DEBIAN-CVE-2017-12134

The xenbiovecphysmergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability...

DEBIAN-CVE-2017-12136

Race condition in the grant table code in Xen 4.6.x through 4.9.x allows local guest OS administrators to cause a denial of service free list corruption and host crash or gain privileges on the host via vectors involving maptrack free list handling...

x86: PV privilege escalation via map_grant_ref

ISSUE DESCRIPTION When mapping a grant reference, a guest must inform Xen of where it would like the grant mapped. For PV guests, this is done by nominating an existing linear address, or an L1 pagetable entry, to be altered. Neither of these PV paths check for alignment of the passed parameter...

Russian Hackers Spying on VIP Hotel Guests Using Leaked NSA Tool

By Waqas Fancy Bear 1 or APT28 2 is a Russia hacker This is a post from HackRead.com Read the original post: Russian Hackers Spying on VIP Hotel Guests Using Leaked NSA Tool...

Cyberspies Are Using Leaked NSA Hacking Tools to Spy On Hotels Guests

An infamous Russian-linked cyber-espionage group has been found re-using the same leaked NSA hacking tool that was deployed in the WannaCry and NotPetya outbreaks—this time to target Wi-Fi networks to spy on hotel guests in several European countries. Security researchers at FireEye have uncovere...

Qemu: virtio: null pointer dereference in virtqueu_map_desc

The virtqueuemapdesc function in hw/virtio/virtio.c in QEMU aka Quick Emulator allows local guest OS administrators to cause a denial of service NULL pointer dereference and QEMU process crash via a large I/O descriptor buffer length value...

CVE-2017-10921

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. Mitigatio...

x86: PKRU and BND* leakage between vCPU-s

ISSUE DESCRIPTION Memory Protection Extensions MPX and Protection Key PKU are features in newer processors, whose state is intended to be per-thread and context switched along with all other XSAVE state. Xen's vCPU context switch code would save and restore the state only if the guest had set the...

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...

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...

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...

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...

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...

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...

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...