CVE-2017-12137

arch/x86/mm.c in Xen allows local PV guest OS users to gain host OS privileges via vectors related to mapgrantref...

CVE-2017-12137

arch/x86/mm.c in Xen allows local PV guest OS users to gain host OS privileges via vectors related to mapgrantref...

CVE-2017-12137

arch/x86/mm.c in Xen allows local PV guest OS users to gain host OS privileges via vectors related to mapgrantref...

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...

Arbitrary Account Password Reset Vulnerability in PV Guard Android APP

PV Guard is a PV monitoring and operation management platform based on big data and knowledge base. The PV Guard Android APP has an arbitrary account password reset vulnerability, which allows attackers to exploit the vulnerability to change the password of the other party's cell phone number onl...

Wheat Home Edition Android App Has Override Access Vulnerability

Wheat Home Edition app is a video surveillance software that provides PV monitoring services. Wheat Home Edition Android App suffers from an override access vulnerability. Attackers can utilize the vulnerability to arbitrarily view sensitive information such as user's cell phone number, email...

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...

Races in the grant table unmap code

ISSUE DESCRIPTION We have discovered two bugs in the code unmapping grant references. When a grant had been mapped twice by a backend domain, and then unmapped by two concurrent unmap calls, the frontend may be informed that the page had no further mappings when the first call completed rather th...

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...

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...

page transfer may allow PV guest to elevate privilege

ISSUE DESCRIPTION Domains controlling other domains are permitted to map pages owned by the domain being controlled. If the controlling domain unmaps such a page without flushing the TLB, and if soon after the domain being controlled transfers this page to another PV domain via GNTTABOPtransfer o...

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...

[SECURITY] [DLA 964-1] xen security update

Package : xen Version : 4.1.6.lts1-8 CVE ID : CVE-2016-9932 CVE-2017-7995 CVE-2017-8903 CVE-2017-8904 CVE-2017-8905 Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2016-9932 XSA-200...

Fedora 25 : xen (2017-5ae70ac6a5)

xen: various flaws 1447345 x86: 64bit PV guest breakout via pagetable use-after-mode-change XSA-213 grant transfer allows PV guest to elevate privileges XSA-214 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable...

CVE-2017-8904

Xen through 4.8.x mishandles the "contains segment descriptors" property during GNTTABOPtransfer aka guest transfer operations, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-214...

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...

Code injection

Xen through 4.6.x on 64-bit platforms mishandles a failsafe callback, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-215...

CVE-2017-8904

Xen through 4.8.x mishandles the "contains segment descriptors" property during GNTTABOPtransfer aka guest transfer operations, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-214...

Code injection

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...

Cross site request forgery (csrf)

Xen through 4.8.x mishandles the "contains segment descriptors" property during GNTTABOPtransfer aka guest transfer operations, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-214...