The HVMOP_set_mem_access HVM control operations in Xen 4.1.x for 32-bit and 4.1.x through 4.4.x for 64-bit allow local guest administrators to cause a denial of service (CPU consumption) by leveraging access to certain service domains for HVM guests and a large input.

xen was updated to fix 14 security issues :

  - Guest effectable page reference leak in     MMU_MACHPHYS_UPDATE handling (CVE-2014-9030).

  - Insufficient bounding of 'REP MOVS' to MMIO emulated     inside the hypervisor (CVE-2014-8867).

  - Missing privilege level checks in x86 HLT, LGDT, LIDT,     and LMSW emulation (CVE-2014-7155).

  - Hypervisor heap contents leaked to guests     (CVE-2014-4021).

  - Missing privilege level checks in x86 emulation of far     branches (CVE-2014-8595).

  - Insufficient restrictions on certain MMU update     hypercalls (CVE-2014-8594).

  - Intel VT-d Interrupt Remapping engines can be evaded by     native NMI interrupts (CVE-2013-3495).

  - Missing privilege level checks in x86 emulation of     software interrupts (CVE-2014-7156).

  - Race condition in HVMOP_track_dirty_vram     (CVE-2014-7154).

  - Improper MSR range used for x2APIC emulation     (CVE-2014-7188).

  - HVMOP_set_mem_type allows invalid P2M entries to be     created (CVE-2014-3124).

  - HVMOP_set_mem_access is not preemptible (CVE-2014-2599).

  - Excessive checking in compatibility mode hypercall     argument translation (CVE-2014-8866).

  - Guest user mode triggerable VM exits not handled by     hypervisor (bnc#903850).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The SUSE Linux Enterprise 11 Service Pack 3 Xen package was updated to fix various bugs and security issues.

The following security issues have been fixed :

  - XSA-108: CVE-2014-7188: Improper MSR range used for     x2APIC emulation. (bnc#897657)

  - XSA-106: CVE-2014-7156: Missing privilege level checks     in x86 emulation of software interrupts. (bnc#895802)

  - XSA-105: CVE-2014-7155: Missing privilege level checks     in x86 HLT, LGDT, LIDT, and LMSW emulation. (bnc#895799)

  - XSA-104: CVE-2014-7154: Race condition in     HVMOP_track_dirty_vram. (bnc#895798)

  - XSA-100: CVE-2014-4021: Hypervisor heap contents leaked     to guests. (bnc#880751)

  - XSA-96: CVE-2014-3967 / CVE-2014-3968: Vulnerabilities     in HVM MSI injection. (bnc#878841)

  - XSA-89: CVE-2014-2599: HVMOP_set_mem_access is not     preemptible. (bnc#867910)

  - XSA-65: CVE-2013-4344: qemu SCSI REPORT LUNS buffer     overflow. (bnc#842006)

  - qemu: zaurus: buffer overrun on invalid state load     (bnc#864801) The following non-security issues have been     fixed:. (CVE-2013-4540)

  - xend: Fix netif convertToDeviceNumber for running     domains. (bnc#891539)

  - Installing SLES12 as a VM on SLES11 SP3 fails because of     btrfs in the VM. (bnc#882092)

  - XEN kernel panic do_device_not_available(). (bnc#881900)

  - Boot Failure with xen kernel in UEFI mode with error 'No     memory for trampoline'. (bnc#833483)

  - SLES 11 SP3 vm-install should get RHEL 7 support when     released. (bnc#862608)

  - SLES 11 SP3 XEN kiso version cause softlockup on 8     blades npar(480 cpu). (bnc#858178)

  - Local attach support for PHY backends using scripts     local_attach_support_for_phy.patch. (bnc#865682)

  - Improve multipath support for npiv devices block-npiv     (bnc#798770)

XEN was updated to fix various bugs and security issues.

Security issues fixed :

  - bnc#897657 - CVE-2014-7188: XSA-108 Improper MSR range     used for x2APIC emulation

  - bnc#895802 - CVE-2014-7156: XSA-106: Missing privilege     level checks in x86 emulation of software interrupts

  - bnc#895799 - CVE-2014-7155: XSA-105: Missing privilege     level checks in x86 HLT, LGDT, LIDT, and LMSW emulation

  - bnc#895798 - CVE-2014-7154: XSA-104: Race condition in     HVMOP_track_dirty_vram

  - bnc#864801 - CVE-2013-4540: qemu: zaurus: buffer overrun     on invalid state load 

  - bnc#880751 - CVE-2014-4021: XSA-100: Hypervisor heap     contents leaked to guests

  - bnc#878841 - CVE-2014-3967,CVE-2014-3968: XSA-96:
    Vulnerabilities in HVM MSI injection

  - bnc#867910 - CVE-2014-2599: XSA-89: HVMOP_set_mem_access     is not preemptible

  - bnc#842006 - CVE-2013-4344: XSA-65: xen: qemu SCSI     REPORT LUNS buffer overflow

Other bugs fixed :

  - bnc#896023 - Adjust xentop column layout

  - bnc#891539 - xend: fix netif convertToDeviceNumber for     running domains

  - bnc#820873 - The 'long' option doesn't work with 'xl     list'

  - bnc#881900 - XEN kernel panic do_device_not_available()

  - bnc#833483 - Boot Failure with xen kernel in UEFI mode     with error 'No memory for trampoline'

  - bnc#862608 - SLES 11 SP3 vm-install should get RHEL 7     support when released

  - bnc#858178 - [HP HPS Bug]: SLES11sp3 XEN kiso version     cause softlockup on 8 blades npar(480 cpu)

  - bnc#865682 - Local attach support for PHY backends using     scripts

  - bnc#798770 - Improve multipath support for npiv devices

Multiple security issues have been discovered in the Xen virtualisation solution which may result in information leaks or denial of service.

The remote host is affected by the vulnerability described in GLSA-201407-03 (Xen: Multiple Vunlerabilities)

    Multiple vulnerabilities have been discovered in Xen. Please review the       CVE identifiers referenced below for details.
  Impact :

    A remote attacker can utilize multiple vectors to execute arbitrary       code, cause Denial of Service, or gain access to data on the host.
  Workaround :

    There is no known workaround at this time.

HVMOP_set_mem_access is not preemptible [XSA-89, CVE-2014-2599] (#1080425)

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.

ID	Name	Product	Family	Severity
83654	SUSE SLES11 Security Update : xen (SUSE-SU-2014:1710-1)	Nessus	SuSE Local Security Checks	high
78652	SuSE 11.3 Security Update : Xen (SAT Patch Number 9828)	Nessus	SuSE Local Security Checks	high
78116	openSUSE Security Update : xen (openSUSE-SU-2014:1279-1)	Nessus	SuSE Local Security Checks	high
77240	Debian DSA-3006-1 : xen - security update	Nessus	Debian Local Security Checks	high
76544	GLSA-201407-03 : Xen: Multiple Vunlerabilities	Nessus	Gentoo Local Security Checks	high
73362	Fedora 20 : xen-4.3.2-2.fc20 (2014-4458)	Nessus	Fedora Local Security Checks	medium
73355	Fedora 19 : xen-4.2.4-3.fc19 (2014-4424)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2014-2599

medium

Tenable Plugins

high

high

high

high

high

medium

medium