PT-2017-11604

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.9 Description The issue is related to a race condition in the grant-table feature, which can lead to a double free. This can cause a denial of service due to memory consumption, or potentially allow attackers to obtain...

CVE-2017-10921: Improper Restriction of Operations within the Bounds of a Memory Buffer

The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAPdevicemap and GNTMAPhostmap mapping, which allows guest OS users to cause a denial of service count mismanagement and memory corruption or obtain privileged host OS access, aka XSA-224 bug 2...

CVE-2017-10920: Improper Restriction of Operations within the Bounds of a Memory Buffer

The grant-table feature in Xen through 4.8.x mishandles a GNTMAPdevicemap and GNTMAPhostmap mapping, when followed by only a GNTMAPhostmap unmapping, which allows guest OS users to cause a denial of service count mismanagement and memory corruption or obtain privileged host OS access, aka XSA-224...

CVE-2017-10913: Undefined Security Weakness

The grant-table feature in Xen through 4.8.x provides false mapping information in certain cases of concurrent unmap calls, which allows backend attackers to obtain sensitive information or gain privileges, aka XSA-218 bug 1...

PT-2017-2430

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.9 Description The grant-table feature in Xen provides false mapping information in certain cases of concurrent unmap calls. This issue allows backend attackers to obtain sensitive information or gain privileges...

CVE-2017-10914: Concurrent Execution using Shared Resource with Improper Synchronization

The grant-table feature in Xen through 4.8.x has a race condition leading to a double free, which allows guest OS users to cause a denial of service memory consumption, or possibly obtain sensitive information or gain privileges, aka XSA-218 bug 2...

Xen grant-table feature race condition vulnerability

Xen is an open source virtual machine monitor product developed at the University of Cambridge in the United Kingdom. A competitive condition vulnerability exists in the Xengrant-table feature that allows attackers to conduct denial-of-service attacks that can be exploited to crash a system...

PT-2017-2434

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.9 Description The issue is related to the grant-table feature, which does not ensure sufficient type counts for a GNTMAP device map and GNTMAP host map mapping. This allows guest OS users to cause a denial of service,...

Citrix XenServer Multiple Vulnerabilities (CTX224740)

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 that causes grant table operations to fail due to improper handling of reference counts. An unauthenticated, remote attacker can...

grant table operations mishandle reference counts

ISSUE DESCRIPTION We have discovered a number of bugs in the code mapping and unmapping grant references. If a grant is mapped with both the GNTMAPdevicemap and GNTMAPhostmap flags, but unmapped only with hostmap, the devicemap portion remains but the page reference counts are lowered as though i...

Xen Code Execution Vulnerability

Xen is an open source virtual machine monitor product developed at the University of Cambridge, UK. The product enables different and incompatible operating systems to run on the same computer and supports runtime migration to ensure uptime and avoid downtime. A security vulnerability exists in X...

DEBIAN-CVE-2015-4163

GNTTABOPswapgrantref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service NULL pointer dereference via a hypercall without a GNTTABOPsetuptable or GNTTABOPsetversion...

UBUNTU-CVE-2015-4163

GNTTABOPswapgrantref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service NULL pointer dereference via a hypercall without a GNTTABOPsetuptable or GNTTABOPsetversion...

CVE-2015-4163

GNTTABOPswapgrantref in Xen 4.2 through 4.5 does not check the grant table operation version, which allows local guest domains to cause a denial of service NULL pointer dereference via a hypercall without a GNTTABOPsetuptable or GNTTABOPsetversion...

xen-kernel -- GNTTABOP_swap_grant_ref operation misbehavior

The Xen Project reports: With the introduction of version 2 grant table operations, a version check became necessary for most grant table related hypercalls. The GNTTABOPswapgrantref call was lacking such a check. As a result, the subsequent code behaved as if version 2 was in use, when a guest...

UBUNTU-CVE-2014-4022

The allocdomainstruct function in arch/arm/domain.c in Xen 4.4.x, when running on an ARM platform, does not properly initialize the structure containing the grant table pages for a domain, which allows local guest administrators to obtain sensitive information via the GNTTABOPsetuptable...

information leak via gnttab_setup_table on ARM

ISSUE DESCRIPTION When initialising an internal data structure on ARM platform Xen was not correctly initialising the memory containing the list of a domain's grant table pages. This list is returned by the GNTTABOPsetuptable subhypercall, leading to an information leak. IMPACT Malicious guest...

openSUSE Security Update : XEN (openSUSE-SU-2012:1572-1)

This security update of XEN fixes various bugs and security issues. - Upstream patch 26088-xend-xml-filesize-check.patch - bnc787163 - CVE-2012-4544: xen: Domain builder Out-of- memory due to malicious kernel/ramdisk XSA 25 CVE-2012-4544-xsa25.patch - bnc779212 - CVE-2012-4411: XEN / qemu: guest...

kernel: xen: Lock order reversal between page allocation and grant table locks

Xen before 4.1.x, 4.2.x, and 4.3.x does not take the pagealloclock and granttable.lock in the same order, which allows local guest administrators with access to multiple vcpus to cause a denial of service host deadlock via unspecified vectors...

SuSE 11.2 Security Update : Xen (SAT Patch Number 8577)

Xen has been updated to fix a security issue and a bug : - XSA-73: A lock order reversal between page allocation and grant table locks could lead to host crashes or even host code execution. CVE-2013-4494 A non-security bug has also been fixed : - It is possible to start a VM twice on the same no...