Azure VM Command Execution Using Third-Party Extensions – Sa... - #332
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🔗 Additional ContextOriginal Blog Post: https://netspi.com/blog/technical-blog/cloud-pentesting/azure-vm-command-execution-using-third-party-extensions-part-2 Content Categories: Based on the analysis, this content was categorized under "Pentesting Cloud > Azure Pentesting > Az - Privilege Escalation > Az - Virtual Machines & Network Privesc; cross-reference from Az - Post Exploitation > Az - VMs & Network Post Exploitation under a new subsection such as "VM Extension Write to Guest RCE via Rogue Salt Master"". Repository Maintenance:
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🤖 Automated Content Update
This PR was automatically generated by the HackTricks News Bot based on a technical blog post.
📝 Source Information
🎯 Content Summary
Attack overview
The post demonstrates how Azure VM extension-management permissions can be converted into arbitrary operating-system command execution by abusing the legitimate third-party Salt Minion extension. This is not associated with a CVE. An attacker controlling an Azure principal with
Microsoft.Compute/virtualMachines/extensions/writecan install the extension on a Linux or Windows VM, configure it to connect to an attacker-controlled Salt Master, accept the VM's...🔧 Technical Details
Converting Azure extension-write access into guest command execution: If an Azure principal can perform
Microsoft.Compute/virtualMachines/extensions/write, it may be able to cross from control-plane access into the operating-system guest by installing a legitimate management extension configured with attacker-controlled infrastructure. For Salt, deployturtletraction.oss/salt-minion.linuxorsalt-minion.windowsand setmaster_addressto a rogue Salt Master. The VM agent installs the extension, after which the minion initiates outbound ZeroMQ connections over TCP4505/4506. This avoids SSH, RDP, guest credentials, and inbound connectivity while making the activity resemble legitimate VM administration.Taking control of a Salt Minion through a rogue master: A newly connected minion submits its public key and remains untrusted until the master accepts it with
salt-key -a <...🤖 Agent ActionsDone — I updated:
src/pentesting-cloud/azure-security/az-privilege-escalation/az-virtual-machines-and-network-privesc.mdAdded a new subsection under
Microsoft.Compute/virtualMachines/extensions/writecovering:az vm extension setexamplessalt-key/salt ... cmd.runusageAlso added a
## Referencessection at the end with:I kept the change in a single file to avoid duplication.
This PR was automatically created by the HackTricks Feed Bot. Please review the changes carefully before merging.