87 matches found
HVM soft-reset crashes toolstack
ISSUE DESCRIPTION libxl requires all data structures passed across its public interface to be initialized before use and disposed of afterwards by calling a specific set of functions. Many internal data structures also require this initialize / dispose discipline, but not all of them. When the...
CVE-2020-29487
An issue was discovered in Xen XAPI before 2020-12-15. Certain xenstore keys provide feedback from the guest, and are therefore watched by toolstack. Specifically, keys are watched by xenopsd, and data are forwarded via RPC through message-switch to xapi. The watching logic in xenopsd sends one R...
Design/Logic Flaw
An issue was discovered in Xen XAPI before 2020-12-15. Certain xenstore keys provide feedback from the guest, and are therefore watched by toolstack. Specifically, keys are watched by xenopsd, and data are forwarded via RPC through message-switch to xapi. The watching logic in xenopsd sends one R...
CVE-2020-29487
CVE-2020-29487 affects Xen XAPI (Xen hypervisor tooling). The issue stems from xenopsd watching xenstore keys and forwarding RPC updates via message-switch to xapi, causing an RPC update flood: one update per key update with O(N^2) time, and message-switch retaining ~128 recent messages yields O(...
Hotfix XS82E004 - For Citrix Hypervisor 8.2
Who Should Install This Hotfix? This is a hotfix for customers running Citrix Hypervisor 8.2. Information About this Hotfix Component| Details ---|--- Prerequisite| None Post-update tasks| None Content live patchable| No Baselines for Live Patch| N/A Revision History| Published on Oct 13, 2020...
Hotfix XS80E006 - For Citrix Hypervisor 8.0
Who Should Install This Hotfix? This is a hotfix for customers running Citrix Hypervisor 8.0. All customers who are affected by the issues described inCTX263477 - Citrix Hypervisor Multiple Security Updatesshould install this hotfix. Ensure that you also installCTX262555 - Hotfix XS80E005 - For...
UBUNTU-CVE-2018-12892
An issue was discovered in Xen 4.7 through 4.10.x. libxl fails to pass the readonly flag to qemu when setting up a SCSI disk, due to what was probably an erroneous merge conflict resolution. Malicious guest administrators or in some situations users may be able to write to supposedly read-only di...
How to restart toolstack on host from CLI, and does it have any effect on running jobs
How to restart toolstack on host from CLI, and does it have any effect on running jobs...
Xe-toolstack-restart Fails with Error "Cannot Lock /dev/shm/xe_toolstack_restart.lock. Is an Instance of /opt/xensource/bin/xe-toolstack-restart Running Already? "
When trying to restart toolstack, following error is displayed: "cannot lock /dev/shm/xetoolstackrestart.lock. Is an instance of /opt/xensource/bin/xe-toolstack-restart running already? "...
Unrestricted qemu logging
ISSUE DESCRIPTION When the libxl toolstack launches qemu for HVM guests, it pipes the output of stderr to a file in /var/log/xen. This output is not rate-limited in any way. The guest can easily cause qemu to print messages to stderr, causing this file to become arbitrarily large. IMPACT The disk...
xen-tools -- Unrestricted qemu logging
The Xen Project reports: When the libxl toolstack launches qemu for HVM guests, it pipes the output of stderr to a file in /var/log/xen. This output is not rate-limited in any way. The guest can easily cause qemu to print messages to stderr, causing this file to become arbitrarily large. The disk...
Xen libxl toolstack library denial of service vulnerability
Xen is an open source virtual machine monitor product developed at the University of Cambridge in the United Kingdom. The Xen ibxl toolstack library fails to properly release the file mappings made for the kernel and initial virtual disks when managing multiple domains in the same process, allowi...
CVE-2015-8341
The libxl toolstack library in Xen 4.1.x through 4.6.x does not properly release mappings of files used as kernels and initial ramdisks when managing multiple domains in the same process, which allows attackers to cause a denial of service memory and disk consumption by starting domains...
DEBIAN-CVE-2015-8341
The libxl toolstack library in Xen 4.1.x through 4.6.x does not properly release mappings of files used as kernels and initial ramdisks when managing multiple domains in the same process, which allows attackers to cause a denial of service memory and disk consumption by starting domains...
CVE-2015-8341
The libxl toolstack library in Xen 4.1.x through 4.6.x does not properly release mappings of files used as kernels and initial ramdisks when managing multiple domains in the same process, which allows attackers to cause a denial of service memory and disk consumption by starting domains...
UBUNTU-CVE-2015-8341
The libxl toolstack library in Xen 4.1.x through 4.6.x does not properly release mappings of files used as kernels and initial ramdisks when managing multiple domains in the same process, which allows attackers to cause a denial of service memory and disk consumption by starting domains...
CVE-2015-8341
The libxl toolstack library in Xen 4.1.x through 4.6.x does not properly release mappings of files used as kernels and initial ramdisks when managing multiple domains in the same process, which allows attackers to cause a denial of service memory and disk consumption by starting domains...
Design/Logic Flaw
The libxl toolstack library in Xen 4.1.x through 4.6.x does not properly release mappings of files used as kernels and initial ramdisks when managing multiple domains in the same process, which allows attackers to cause a denial of service memory and disk consumption by starting domains...
CVE-2015-8341
CVE-2015-8341 affects the Xen libxl toolstack in Xen 4.1.x–4.6.x, where mappings for pv kernel/initrd may not be properly released when managing multiple domains in one process. This can allow a local attacker to cause DoS via memory and disk consumption by starting domains. Connected advisories ...
CVE-2015-8341
The libxl toolstack library in Xen 4.1.x through 4.6.x does not properly release mappings of files used as kernels and initial ramdisks when managing multiple domains in the same process, which allows attackers to cause a denial of service memory and disk consumption by starting domains...