QID 375504

Date Published: 2021-04-29

QID 375504: Citrix XenServer Security Updates(CTX306565)

Citrix XenServer is an open source server virtualization platform based on the Xen hypervisor.

CVE-2021-28038: An attacker with the ability to execute privileged mode code in a guest can perform a denial of service attack against the host.
CVE-2021-28688: An attacker with the ability to execute privileged mode code in a guest can perform a denial of service attack against the host.

Affected Versions:
Citrix XenServer 7.1 LTSR, Citrix XenServer 7.0 Note: This QID will detect only for Citrix XenServer 7.1 LTSR ,Citrix XenServer 7.0

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

On Successful exploitation could allow privileged code in a guest VM to cause the host to crash or become unresponsive.

  • CVSS V3 rated as High - 6.5 severity.
  • CVSS V2 rated as Medium - 4.9 severity.
    • Solution

    Hotfixes have been released for Citrix XenServer to address these issues. Refer to CTX306565 to obtain more information.

    Vendor References

    CVEs related to QID 375504

    CVE-2021-28038 | CVE-2021-28688 |
    Software Advisories
    Advisory ID Software Component Link
    CTX306565 URL Logo support.citrix.com/article/CTX306565
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