OracleVM 3.2 : xen (OVMSA-2017-0159)

The remote OracleVM system is missing necessary patches to address critical security updates : - The code of OVM3.2.9 is quite old, there is no getpage/putpage pair to protect the ownership and references of page table page which is mapped in emulatemapdest. This patch fix it by adding getpage in...

Missing NUMA node parameter verification

ISSUE DESCRIPTION The function allocheappages allows callers to specify the first NUMA node that should be used for allocations through the memflags parameter; the node is extracted using the MEMFgetnode macro. While the function checks to see if the special constant NUMANONODE is specified, it...

Pandavirtualization: Exploiting the Xen hypervisor

Posted by Jann Horn, Project Zero On 2017-03-14, I reported a bug to Xen's security team that permits an attacker with control over the kernel of a paravirtualized x86-64 Xen guest to break out of the hypervisor and gain full control over the machine's physical memory. The Xen Project publicly...

SUSE SLES11 Security Update : xen (SUSE-SU-2015:1952-1)

xen was updated to fix eight 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...

FreeBSD : xen-kernel -- some pmu and profiling hypercalls log without rate limiting (e4848ca4-8820-11e5-ab94-002590263bf5)

The Xen Project reports : HYPERCALLxenoprofop and HYPERVISORxenpmuop log some errors and attempts at invalid operations. These log messages are not rate-limited, even though they can be triggered by guests. A malicious guest could cause repeated logging to the hypervisor console, leading to a...

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...

CVE-2015-7971

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted 1 HYPERCALLxenoprofop hypercalls, which are not properly handled in the doxenoprofop...

DEBIAN-CVE-2015-7971

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted 1 HYPERCALLxenoprofop hypercalls, which are not properly handled in the doxenoprofop...

UBUNTU-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...

Design/Logic Flaw

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted 1 HYPERCALLxenoprofop hypercalls, which are not properly handled in the doxenoprofop...

Design/Logic Flaw

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

CVE-2015-7813

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

UBUNTU-CVE-2015-7971

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted 1 HYPERCALLxenoprofop hypercalls, which are not properly handled in the doxenoprofop...

CVE-2015-7813

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

CVE-2015-7971

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted 1 HYPERCALLxenoprofop hypercalls, which are not properly handled in the doxenoprofop...

DEBIAN-CVE-2015-7813

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

CVE-2015-7813

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

UBUNTU-CVE-2015-7813

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

CVE-2015-7971

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted 1 HYPERCALLxenoprofop hypercalls, which are not properly handled in the doxenoprofop...

CVE-2015-7813

CVE-2015-7813 affects Xen 4.4.x–4.6.x on ARM; a local guest can trigger a DoS by unchecked printk messages when unimplemented hypercalls are reported via HYPERVISOR_physdev_op or HYPERVISOR_hvm_op, due to improper handling in arch/arm/physdev.c and arch/arm/hvm.c. Remediation in connected advisor...