Citrix XenServer Multiple Security Updates (CTX220112)

Several security issues have been identified within Citrix XenServer. SPDX-FileCopyrightText: 2017 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE =...

Citrix XenServer Multiple Vulnerabilities (CTX219378)

The version of Citrix XenServer installed on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities : - A flaw exists in x86 instruction CMPXCHG8B due to legacy operand size overrides not being properly ignored when handling prefixes. A guest attacker...

Error while Installing XenServer Tools "Your Tools ISO is on a broken SR, XenCenter will attempt to fix it before proceeding. Do you wish to continue"?

Error found in the xensource.log,...

XenServer Fails to Boot with Boot from SAN Root Disk Multipathing:"Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)"

The XenServer host has recently been updated with a hotfix that updates the kernel. After patching the XenServer host is in a boot loop. During startup there is a message"Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block0,0" followed by a call trace: The initrd file size i...

Unable to add NFS to the XenServer, error : There was an error while attempting to mount the NFS share

Error while adding the storage to XenServer 6.5 There was an error while attempting to mount the NFS share Unable to mount manually, failed with "mount failed reason given by server : permission denied."...

Process to update XenServer Tools on PVS image with PVD

Process to update XenServer Tools on PVS image with PVD...

XenServer Pool Master is Unable to Boot with Error: "unexpected inconsistency; Run fsck Manually"

The following error is displayed when booting XenServer pool master: "Unexpected inconsistency; Run fsck Manually" The df -h command shows filesystem is read only...

Citrix XenServer Multiple Security Updates (CTX219378)

Security vulnerabilities have been identified in Citrix XenServer that may allow malicious code running within a guest VM to read a small part of hypervisor memory and allow privileged-mode code running within a guest VM to hang or crash the host. SPDX-FileCopyrightText: 2017 Greenbone AG Some te...

How to Setup Time on XenServer Manually When There Is No NTP Server

This is a situation where you don't have an AD , DC ,DNS or an NTP server in the environment to point the servers for syncing time...

Increase RAM for XenServer VM's through Command Line Interface.

Increase RAM for XenServer VM's through Command Line Interface. If the RAM editing option is grayed out through XenCenter...

License Server Error: No Licenses Available for Specified Server Type

When the XenServer is attempted to be licensed you may come across error "The license-server did not issue a license for server "servername" because there were no license for the specified type available"...

Citrix XenServer QEMU ioport Array Overflow Guest-to-Host Privilege Escalation (CTX219136)

The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by a privilege escalation vulnerability in the QEMU ioport component due to an array overflow that is triggered during the handling of addresses in ioport read and write look-ups. A...

CVE-2016-9637 - Citrix XenServer Security Update

Description of Problem A security vulnerability has been identified in Citrix XenServer that may allow malicious privileged-mode code running within an HVM guest VM to compromise the host. This vulnerability affects all currently supported versions of Citrix XenServer up to and including Citrix...

Citrix XenServer Multiple Vulnerabilities (CTX218775)

The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities : - A flaw exists in the sniffnetware function within file tools/pygrub/src/pygrub when handling string quotes and S-expressions in the bootloader whenev...

Citrix XenServer Multiple Security Updates (CTX218775)

A number of security vulnerabilities have been identified in Citrix XenServer that may allow malicious code running within a guest VM to compromise the host. SPDX-FileCopyrightText: 2016 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the...

Citrix XenServer Security Update for CVE-2016-7777 (CTX217363)

A security vulnerability has been identified in Citrix XenServer that may allow malicious user code within an HVM guest VM to read or modify the contents of certain registers belonging to other tasks within that same guest VM. SPDX-FileCopyrightText: 2016 Greenbone AG Some text descriptions might...

CVE-2016-7777 - Citrix XenServer Security Update

Description of Problem A security vulnerability has been identified in Citrix XenServer that may allow malicious user code within an HVM guest VM to read or modify the contents of certain registers belonging to other tasks within that same guest VM. This vulnerability affects all currently...

How to find the hotfix applied on XenServer ?

Get a list of hotfixapplied on XenServer and when it was applied on the Host both from XenCenter or from the command line...

How to create a raw VDI on XenServer ?

Sometimes when performance is important over other functionalities like snapshot fast clone which are provided by the VHD layer, we need to create raw VDI...

XenServer Host become responsive In Reboot/Shutdown

XenServer hangs on reboot with following message in serial logs Sending all processes the TERM signal... Sending all processes the KILL signal... Saving random seed: Syncing hardware clock to system time Turning off swap: Unmounting pipe file systems: Unmounting file systems: Please stand by whil...