QID 377778

QID 377778: Citrix XenServer Security Updates (CTX316324)

Security issues have been identified that affect Citrix Xenserver : CVE-2021-27379 : privileged code in a guest VM may cause the host to crash or become unresponsive. CVE-2021-28692 : privileged code in a guest VM may cause the host to crash or become unresponsive. CVE-2021-0089/CVE-2021-26313 : malicious code running on a CPU could infer the value of registers or memory belonging to other processes running on that CPU.

Affected Products:
Citrix XenServer 7.1 LTSR CU2
Note: This QID will detect only for Citrix XenServer 7.1 LTSR

QID Detection Logic (Authenticated):
OS:Citrix XenServer
The QID checks if Hotfixes is applied on the vulnerable versions of Citrix XenServer.

Vulnerable version could allow privileged code in a guest VM to cause the host to cash or become unresponsive.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as Medium - 5.9 severity.
    • Solution

    Hotfixes have been released for Citrix XenServer to address these issues. Refer to CTX316324 to obtain more information.

    Vendor References

    CVEs related to QID 377778

    CVE-2021-27379 | CVE-2021-28692 | CVE-2021-0089 | CVE-2021-26313 |
    Software Advisories
    Advisory ID Software Component Link
    CTX316324 URL Logo support.citrix.com/article/CTX316324/citrix-hypervisor-security-update
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