JUMPSEC LABS

The JUMPSEC Lab is a place where the the technical team get creative and showcase their latest security research, publications, interesting news and general thoughts!  We love what we do and are passionate about security, with some great upcoming projects planned, bookmark our site and stick around to see what we are working on.

Advisory CVE-2021-41550 Leostream Connection Broker – Authenticated Remote Code Execution

Software: Leostream Connection BrokerAffected Versions: 9.0.40.17Vendor page: https://leostream.com/CVE Reference: CVE-2021-41550Published: 25/01/2022Attack Vector: Remote, authenticatedCredits: Andrei Constantin Scutariu, Lenk Ratchakrit Seriamnuai, Andrea Malusardi Summary As the Leostream Connection Broker version: 9.0.40.17 allowed an attacker to upload any content through Third Party Content functionality, it was found that the application allowed the listed filenames below the ability to execute Perl programming language by default on the web application. Mitigation The Leostream has released a patch for this vulnerability, JUMPSEC recommend upgrading the affected versions as soon as possible. Leostream's release notes and advisories can be found here. Technical details For achieving remote code execution, an attacker with administrator access to the application - or access as a...

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PowerShell Jobs

PowerShell Jobs

JUMPSEC investigators recently observed an adversary weaponising PowerShell Jobs to schedule their attack whilst responding to an incident. We discuss what PowerShell Jobs are, how they can be leveraged for malicious purposes, and how defenders can protect, detect, and respond to neutralise the threat.

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Overcoming Issues Using Custom Python Scripts with Burp Suite Professional

Summary / TL:DR I recently encountered some issues when using Burp Suite Professional which led me to playing around with the Python Scripter extension. The extension allows running custom Python scripts on every request/response processed by Burp, including those generated by functionality such as Burp's active scanner. This has a number of potential use cases, but I found it particularly...

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Win a place @HackFu 2021 Community Edition!

Hello world!At JUMPSEC we’ve managed to get our hands on tickets to what is probably the greatest cyber security event in the calendar, HackFu!In order to be in with a chance of winning you simply need to complete the following challenge which you can download here (the download contains all the information needed to complete the challenge):...

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Detecting known DLL hijacking and named pipe token impersonation attacks with Sysmon

Recently we posted a bunch of advisories relating to Ivanti Unified Endpoint Manager, a couple of which are for vulnerabilities which can be used to achieve local privilege escalation. We will give a brief explanation of the vulnerabilities and an example of Sysmon configuration rules to log exploitation attempts, along with the rationale behind them so you can adapt them to your existing configuration if needed.

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Advisory CVE-2020-13773 – Ivanti Unified Endpoint Manager Reflected XSS

Software: Ivanti Endpoint ManagerAffected Versions: <= 2020.1.1Vendor page: www.ivanti.comCVE Reference: CVE-2020-13773Published: 13/11/2020CVSS 3.1 Score: 5.5 - AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:LAttack Vector: Remote, authenticatedCredits: Andrei Constantin Scutariu, Lenk Ratchakrit, Calvin Yau Summary Various web pages on Ivanti Unified Endpoint Manager web management console lack proper...

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Advisory CVE-2020-13774 – Ivanti Unified Endpoint Manager authenticated RCE via file upload

Improper validation on file upload functionality present in Ivanti Unified Endpoint Manager’s web management console permits an authenticated user to upload .aspx files and execute them on the MS IIS server’s context. The issue is caused by insufficient file extension validation and insecure file operations on the uploaded image, which upon failure will leave the temporarily created files in an accessible location on the server.

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GitHub Activity

 

Twitter

How can you investigate an incident if the logs have been deleted by an attacker?! 🙉😟

In our latest article, Dray ( @Purp1eW0lf) offers some digital forensics techniques you can use when the Windows event logs have been wiped! 🕵️‍♂️🕵️‍♀️

https://t.co/g4z12irzQB
What's your controversial cyber security opinion? #infosec #cybersecurity

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The information provided on this website is to be used for educational purposes only. The author is in no way responsible for any misuse of the information provided. Any actions and or activities related to the material contained within this website is solely your responsibility.