Published | JUMPSEC LABS

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

by lrckt | Jan 26, 2022 | Research, Security Bug, Vulnerability

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...

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.

Burp Suite and Beyond: Exploring non-HTTP protocols using MITM_RELAY

In this article, Muhammet takes us on a deep technical journey to persevere beyond the limitations of the proxy tool Burpsuite, and explore non-HTTP, application-layer protocols using ‘MITM RELAY’.

Overcoming Issues Using Custom Python Scripts with Burp Suite Professional

by p.osborn | Apr 28, 2021 | Application Security

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...

Win a place @HackFu 2021 Community Edition!

by jstester007 | Dec 21, 2020 | CTFs

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):...

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

by xnand | Nov 13, 2020 | Detection, Jumpsec, Research

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.

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

by xnand | Nov 13, 2020 | Jumpsec, Research

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...

Advisory CVE-2020-13769 – Ivanti Unified Endpoint Manager SQL injection

by xnand | Nov 13, 2020 | Jumpsec, Research

A number of web components in Endpoint Manager do not properly sanitize user input when executing SQL queries, leaving the application vulnerable to injection attacks towards the underlying database. On a standard installation with default options, the account used to query the database is database administrator.

Advisory CVE-2020-13772 – Ivanti Unified Endpoint Manager system information disclosure

by xnand | Nov 13, 2020 | Jumpsec, Research

Ivanti Unified Endpoint Manager’s “ldcient” component expose information about the system that could be used in further attacks against the system.

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

by xnand | Nov 12, 2020 | Jumpsec, Research

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.

Advisory CVE-2020-13770 – Ivanti Unified Endpoint Manager named pipe token impersonation privilege escalation

by xnand | Nov 11, 2020 | Jumpsec, Research

Several services are accessing named pipes with default or overly permissive security attributes; as these services run as user ‘NT AUTHORITY\SYSTEM’, the issue can be used to escalate privileges from a local standard or service account having SeImpersonatePrivilege (eg. user ‘NT AUTHORITY\NETWORK SERVICE’).

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JUMPSEC LABS

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

PowerShell Jobs

Burp Suite and Beyond: Exploring non-HTTP protocols using MITM_RELAY

Overcoming Issues Using Custom Python Scripts with Burp Suite Professional

Win a place @HackFu 2021 Community Edition!

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

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

Advisory CVE-2020-13769 – Ivanti Unified Endpoint Manager SQL injection

Advisory CVE-2020-13772 – Ivanti Unified Endpoint Manager system information disclosure

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

Advisory CVE-2020-13770 – Ivanti Unified Endpoint Manager named pipe token impersonation privilege escalation

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