stale P2M mappings due to insufficient error checking

ISSUE DESCRIPTION Certain actions require removing pages from a guest's P2M Physical-to-Machine mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation to replace a large mapping with individual smaller ones. If...

x86: insufficient reference counts during shadow emulation

ISSUE DESCRIPTION When using shadow paging, writes to guest pagetables must be trapped and emulated, so the shadows can be suitably adjusted as well. When emulating the write, Xen maps the guests pagetables to make the final adjustment and leave the guest's view of its state consistent. However,...

blkif responses leak backend stack data

ISSUE DESCRIPTION The block interface response structure has some discontiguous fields. Certain backends populate the structure fields of an otherwise uninitialized instance of this structure on their stacks, leaking data through the internal or trailing padding field. IMPACT A malicious...

UBUNTU-CVE-2017-9373

Memory leak in QEMU aka Quick Emulator, when built with IDE AHCI Emulation support, allows local guest OS privileged users to cause a denial of service memory consumption by repeatedly hot-unplugging the AHCI device...

Debian DLA-964-1 : xen security update

Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems : CVE-2016-9932 XSA-200 CMPXCHG8B emulation allows local HVM guest OS users to obtain sensitive information from host stack memory. CVE-2017-7995...

ALPINE-CVE-2017-8903

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213...

UBUNTU-CVE-2017-8903

Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213...

x86: 64bit PV guest breakout via pagetable use-after-mode-change

ISSUE DESCRIPTION 64-bit PV guests typically use separate root page tables for their kernel and user modes. Hypercalls are accessible to guest kernel context only, which certain hypercall handlers make assumptions on. The IRET hypercall replacing the identically name CPU instruction is used by...

PT-2017-18056

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.5.x Description The issue arises from inadequate access permission checks for MMIO ranges in Xen PV guests, specifically an error in the get user function. This allows unauthorized reads of host PCI device space memory,...

CVE-2016-10322

Synology Photo Station before 6.3-2958 allows remote authenticated guest users to execute arbitrary commands via shell metacharacters in the X-Forwarded-For HTTP header to photo/login.php...

xenstore denial of service via repeated update

ISSUE DESCRIPTION xenstored supports transactions, such that if writes which would invalidate assumptions of a transaction occur, the entire transaction fails. Typical response on a failed transaction is to simply retry the transaction until it succeeds. Unprivileged domains may issue writes to...

xen-tools -- xenstore denial of service via repeated update

The Xen Project reports: Unprivileged guests may be able to stall progress of the control domain or driver domain, possibly leading to a Denial of Service DoS of the entire host...

DEBIAN-CVE-2017-5856

Memory leak in the megasashandledcmd function in hw/scsi/megasas.c in QEMU aka Quick Emulator allows local guest OS privileged users to cause a denial of service host memory consumption via MegaRAID Firmware Interface MFI commands with the sglist size set to a value over 2 Gb...

ALPINE-CVE-2017-5578

Memory leak in the virtiogpuresourceattachbacking function in hw/display/virtio-gpu.c in QEMU aka Quick Emulator allows local guest OS users to cause a denial of service host memory consumption via a large number of VIRTIOGPUCMDRESOURCEATTACHBACKING commands...

DEBIAN-CVE-2017-5578

Memory leak in the virtiogpuresourceattachbacking function in hw/display/virtio-gpu.c in QEMU aka Quick Emulator allows local guest OS users to cause a denial of service host memory consumption via a large number of VIRTIOGPUCMDRESOURCEATTACHBACKING commands...

DEBIAN-CVE-2017-6317

Memory leak in the addshaderprogram function in vrendrenderer.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service host memory consumption via vectors involving the sprog variable...

UBUNTU-CVE-2017-5526

Memory leak in hw/audio/es1370.c in QEMU aka Quick Emulator allows local guest OS privileged users to cause a denial of service host memory consumption and QEMU process crash via a large number of device unplug operations...

UBUNTU-CVE-2017-5578

Memory leak in the virtiogpuresourceattachbacking function in hw/display/virtio-gpu.c in QEMU aka Quick Emulator allows local guest OS users to cause a denial of service host memory consumption via a large number of VIRTIOGPUCMDRESOURCEATTACHBACKING commands...

Cirrus VGA Heap overflow via display refresh

ISSUE DESCRIPTION When a graphics update command gets passed to the VGA emulator, there are 3 possible modes that can be used to update the display: blank - Clears the display text - Treats the display as showing text graph - Treats the display as showing graphics After the display geometry gets...

BistroStays 3.0 - guests SQL Injection

BistroStays 3.0 - guests SQL Injection Exploit Title: BistroStays - Vacation Rental Software v3.0 - SQL Injection Google Dork: N/A Date: 09.03.2017 Vendor Homepage: https://www.ncrypted.net/ Software: https://www.ncrypted.net/bistrostays Demo: http://demo.ncryptedprojects.com/bistrostaysv3/...