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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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 input validation on parameters passed in HTTP request, leaving the application vulnerable to...
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.
Ivanti Unified Endpoint Manager’s “ldcient” component expose information about the system that could be used in further attacks against the system.
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
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’).
Advisory CVE-2020-13771 – Ivanti Unified Endpoint Manager DLL search order hijacking privilege escalation
Various services running as user ‘NT AUTHORITY\SYSTEM’ rely on Windows’ DLL search order for loading DLL files that are not present on the filesystem. Under certain circumstances, a local attacker would be able to place a malicious DLL file to obtain code execution in the vulnerable service’s context to elevate privileges.
Recently JUMPSEC’s youngest red team researcher @_batsec_ raised the bar once more using rootkit techniques to universally evade Sysmon.
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