi OpenSLP remote code execution vulnerability

Published: 2020-10-20
MITRE CVE-2020-3992

“A malicious actor residing in the management network who has access to port 427 on an ESXi machine may be able to trigger a use-after-free in the OpenSLP service resulting in remote code execution.”

The workaround is to stop and disable the SLP service.

CVSS Base Score is 9.8

Basefarm and VMware recommends that you install the updates for this vulnerability as soon as possible. Basefarm also recommends that the management services of ESXi servers are not available for regular users, but are places on a protected network.

Basefarm is currently evaluating this vulnerability, how to best handle it and ensure operational stability for all our customers. We are tracking this internally as BF-VLN-2146240 with the highest priority.

CVE-2020-0618 | Microsoft SQL Server Reporting Services Remote Code Execution Vulnerability

Published by Microsoft: 02/11/2020
MITRE CVE-2020-0618

“A remote code execution vulnerability exists in Microsoft SQL Server Reporting Services when it incorrectly handles page requests. An attacker who successfully exploited this vulnerability could execute code in the context of the Report Server service account.”

There exists a proof of concept and write-up.

Basefarm considers this a Base CVSS Score: 9.8 (Critical) – but there exists an official fix from Microsoft, bringing the Temporal CVSS Score down to a 9.4 (Critical).

And we consider most of our users do not expose Microsoft SQL Server Reporting Service directly to the internet, so this CVSS Environmental Score can be lowered down to a 7.6 (High).

Per Basefarm Vulnerability process we still consider this a priority 1 (of 3) issue, and we will not wait until normal patch window to mitigate this issue. Internally we are tracking this progress in BF-VLN-1990987, registered 2020-02-18.

Security Software & Tools Tips – December 2019

In this monthly post, we try to make you aware of five different security-related products.
This is a repost from my personal website Ulyaoth

This month we have chosen for the following:
* Azure Arc
* CloudGuard Dome9
* Flan Scan
* Lynis
* Wapiti

Azure Arc

Information from the Azure Arc website:

Azure Arc extends management & security to any infrastructure.

Website:

https://azure.microsoft.com/en-us/services/azure-arc/

CloudGuard Dome9

Information from the CloudGuard Dome9 website:

The Dome9 Arc agentless SaaS platform delivers full visibility and control of security and compliance in AWS, Azure and Google Cloud environments. Minimize your attack surface and protect against vulnerabilities, identify theft and data loss.

Website:

https://dome9.com/

Flan Scan

Information from the Flan Scan website:

Flan Scan is a lightweight network vulnerability scanner. With Flan Scan you can easily find open ports on your network, identify services and their version, and get a list of relevant CVEs affecting your network.

Website:

https://github.com/cloudflare/flan

Lynis

Information from the Lynis website:

Lynis is a battle-tested security tool for systems running Linux, macOS, or Unix-based operating system. It performs an extensive health scan of your systems to support system hardening and compliance testing.

Website:

https://cisofy.com/lynis/

Wapiti

Information from the Wapiti website:

Wapiti is a vulnerability scanner for web applications. It currently search vulnerabilities like XSS, SQL and XPath injections, file inclusions, command execution, XXE injections, CRLF injections, Server Side Request Forgery, Open Redirects…

Website:

https://sourceforge.net/projects/wapiti/

Image by MasterTux from Pixabay

Security Software & Tools Tips – November 2019

In this monthly post, we try to make you aware of five different security-related products.
This is a repost from my personal website Ulyaoth

This month we have chosen for the following:
* Kismet
* MAGNET RAM Capture
* RedLock
* SQLMap
* Wazuh

Kismet

Information from the block-doh website:

Kismet is a wireless network and device detector, sniffer, wardriving tool, and WIDS (wireless intrusion detection) framework.

Website:

https://kismetwireless.org/

MAGNET RAM Capture

Information from the MAGNET RAM Capture website:

MAGNET RAM Capture is a free imaging tool designed to capture the physical memory of a suspect’s computer, allowing investigators to recover and analyze valuable artifacts that are often only found in memory.

