CVE-2018-10472

Xen CVE-2018-10472 affects Xen up to 4.10.x. In certain configurations, an x86 HVM guest OS user could read arbitrary dom0 files by live-inserting a CDROM via QMP and targeting the CDROM as the backing file of a snapshot. This allows partial information disclosure from dom0 to the guest. The desc...

CVE-2018-10472

An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users in certain configurations to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot...

CVE-2018-10472

An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users in certain configurations to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot...

Information leak via crafted user-supplied CDROM

ISSUE DESCRIPTION QEMU handles many different file formats for virtual disks e.g., raw, qcow2, vhd, &c. Some of these formats are "snapshots" that specify "patches" to an alternate disk image, whose filename is included in the snapshot file. When qemu is given a disk but the type is not specified...

cxenstored: Race in domain cleanup

ISSUE DESCRIPTION When shutting down a VM with a stubdomain, a race in cxenstored may cause a double-free. IMPACT The xenstored daemon may crash, resulting in a DoS of any parts of the system relying on it including domain creation / destruction, ballooning, device changes, etc. VULNERABLE SYSTEM...

linux: Fix Xen block IO merge-ability calculation

ISSUE DESCRIPTION The block layer in Linux may choose to merge adjacent block IO requests. When Linux is running as a Xen guest, the default merging algorithm is replaced with a Xen-specific one. When Linux is running as an x86 PV guest, some BIO's are erroneously merged, corrupting the data stre...

Capturing a continuous network trace( tcpdump ) on XenServer without filling the dom0

In certain situation, we are not sure when will the issue be reproduced and need to keep the network capture running. If the capture is run directly, it may fill up the dom0 filesystem and can crash the XenServer Host...

Linux DoS Xen 4.2.0 2012-5525

This module causes a hypervisor crash in Xen 4.2.0 when invoked from a paravirtualized VM, including from dom0. Successfully tested on Debian 7 3.2.0-4-amd64 with Xen 4.2.0. This module requires Metasploit: https://metasploit.com/download Current source:...

Fedora 22 : xen-4.5.1-5.fc22 (2015-12657)

QEMU heap overflow flaw while processing certain ATAPI commands. XSA-138, CVE-2015-5154 1247142 try again to fix xen-qemu-dom0-disk-backend.service 1242246 correct qemu location in xen-qemu-dom0-disk-backend.service 1242246, rebuild efi grub.cfg if it is present 1239309, re-enable remus by buildi...

xen-kernel and xen-tools -- Long latency MMIO mapping operations are not preemptible

The Xen Project reports: The XENDOMCTLmemorymapping hypercall allows long running operations without implementing preemption. This hypercall is used by the device model as part of the emulation associated with configuration of PCI devices passed through to HVM guests and is therefore indirectly...

OracleVM 2.1 : kernel (OVMSA-2009-0023)

The remote OracleVM system is missing necessary patches to address critical security updates : - backport for online resize of blockdev orabug 8585251 rh bugz 444964 - CVE-2009-2692 - net make socksendpage use kernelsendpage Jiri Pirko 517445 516955 - CVE-2009-2698 - net prevent null pointer...

openSUSE Security Update : xen (openSUSE-SU-2013:1953-1)

Xen was updated to 4.2.3 c/s 26170 to fix various bugs and security issues. Following issues were fixed : - bnc845520 - CVE-2013-4416: xen: ocaml xenstored mishandles oversized message replies - bnc833483 - Boot Failure with xen kernel in UEFI mode with error 'No memory for trampoline' -...

Linux netback crash trying to disable due to malformed packet

ISSUE DESCRIPTION When Linux's netback sees a malformed packet, it tries to disable the interface which serves the misbehaving frontend. This involves taking a mutex, which might sleep. But in recent versions of Linux the guest transmit path is handled by NAPI in softirq context, where sleeping i...

grant table hypercall acquire/release imbalance

ISSUE DESCRIPTION When releasing a non-v1 non-transitive grant after doing a grant copy operation, Xen incorrectly recurses as if for a transitive grant and releases an unrelated grant reference. IMPACT A malicious guest administrator can cause undefined behaviour; depending on the dom0 kernel a...

CentOS 5 : xen (CESA-2013:0241)

Updated xen packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is availab...

RHEL 5 : xen (RHSA-2013:0241)

Updated xen packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is availab...

Moderate: Red Hat Security Advisory: xen security update

Updated xen packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is availab...

CentOS Update for kernel CESA-2012:1323 centos5

Check for the Version of kernel OpenVAS Vulnerability Test CentOS Update for kernel CESA-2012:1323 centos5 Authors: System Generated Check Copyright: Copyright c 2012 Greenbone Networks GmbH, http://www.greenbone.net This program is free software; you can redistribute it and/or modify it under th...

Fedora 16 : xen-4.1.3-2.fc16 (2012-13443)

a malicious 64-bit PV guest can crash the dom0 XSA-12, CVE-2012-3494 854585 a malicious crash might be able to crash the dom0 or escalate privileges XSA-13, CVE-2012-3495 854589 a malicious PV guest can crash the dom0 XSA-14, CVE-2012-3496 854590 a malicious HVM guest can crash the dom0 and might...

Virtual Machine Escape Exploit Targets Xen

Details of a dangerous virtual machine escape exploit were revealed Wednesday by French research outfit VUPEN Security. The attack exploits a recently reported vulnerability in Xen hypervisors and allows an attacker within a guest virtual machine to escape to the host and execute code. Virtual...