ALPINE-CVE-2018-7540

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service host OS CPU hang via non-preemptable L3/L4 pagetable freeing...

CVE-2018-7540

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service host OS CPU hang via non-preemptable L3/L4 pagetable freeing...

CVE-2018-7540

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service host OS CPU hang via non-preemptable L3/L4 pagetable freeing...

Xen: unbounded recursion in pagetable de-typing(CVE-2017-15595)

Xen allows pagetables of the same level to map each other as readonly in PV domains. This is useful if a guest wants to use the self-referential pagetable trick for easy access to pagetables by mapped virtual address. When cleaning up a pagetable after the last typed reference to it has been...

SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2017:2864-1)

This update for xen fixes several issues: These security issues were fixed : - CVE-2017-5526: The ES1370 audio device emulation support was vulnerable to a memory leakage issue allowing a privileged user inside the guest to cause a DoS and/or potentially crash the Qemu process on the host...

Xen - Pagetable De-typing Unbounded Recursion

Xen - Pagetable De-typing Unbounded Recursion Xen allows pagetables of the same level to map each other as readonly in PV domains. This is useful if a guest wants to use the self-referential pagetable trick for easy access to pagetables by mapped virtual address. When cleaning up a pagetable afte...

Xen - Pagetable De-typing Unbounded Recursion

Xen allows pagetables of the same level to map each other as readonly in PV domains. This is useful if a guest wants to use the self-referential pagetable trick for easy access to pagetables by mapped virtual address. When cleaning up a pagetable after the last typed reference to it has been...

Xen - Unbounded Recursion in Pagetable De-typing Vulnerability

Exploit for linux platform in category dos / poc Xen allows pagetables of the same level to map each other as readonly in PV domains. This is useful if a guest wants to use the self-referential pagetable trick for easy access to pagetables by mapped virtual address. When cleaning up a pagetable...

x86: Incorrect handling of self-linear shadow mappings with translated guests

ISSUE DESCRIPTION The shadow pagetable code uses linear mappings to inspect and modify the shadow pagetables. A linear mapping which points back to itself is known as self-linear. For translated guests, the shadow linear mappings being in a separate address space are not intended to be self-linea...

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...

DEBIAN-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

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...

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...

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...