Website:

https://www.magnetforensics.com/resources/magnet-ram-capture/

RedLock

Information from the RedLock website:

RedLock Enables Cloud Threat Defense: Threat defense in the cloud requires a new AI-driven approach that correlates disparate security data sets including network traffic, user activities, risky configurations and threat intelligence, to provide a unified view of risks across fragmented cloud environments.

Website:

https://redlock.io/

SQLMap

Information from the SQLMap website:

sqlmap is an open source penetration testing tool that automates the process of detecting and exploiting SQL injection flaws and taking over of database servers. It comes with a powerful detection engine, many niche features for the ultimate penetration tester, and a broad range of switches including database fingerprinting, over data fetching from the database, accessing the underlying file system, and executing commands on the operating system via out-of-band connections.

Website:

https://github.com/sqlmapproject/sqlmap

Wazuh

Information from the Wazuh website:

Wazuh is a free, open source and enterprise-ready security monitoring solution for threat detection, integrity monitoring, incident response and compliance.

Website:

https://wazuh.com/

Image by StockSnap from Pixabay

Security Software & Tools Tips – October 2019

In this monthly post, we try to make you aware of five different security-related products.
This is a repost from my personal website Ulyaoth

This month we have chosen for the following:
* block-doh
* DisableWinTracking
* P0f
* GitGuardian
* Sandboxie

block-doh

Information from the block-doh website:

DoH provides “privacy” at the expense of security. The prominent providers do NOT filter malicious websites, domains, and IP addresses. This has the effect of creating a mechanism by which hackers bypass security policy and this has been observed in the wild. Organizations that use DNS to protect their constituents are directly harmed by DoH.

Website:

https://github.com/bambenek/block-doh

DisableWinTracking

Information from the DisableWinTracking website:

A tool that uses some of the known methods of disabling tracking in Windows 10.

Website:

https://github.com/10se1ucgo/DisableWinTracking

P0f

Information from the P0f website:

P0f is a tool that utilizes an array of sophisticated, purely passive traffic fingerprinting mechanisms to identify the players behind any incidental TCP/IP communications (often as little as a single normal SYN) without interfering in any way.

Website:

http://lcamtuf.coredump.cx/p0f3/

GitGuardian

Information from the GitGuardian website:

GitGuardian is a cybersecurity bot. It prevents public exposure of your secrets from your Github repo. It is also the first platform scanning all GitHub public activity in real time for API secret tokens, database credentials or vault keys.

Website:

https://www.gitguardian.com/

Sandboxie

Information from the Sandboxie website:

Sandboxie uses isolation technology to separate programs from your underlying operating system preventing unwanted changes from happening to your personal data, programs and applications that rest safely on your hard drive.

Website:

https://www.sandboxie.com/

Image by 200 Degrees from Pixabay

Security Software & Tools Tips – September 2019

In this monthly post, we try to make you aware of five different security-related products.
This is a repost from my personal website Ulyaoth

This month we have chosen for the following:
* CipherCloud
* CodeDiaper
* N-Stalker
* Passhunt
* SonarTS

CipherCloud

Information from the CipherCloud website:

The CipherCloud CASB+ platform provides deep visibility, end-to-end data protection, advanced threat protection, and comprehensive compliance capabilities for enterprise embracing cloud-based applications.

Website:

https://www.ciphercloud.com/ciphercloud-overview/

CodeDiaper

Information from the CodeDiaper website:

You can search for a specific string from all the source code on GitHub and check if it has been posted illegally.

Website:

https://github.com/future-architect/code-diaper

N-Stalker

Information from the N-Stalker website:

N-Stalker Web Application Security Scanner X Free Edition provides a restricted set of free Web Security Assessment checks to enhance the overall security of your web server infrastructure, using the most complete web attack signature database available in the market – “N-Stealth Web Attack Signature Database”.

