CVE-2017-10923

CVE-2017-10923 affects the Xen hypervisor (Xen 4.8.x and earlier). The root cause is a missing validation of the vCPU array index when an SGI is sent, which can allow a guest OS user to trigger a denial of service resulting in a hypervisor crash (XSA-225). The connected documents describe this as...

CVE-2017-10923

Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service hypervisor crash, aka XSA-225...

CVE-2017-10916

CVE-2017-10916 is an information-leak flaw in the Xen vCPU context-switch handling of Memory Protection Extensions (MPX) and Protection Key (PKU). The issue enables guest OS users to potentially bypass ASLR and related protections. Public advisories (Debian, SUSE, Fedora/OpenVAS/NASL) associate t...

CVE-2017-10916

The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions MPX and Protection Key PKU features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka XSA-220...

CVE-2017-10916

The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions MPX and Protection Key PKU features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka XSA-220...

CVE-2017-10923

Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service hypervisor crash, aka XSA-225...

CVE-2017-10923: Improper Input Validation

Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service hypervisor crash, aka XSA-225...

CVE-2017-10916: Exposure of Sensitive Information to an Unauthorized Actor

The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions MPX and Protection Key PKU features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka XSA-220...

PT-2017-11606

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.9 Description The issue arises from improper interaction between the vCPU context-switch implementation and the Memory Protection Extensions MPX and Protection Key PKU features in Xen. This interaction makes it easier f...

PT-2017-11610

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.9 Description The issue allows guest OS users to cause a denial of service, resulting in a hypervisor crash, due to the lack of validation of a vCPU array index when sending an SGI. Recommendations For versions prior to...

Ubuntu 16.10 : linux vulnerabilities (USN-3190-1)

Mikulas Patocka discovered that the asynchronous multibuffer cryptographic daemon mcryptd in the Linux kernel did not properly handle being invoked with incompatible algorithms. A local attacker could use this to cause a denial of service system crash. CVE-2016-10147 It was discovered that a...

USN-3190-1: Linux kernel vulnerabilities

Mikulas Patocka discovered that the asynchronous multibuffer cryptographic daemon mcryptd in the Linux kernel did not properly handle being invoked with incompatible algorithms. A local attacker could use this to cause a denial of service system crash. CVE-2016-10147 It was discovered that a...

libvirt security, bug fix, and enhancement update

2.0.0-10 - virtlogd: Don't stop or restart along with libvirtd rhbz1372576 2.0.0-9 - Add helper for removing transient definition rhbz1368774 - qemu: Remove stale transient def when migration fails rhbz1368774 - qemu: Don't use query-migrate on destination rhbz1374613 - conf: allow hotplugging...

Linux Privilege Escalation

A local user can increase their privileges by passing a parameter vcpuid with a high value...

UBUNTU-CVE-2016-3713

The msrmtrrvalid function in arch/x86/kvm/mtrr.c in the Linux kernel before 4.6.1 supports MSR 0x2f8, which allows guest OS users to read or write to the kvmarchvcpu data structure, and consequently obtain sensitive information or cause a denial of service system crash, via a crafted ioctl call...

PT-2016-5673

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 4.6.1 Description The issue allows guest OS users to read or write to the kvm arch vcpu data structure, potentially obtaining sensitive information or causing a denial of service system crash. This can be achieve...

FreeBSD : xen-kernel -- leak of main per-domain vcpu pointer array (fc1f8795-881d-11e5-ab94-002590263bf5)

The Xen Project reports : A domain's primary array of vcpu pointers can be allocated by a toolstack exactly once in the lifetime of a domain via the XENDOMCTLmaxvcpus hypercall. This array is leaked on domain teardown. This memory leak could -- over time -- exhaust the host's memory. A domain giv...

Xen has multiple memory leak vulnerabilities

Xen is an open source virtual machine monitor product developed at the University of Cambridge, UK. The product enables different and incompatible operating systems to run on the same computer and supports runtime migration to ensure uptime and avoid downtime. Multiple memory leak vulnerabilities...

SUSE SLED11 / SLES11 Security Update : xen (SUSE-SU-2015:1853-1)

xen was updated to fix nine security issues. These security issues were fixed : - CVE-2015-4037: The slirpsmb function in net/slirp.c created temporary files with predictable names, which allowed local users to cause a denial of service instantiation failure by creating /tmp/qemu-smb.- files befo...

DEBIAN-CVE-2015-7969

Multiple memory leaks in Xen 4.0 through 4.6.x allow local guest administrators or domains with certain permission to cause a denial of service memory consumption via a large number of "teardowns" of domains with the vcpu pointer array allocated using the 1 XENDOMCTLmaxvcpus hypercall or the...