PCoIP Agent privilege escalation via USB vHub

Advisory Information

  • Advisory ID: TERA-SA-000100
  • CVE Numbers and Scores:
  • Published: 15 July 2021
  • Last Updated: 15 July 2021
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Summary

The vHub driver accepted IOCTL commands from any program. An attacker could pass data into the vHub driver to change the flow of program execution within vHub driver to the attacker's choosing, possibly leading to an escalation of privileges.


Affected Products

  • PCoIP Agent for Windows prior to version 21.07.0

Solutions and Mitigations

Available Updates

The latest PCoIP Agents for Windows and Linux are available from here.

Vulnerability Details

CVE-2021-25695

The USB vHub in the Teradici PCOIP Software Agent prior to version 21.07.0 would accept commands from any program, which may allow an attacker to elevate privileges by changing the flow of program execution within the vHub driver.

Remark

Vulnerability classification has been performed using the CVSSv3 scoring system. The CVSS environmental score is specific to each customer’s environment and should be defined by the customer to attain a final scoring.


Additional Resources


Revision History

15 July 2021: Initial Publication


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