CVE-2014-7156

The x86emulate function in arch/x86/x86emulate/x86emulate.c in Xen 3.3.x through 4.4.x does not check the supervisor mode permissions for instructions that generate software interrupts, which allows local HVM guest users to cause a denial of service guest crash via unspecified vectors...

PT-2014-7823

Name of the Vulnerable Software and Affected Versions Xen versions 4.1 through 4.4.x Description The issue is related to the hvm msr read intercept function in the arch/x86/hvm/hvm.c file, which improperly handles the MSR range for x2APIC emulation. This allows local HVM guests to cause a denial ...

PT-2014-7811

Name of the Vulnerable Software and Affected Versions Xen versions 3.3.x through 4.4.x Description The issue is related to the x86 emulate function in Xen, which does not properly check supervisor mode permissions for certain instructions. This allows local HVM guest users to cause a denial of...

CVE-2014-7156: Undefined Security Weakness

The x86emulate function in arch/x86/x86emulate/x86emulate.c in Xen 3.3.x through 4.4.x does not check the supervisor mode permissions for instructions that generate software interrupts, which allows local HVM guest users to cause a denial of service guest crash via unspecified vectors...

Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation

ISSUE DESCRIPTION The emulation of the instructions HLT, LGDT, LIDT, and LMSW fails to perform supervisor mode permission checks. However these instructions are not usually handled by the emulator. Exceptions to this are - when the instruction's memory operand if any lives in emulated or passed...

Race condition in HVMOP_track_dirty_vram

ISSUE DESCRIPTION The routine controlling the setup of dirty video RAM tracking latches the value of a pointer before taking the respective guarding lock, thus making it possible for a stale pointer to be used by the time the lock got acquired and the pointer gets dereferenced. The hypercall...

Missing privilege level checks in x86 emulation of software interrupts

ISSUE DESCRIPTION The emulation of instructions which generate software interrupts fails to perform supervisor mode permission checks. However these instructions are not usually handled by the emulator. Exceptions to this are - when a memory operand implicit for the affected instructions lives in...

CVE-2014-5146

Certain MMU virtualization operations in Xen 4.2.x through 4.4.x before the xsa97-hap patch, when using Hardware Assisted Paging HAP, are not preemptible, which allows local HVM guest to cause a denial of service vcpu consumption by invoking these operations, which process every page assigned to ...

CVE-2014-5149

Certain MMU virtualization operations in Xen 4.2.x through 4.4.x, when using shadow pagetables, are not preemptible, which allows local HVM guest to cause a denial of service vcpu consumption by invoking these operations, which process every page assigned to a guest, a different vulnerability tha...

DEBIAN-CVE-2014-5146

Certain MMU virtualization operations in Xen 4.2.x through 4.4.x before the xsa97-hap patch, when using Hardware Assisted Paging HAP, are not preemptible, which allows local HVM guest to cause a denial of service vcpu consumption by invoking these operations, which process every page assigned to ...

Design/Logic Flaw

Certain MMU virtualization operations in Xen 4.2.x through 4.4.x, when using shadow pagetables, are not preemptible, which allows local HVM guest to cause a denial of service vcpu consumption by invoking these operations, which process every page assigned to a guest, a different vulnerability tha...

CVE-2014-5149

Certain MMU virtualization operations in Xen 4.2.x through 4.4.x, when using shadow pagetables, are not preemptible, which allows local HVM guest to cause a denial of service vcpu consumption by invoking these operations, which process every page assigned to a guest, a different vulnerability tha...

CVE-2014-5149

Certain MMU virtualization operations in Xen 4.2.x through 4.4.x, when using shadow pagetables, are not preemptible, which allows local HVM guest to cause a denial of service vcpu consumption by invoking these operations, which process every page assigned to a guest, a different vulnerability tha...

CVE-2014-5149: Undefined Security Weakness

Certain MMU virtualization operations in Xen 4.2.x through 4.4.x, when using shadow pagetables, are not preemptible, which allows local HVM guest to cause a denial of service vcpu consumption by invoking these operations, which process every page assigned to a guest, a different vulnerability tha...

Long latency virtual-mmu operations are not preemptible

ISSUE DESCRIPTION Some MMU virtualization operations on HVM guests must process every page assigned to a guest. For larger guests, this can tie up a vcpu for a significant amount of time, as the operations are not preemptible. For guests using Hardware Assisted Paging HAP, see below this is...

CVE-2014-4947

Buffer overflow in the HVM graphics console support in Citrix XenServer 6.2 Service Pack 1 and earlier has unspecified impact and attack vectors...

Buffer overflow

Buffer overflow in the HVM graphics console support in Citrix XenServer 6.2 Service Pack 1 and earlier has unspecified impact and attack vectors...

CVE-2014-4947: Improper Restriction of Operations within the Bounds of a Memory Buffer

Buffer overflow in the HVM graphics console support in Citrix XenServer 6.2 Service Pack 1 and earlier has unspecified impact and attack vectors...

PT-2014-6226

Name of the Vulnerable Software and Affected Versions Citrix XenServer versions 6.2 Service Pack 1 and earlier Description A buffer overflow issue exists in the HVM graphics console support, which has an unspecified impact and attack vectors. Recommendations For Citrix XenServer versions 6.2...

Fedora 19 : xen-4.2.4-5.fc19 (2014-7408)

Vulnerabilities in HVM MSI injection Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. %NASLMINLEVEL 703...