Website:

https://www.nstalker.com/products/editions/free/

Passhunt

Information from the Passhunt website:

Passhunt is a simple tool for searching of default credentials for network devices, web applications and more. Search through 523 vendors and their 2084 default passwords.

Website:

https://github.com/Viralmaniar/Passhunt

SonarTS

Information from the SonarTS website:

Static code analyzer for TypeScript detecting bugs and suspicious patterns in your code.

Website:

https://github.com/SonarSource/SonarTS

Image by Pete Linforth from Pixabay

Security Software & Tools Tips – August 2019

In this monthly post, we try to make you aware of five different security-related products.
This is a repost from my personal website Ulyaoth

This month we have chosen for the following:
* Vuls
* Dirhunt
* InsightIDR
* SubDomainizer
* Atomic Red Team

Vuls

Information from the Vuls website:

Vuls is open-source, agent-less vulnerability scanner for Linux, FreeBSD, Container Image, Running Container, WordPress, Programming language libraries and Network devices based on information from NVD, OVAL, etc.

Website:

https://vuls.io/

Dirhunt

Information from the Dirhunt website:

Dirhunt is a web crawler optimize for search and analyze directories. This tool can find interesting things if the server has the “index of” mode enabled. Dirhunt is also useful if the directory listing is not enabled. It detects directories with false 404 errors, directories where an empty index file has been created to hide things and much more.

Website:

https://github.com/Nekmo/dirhunt

InsightIDR

Information from the InsightIDR website:

Rapid7 InsightIDR is an intruder analytics solution that gives you the confidence to detect and investigate security incidents faster, a Cloud SIEM for your modern network.

Website:

https://www.rapid7.com/products/insightidr/

SubDomainizer

Information from the SubDomainizer website:

SubDomainizer is a tool designed to find hidden subdomains and secrets present is either webpage, Github, and external javascripts present in the given URL. This tool also finds S3 buckets, cloudfront URL’s and more from those JS files which could be interesting like S3 bucket is open to read/write, or subdomain takeover and similar case for cloudfront. It also scans inside given folder which contains your files.

Website:

https://github.com/nsonaniya2010/SubDomainizer

Atomic Red Team

Information from the Atomic Red Team website:

Atomic Red Team is a library of simple tests that every security team can execute to test their defenses. Tests are focused, have few dependencies, and are defined in a structured format that can be used by automation frameworks.

Website:

https://atomicredteam.io/

Image by vishnu vijayan from Pixabay

Security Software & Tools Tips – July 2019

In this monthly post, we try to make you aware of five different security related products.
This is a repost from my personal website Ulyaoth

This month we have chosen for the following:
* anevicon
* OpenVPN
* HoneyPy
* sqreen
* Dshell

anevicon

Information from the anevicon website:

A high-performant traffic generator, designed to be as convenient and reliable as it is possible. It sends numerous UDP packets to a server, thereby simulating an activity that can be produced by your end users or a group of hackers.

Website:

https://github.com/Gymmasssorla/anevicon

OpenVPN

Information from the OpenVPN website:

OpenVPN provides flexible VPN solutions to secure your data communications, whether it’s for Internet privacy, remote access for employees, securing IoT, or for networking Cloud data centers.

Website:

https://openvpn.net

HoneyPy

Information from the HoneyPy website:

A low interaction honeypot with the capability to be more of a medium interaction honeypot.

Website:

https://github.com/foospidy/HoneyPy

sqreen

Information from the sqreen website:

Unified security monitoring and protection for modern cloud environments. Easily enable protections tailored to your stack, get unprecedented visibility into your security and scale it in production.

Website:

https://www.sqreen.com

Dshell

Information from the Dshell website:

An extensible network forensic analysis framework. Enables rapid development of plugins to support the dissection of network packet captures.

Website:

https://github.com/USArmyResearchLab/Dshell

Photo by Markus Spiske on Unsplash