CVE-2016-10025

VMFUNC emulation in Xen 4.6.x through 4.8.x on x86 systems using AMD virtualization extensions aka SVM allows local HVM guest OS users to cause a denial of service hypervisor crash by leveraging a missing NULL pointer check...

x86: missing NULL pointer check in VMFUNC emulation

ISSUE DESCRIPTION When support for the Intel VMX VMFUNC leaf 0 was added, a new optional function pointer hvmemulvmfunc was added to the hvmemulateops table. As is intended, that new function pointer is NULL on non-VMX hardware, including AMD SVM hardware. However at a call site, the necessary NU...

Researchers Question Security in AMD's Upcoming Zen Chips

As more computing heads to the clouds, security researchers are questioning the security of virtual machine control panels called hypervisors. One of the first hardware-based solutions to address these concerns will be deployed by chip manufacturer AMD, called Secure Encrypted Virtualization. The...

FreeBSD : xen-kernel -- x86 null segments not always treated as unusable (50ac2e96-ba4d-11e6-ae1b-002590263bf5)

The Xen Project reports : The Xen x86 emulator erroneously failed to consider the unusability of segments when performing memory accesses. The intended behaviour is as follows: The user data segment %ds, %es, %fs and %gs selectors may be NULL in 32-bit to prevent access. In 64-bit, NULL has a...

CVE-2016-9378

Xen 4.5.x through 4.7.x on AMD systems without the NRip feature, when emulating instructions that generate software interrupts, allows local HVM guest OS users to cause a denial of service guest crash by leveraging an incorrect choice for software interrupt delivery...

CVE-2016-9377

Xen 4.5.x through 4.7.x on AMD systems without the NRip feature, when emulating instructions that generate software interrupts, allows local HVM guest OS users to cause a denial of service guest crash by leveraging IDT entry miscalculation...

x86 software interrupt injection mis-handled

ISSUE DESCRIPTION There are two closely-related bugs. When Xen emulates instructions which generate software interrupts it needs to perform a privilege check involving an IDT lookup. This check is sometimes erroneously conducted as if the IDT had the format for a 32-bit guest, when in fact it is ...

x86 task switch to VM86 mode mis-handled

ISSUE DESCRIPTION LDTR, just like TR, is purely a protected mode facility. Hence even when switching to a VM86 mode task, LDTR loading needs to follow protected mode semantics. This was violated by the code. IMPACT On SVM AMD hardware: a malicious unprivileged guest process can escalate its...

x86 null segments not always treated as unusable

ISSUE DESCRIPTION The Xen x86 emulator erroneously failed to consider the unusability of segments when performing memory accesses. The intended behaviour is as follows: The user data segment %ds, %es, %fs and %gs selectors may be NULL in 32-bit to prevent access. In 64-bit, NULL has a special...

xen-kernel -- x86 null segments not always treated as unusable

The Xen Project reports: The Xen x86 emulator erroneously failed to consider the unusability of segments when performing memory accesses. The intended behaviour is as follows: The user data segment %ds, %es, %fs and %gs selectors may be NULL in 32-bit to prevent access. In 64-bit, NULL has a...

Debian DLA-698-1 : qemu security update

Several vulnerabilities were discovered in qemu, a fast processor emulator. The Common Vulnerabilities and Exposures project identifies the following problems : CVE-2016-7909 Quick EmulatorQemu built with the AMD PC-Net II emulator support is vulnerable to an infinite loop issue. It could occur...

Debian DLA-689-1 : qemu-kvm security update

Multiple vulnerabilities have been discovered in qemu-kvm, a full virtualization solution on x86 hardware based on Quick EmulatorQemu. The Common Vulnerabilities and Exposures project identifies the following problems : CVE-2016-7909 Quick EmulatorQemu built with the AMD PC-Net II emulator suppor...

[SECURITY] [DLA 689-1] qemu-kvm security update

Package : qemu-kvm Version : 1.1.2+dfsg-6+deb7u18 CVE ID : CVE-2016-7909 CVE-2016-8909 CVE-2016-8910 Debian Bug : 839834 841950 841955 842455 842463 Multiple vulnerabilities have been discovered in qemu-kvm, a full virtualization solution on x86 hardware based on Quick EmulatorQemu. The Common...

openSUSE Security Update : Chromium (openSUSE-2016-1080)

Chromium was updated to 53.0.2785.101 to fix a number of security issues and bugs. The following vulnerabilities were fixed: boo996648 - CVE-2016-5147: Universal XSS in Blink. - CVE-2016-5148: Universal XSS in Blink. - CVE-2016-5149: Script injection in extensions. - CVE-2016-5150: Use after free...

Mac OS X 10.11.x < 10.11.5 Multiple Vulnerabilities

Binary data 9392.prm...

The vulnerability of the Mac OS X operating system allows a perpetrator to execute arbitrary code in privileged context or cause a service failure.

The vulnerability of the AMD subsystem in the Mac OS X operating system arises due to buffer overflow. Exploiting this vulnerability allows a malicious actor to execute arbitrary code in privileged context, or trigger a service failure memory corruption through a specially created application...

The vulnerability of the Mac OS X operating system allows a perpetrator to gain access to protected information in the kernel’s memory.

The vulnerability of the AMD subsystem of the Mac OS X operating system is related to the lack of protection for system data. Exploiting this vulnerability allows a malicious actor, operating remotely, to gain access to protected information in the kernel’s memory through a specially created...

Apple OS X El Capitan AMD Arbitrary Code Execution Vulnerability

Apple OS X El Capitan is an operating system on Apple devices. A security vulnerability in AMD in Apple OS X El Capitan allows attackers to exploit the vulnerability to execute arbitrary code with kernel privileges...

CVE-2016-1792

The AMD subsystem in Apple OS X before 10.11.5 allows attackers to execute arbitrary code in a privileged context or cause a denial of service memory corruption via a crafted app...

Memory corruption

The AMD subsystem in Apple OS X before 10.11.5 allows attackers to execute arbitrary code in a privileged context or cause a denial of service memory corruption via a crafted app...