Tag: Web Application Security

Unauthorized RCE in VMware vCenter

Written by Mikhail Klyuchnikov on February 24, 2021

Since the PoC for the VMware vCenter RCE (CVE-2021-21972) is now readily available, we’re publishing our article covering all of the technical details.

In fall of 2020, I discovered couple vulnerabilities in the vSphere Client component of VMware vCenter. These vulnerabilities allowed non-authorized clients to execute arbitrary commands and send requests on behalf of the targeted server via various protocols:

Unauthorized file upload leading to remote code execution (RCE) (CVE-2021- 21972)
An unauthorized server-side request forgery (SSRF) vulnerabilities (CVE-2021-21973)

In this article, I will cover how I discovered the VMware vSphere client RCE vulnerability, divulge the technical details, and explain how it can be exploited on various platforms.

Swarm of Palo Alto PAN-OS vulnerabilities

Written by Mikhail Klyuchnikov and Nikita Abramov on February 11, 2021

Palo Alto Networks next-generation firewall (NGFW) is one of the leading enterprise firewalls used by companies around the world to protect against various cyber-attacks. It runs on its own operating system «PAN-OS».

In this article, we will analyze the vulnerabilities that lead to:

Arbitrary OS command execution by an authorized user — CVE-2020-2037 and CVE-2020-2038
DoS by an unauthorized user — CVE-2020-2039
Reflected Cross Site Scripting (XSS) — CVE-2020-2036

Using these vulnerabilities, an attacker can gain access to sensitive data, disrupt the availability of firewall components or gain access to internal network segments.

Vulnerabilities in McAfee ePolicy Orchestrator

Written by Mikhail Klyuchnikov on December 7, 2020

This August, I discovered three vulnerabilities in McAfee ePolicy Orchestrator (ePO) version 5.10.0. McAfee ePO is software that helps IT administrators unify security management across endpoints, networks, data, and compliance solutions from McAfee and third-party solutions. McAfee ePO provides flexible automated management capabilities for identifying, handling, and responding to security issues and threats.

My testing uncovered three vulnerabilities:

A CSRF + SSRF + MITM chain that, if successfully exploited, allows an attacker who is not logged in to perform remote code execution on the server
Remote code execution by a logged-in user as the result of a ZipSlip attack
Reflected XSS

Vulnerabilities in Checkpoint ICA Management Tool

Written by Mikhail Klyuchnikov and Nikita Abramov on November 25, 2020

Today we will be analysing multiple vulnerabilities that we found in a component of Checkpoint Security Management, which is used in Check Point products. The component in question is the ICA Management Tool.

Path Traversal on Citrix XenMobile Server

Written by Andrey Medov on November 16, 2020

Citrix Endpoint Management, aka XenMobile, is used for managing employee mobile devices and mobile applications. Usually it is deployed on the network perimeter and has access to the internal network due to Active Directory integration. This makes XenMobile a prime target for security research.

During such research a path traversal vulnerability was discovered. This vulnerability allowed an unauthorized user to read arbitrary files, including configuration files containing passwords.

Advanced MSSQL Injection Tricks

Written by PT SWARM Team on November 12, 2020

We compiled a list of several techniques for improved exploition of MSSQL injections. All the vectors have been tested on at least three of the latest versions of Microsoft SQL Server: 2019, 2017, 2016SP2.

Grafana 6.4.3 Arbitrary File Read

Written by Yuriy Dyachenko on August 27, 2020

Grafana is an open-source application used for analytics, monitoring, and data visualization. Thousands of companies use Grafana, including major representatives such as PayPal, eBay, and Intel.

Last fall I found an Authenticated Arbitrary File Read vulnerability (CVE-2019-19499) in this system. Here I’ll share the details about how this vulnerability worked.

Vulnerabilities in the Openfire Admin Console

Written by Alexandr Shvetsov on August 4, 2020

Openfire is a Jabber server supported by Ignite Realtime. It’s a cross-platform Java application, which positions itself as a platform for medium-sized enterprises to control internal communications and make instant messaging easier.

I regularly see Openfire on penetration testing engagements, and most of the time all interfaces of this system are exposed to an external attacker, including the administrative interface on 9090/http and 9091/https ports:

Since the Openfire system is available on GitHub, I decided to examine the code of this web interface. This is a short writeup about two vulnerabilities I was able to find.

Remote Code Execution in F5 Big‑IP

Written by Mikhail Klyuchnikov on July 15, 2020

This is Big-IP, an application delivery and security services platform by F5 Networks, namely its Traffic Management User Interface (TMUI). In this article I will show how I’ve managed to discover CVE-2020-5902, an Unauthenticated Remote Command Execution vulnerability, in its web interface.

The CVE-2020-5902 vulnerability has been assigned a CVSS score of 10, the highest possible. According to the Threat Intelligence Services of Positive Technologies, before the fixes there were more than 8,000 devices available on the Internet and vulnerable to this issue.

Remote Code Execution in Citrix ADC

Written by Mikhail Klyuchnikov on July 8, 2020

Many of you have probably heard of the CVE-2019-19781 vulnerability that I discovered at the end of last year. It is a critical vulnerability in Citrix ADC that allows unauthorized users to execute arbitrary operating system commands.

It caused quite a stir when Citrix released its guidelines for addressing the vulnerability since approximately 80,000 companies from around the globe were threatened by the problem. Another reason why the vulnerability attracted so much attention because Citrix ADC is installed on the border between external and internal organization networks. Thus, when a hacker exploits the CVE-2019-19781 vulnerability, he or she simultaneously gains access to the targeted company’s internal network and is able to develop attacks on the private segment of the network.