200 matches found
CVE-2017-12188
arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service incorrect index...
UBUNTU-CVE-2017-12188
arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service incorrect index...
PT-2017-12392 · Linux +4 · Linux Kernel +4
Name of the Vulnerable Software and Affected Versions: Linux kernel versions through 4.13.5 Description: The issue arises when nested virtualisation is used, and the Linux kernel does not properly traverse guest pagetable entries to resolve a guest virtual address. This allows L1 guest OS users t...
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...
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...
Xen 64bit PV Guest - pagetable use-after-type-change Breakout Vulnerability
Exploit for linux platform in category local exploits Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1231 This is a bug in Xen that permits an attacker with control over the kernel of a 64bit X86 PV guest to write arbitrary entries into a live top-level pagetable. To prevent PV...
Xen 64bit PV Guest - pagetable use-after-type-change Breakout
Xen 64bit PV Guest - pagetable use-after-type-change Breakout Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1231 This is a bug in Xen that permits an attacker with control over the kernel of a 64bit X86 PV guest to write arbitrary entries into a live top-level pagetable. To...
Xen 64bit PV Guest - pagetable use-after-type-change Breakout
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1231 This is a bug in Xen that permits an attacker with control over the kernel of a 64bit X86 PV guest to write arbitrary entries into a live top-level pagetable. To prevent PV guests from doing things like mapping live pagetables...
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...
Updated xen packages fix security vulnerability
This xen update is based on upstream 4.5.5 maintenance release, and fixes the following security issues: The qemu implementation in libvirt before 1.3.0 and Xen allows local guest OS users to cause a denial of service host disk consumption by writing to stdout or stderr CVE-2014-3672 The xrstor...
FreeBSD : xen-kernel -- x86: Disallow L3 recursive pagetable for 32-bit PV guests (45ca25b5-ba4d-11e6-ae1b-002590263bf5)
The Xen Project reports : On real hardware, a 32-bit PAE guest must leave the USER and RW bit clear in L3 pagetable entries, but the pagetable walk behaves as if they were set. The L3 entries are cached in processor registers, and don't actually form part of the pagewalk. When running a 32-bit PV...
kernel security and bug fix update
2.6.32-642.11.1 - mm close FOLL MAPPRIVATE race Larry Woodman 1385116 1385117 CVE-2016-5195 2.6.32-642.10.1 - scsi fnic: Fix to cleanup aborted IO to avoid device being offlined by mid-layer Maurizio Lombardi 1382620 1341298 2.6.32-642.9.1 - net vlan: Fix FCOEMTU support Maurizio Lombardi 1381592...
Fedora 25 : xen (2016-1d8429b89f)
fix build problem with glibc 2.24 x86: Disallow L3 recursive pagetable for 32-bit PV guests XSA-185, CVE-2016-7092 x86: Mishandling of instruction pointer truncation during emulation XSA-186, CVE-2016-7093 x86 HVM: Overflow of shctxt-segreg XSA-187, CVE-2016-7094 pandoc documentation has dependen...
Fedora 23 : xen (2016-1c3374bcb9)
x86: Disallow L3 recursive pagetable for 32-bit PV guests XSA-185, CVE-2016-7092 1374470 x86: Mishandling of instruction pointer truncation during emulation XSA-186, CVE-2016-7093 1374471 x86 HVM: Overflow of shctxt-segreg XSA-187, CVE-2016-7094 1374473 Note that Tenable Network Security has...
DEBIAN-CVE-2016-7094
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update...
Buffer overflow
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update...
CVE-2016-7094
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update...
UBUNTU-CVE-2016-7094
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update...
