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Advisories

WebVirtCloud Missing Authorization on Instance Control Actions

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severity
high
date
Affecting

  • webvirtcloud 1b2da68b2800f94674dd96f4a986cde30ac88280

CWE
  • CWE-862 Missing Authorization
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
George Chen
Description
WebVirtCloud fails to properly validate permission flags in UserInstance grants, allowing view-only users to perform privileged actions. Attackers with read-only grants can power off virtual machines, reset root passwords, install SSH keys, and manage ISO images by exploiting the get_instance gate that only checks grant existence.

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