CVE intelligence and bounded remediation
CVE-2020-8283 — Citrix Virtual Apps And Desktops security vulnerability
High
CVSS 9
An authorised user on a Windows host running Citrix Universal Print Server can perform arbitrary command execution as SYSTEM in CVAD versions before 2009, 1912 LTSR CU1 hotfixes CTX285870 and CTX286120, 7.15 LTSR CU6 hotfix CTX285344 and 7.6 LTSR CU9.
- Severity
- High
- CVSS
- 9 (2.0)
- Published
- 2020-12-14
- CISA KEV
- Not currently listed
- Ecosystem
- windows/system
- Weaknesses
- CWE-269
Affected products
- citrix / virtual_apps_and_desktops
- citrix / xenapp
- citrix / xenapp / 7.6
- citrix / xenapp / 7.15
- citrix / xendesktop
- citrix / xendesktop / 7.6
Showing 6 representative product identities from 14 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.
Matched remediation archetype
Privilege escalation and unsafe privilege management
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
- Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
- Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.
Remediate safely
- Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
- Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
- Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.
Authoritative sources
Complete CVE record and remediation plan
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