This update of XEN fixes various denial of service bugs.

  - bnc#789945 - CVE-2012-5510: xen: Grant table version     switch list corruption vulnerability (XSA-26)

  - bnc#789944 - CVE-2012-5511: xen: Several HVM operations     do not validate the range of their inputs (XSA-27)

  - bnc#789940 - CVE-2012-5512: xen: HVMOP_get_mem_access     crash / HVMOP_set_mem_access information leak (XSA-28)

  - bnc#789951 - CVE-2012-5513: xen: XENMEM_exchange may     overwrite hypervisor memory (XSA-29)

  - bnc#789948 - CVE-2012-5514: xen: Missing unlock in     guest_physmap_mark_populate_on_demand() (XSA-30)

  - bnc#789950 - CVE-2012-5515: xen: Several memory     hypercall operations allow invalid extent order values     (XSA-31)

  - bnc#789988 - FATAL PAGE FAULT in hypervisor     (arch_do_domctl)     25931-x86-domctl-iomem-mapping-checks.patch

  - Upstream patches from Jan     26132-tmem-save-NULL-check.patch     26134-x86-shadow-invlpg-check.patch     26148-vcpu-timer-overflow.patch (Replaces     CVE-2012-4535-xsa20.patch)     26149-x86-p2m-physmap-error-path.patch (Replaces     CVE-2012-4537-xsa22.patch)     26150-x86-shadow-unhook-toplevel-check.patch (Replaces     CVE-2012-4538-xsa23.patch)     26151-gnttab-compat-get-status-frames.patch (Replaces     CVE-2012-4539-xsa24.patch)

  - bnc#777628 - guest 'disappears' after live migration     Updated block-dmmd script

  - Fix exception in balloon.py and osdep.py     xen-max-free-mem.diff

  - bnc#792476 - efi files missing in latest XEN update     Revert c/s 25751 EFI Makefile changes in     23614-x86_64-EFI-boot.patch

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2015-0068 for details.

This security update of XEN fixes various bugs and security issues.

  - Upstream patch 26088-xend-xml-filesize-check.patch

  - bnc#787163 - CVE-2012-4544: xen: Domain builder Out-of-     memory due to malicious kernel/ramdisk (XSA 25)     CVE-2012-4544-xsa25.patch

  - bnc#779212 - CVE-2012-4411: XEN / qemu: guest     administrator can access qemu monitor console (XSA-19)     CVE-2012-4411-xsa19.patch

  - bnc#786516 - CVE-2012-4535: xen: Timer overflow DoS     vulnerability CVE-2012-4535-xsa20.patch

  - bnc#786518 - CVE-2012-4536: xen: pirq range check DoS     vulnerability CVE-2012-4536-xsa21.patch

  - bnc#786517 - CVE-2012-4537: xen: Memory mapping failure     DoS vulnerability CVE-2012-4537-xsa22.patch

  - bnc#786519 - CVE-2012-4538: xen: Unhooking empty PAE     entries DoS vulnerability CVE-2012-4538-xsa23.patch

  - bnc#786520 - CVE-2012-4539: xen: Grant table hypercall     infinite loop DoS vulnerability     CVE-2012-4539-xsa24.patch

  - bnc#784087 - L3: Xen BUG at io_apic.c:129     26102-x86-IOAPIC-legacy-not-first.patch

  - Upstream patches from Jan     26054-x86-AMD-perf-ctr-init.patch     26055-x86-oprof-hvm-mode.patch     26056-page-alloc-flush-filter.patch     26061-x86-oprof-counter-range.patch     26062-ACPI-ERST-move-data.patch     26063-x86-HPET-affinity-lock.patch     26093-HVM-PoD-grant-mem-type.patch

  - Upstream patches from Jan     25931-x86-domctl-iomem-mapping-checks.patch     25952-x86-MMIO-remap-permissions.patch

  - Upstream patches from Jan     25808-domain_create-return-value.patch     25814-x86_64-set-debugreg-guest.patch     25815-x86-PoD-no-bug-in-non-translated.patch     25816-x86-hvm-map-pirq-range-check.patch     25833-32on64-bogus-pt_base-adjust.patch     25834-x86-S3-MSI-resume.patch     25835-adjust-rcu-lock-domain.patch     25836-VT-d-S3-MSI-resume.patch 25850-tmem-xsa-15-1.patch     25851-tmem-xsa-15-2.patch 25852-tmem-xsa-15-3.patch     25853-tmem-xsa-15-4.patch 25854-tmem-xsa-15-5.patch     25855-tmem-xsa-15-6.patch 25856-tmem-xsa-15-7.patch     25857-tmem-xsa-15-8.patch 25858-tmem-xsa-15-9.patch     25859-tmem-missing-break.patch 25860-tmem-cleanup.patch     25883-pt-MSI-cleanup.patch     25927-x86-domctl-ioport-mapping-range.patch     25929-tmem-restore-pool-version.patch

  - bnc#778105 - first XEN-PV VM fails to spawn xend:
    Increase wait time for disk to appear in host bootloader     Modified existing xen-domUloader.diff

  - Upstream patches from Jan     25752-ACPI-pm-op-valid-cpu.patch     25754-x86-PoD-early-access.patch     25755-x86-PoD-types.patch     25756-x86-MMIO-max-mapped-pfn.patch     25757-x86-EPT-PoD-1Gb-assert.patch     25764-x86-unknown-cpu-no-sysenter.patch     25765-x86_64-allow-unsafe-adjust.patch     25771-grant-copy-status-paged-out.patch     25773-x86-honor-no-real-mode.patch     25786-x86-prefer-multiboot-meminfo-over-e801.patch

  - bnc#777890 - CVE-2012-3497: xen: multiple TMEM hypercall     vulnerabilities (XSA-15)     CVE-2012-3497-tmem-xsa-15-1.patch     CVE-2012-3497-tmem-xsa-15-2.patch     CVE-2012-3497-tmem-xsa-15-3.patch     CVE-2012-3497-tmem-xsa-15-4.patch     CVE-2012-3497-tmem-xsa-15-5.patch     CVE-2012-3497-tmem-xsa-15-6.patch     CVE-2012-3497-tmem-xsa-15-7.patch     CVE-2012-3497-tmem-xsa-15-8.patch     CVE-2012-3497-tmem-xsa-15-9.patch     tmem-missing-break.patch

XEN was updated to fix various bugs and security issues :

The following security issues have been fixed :

  - xen: Domain builder Out-of-memory due to malicious     kernel/ramdisk (XSA 25). (CVE-2012-4544)

  - XEN / qemu: guest administrator can access qemu monitor     console (XSA-19). (CVE-2012-4411)

  - xen: Timer overflow DoS vulnerability (XSA 20).
    (CVE-2012-4535)

  - xen: pirq range check DoS vulnerability (XSA 21).
    (CVE-2012-4536)

  - xen: Memory mapping failure DoS vulnerability (XSA 22).
    (CVE-2012-4537)

  - xen: Unhooking empty PAE entries DoS vulnerability (XSA     23). (CVE-2012-4538)

  - xen: Grant table hypercall infinite loop DoS     vulnerability (XSA 24). (CVE-2012-4539)

  - xen: multiple TMEM hypercall vulnerabilities (XSA-15)     Also the following bugs have been fixed and upstream     patches have been applied:. (CVE-2012-3497)

  - L3: Xen BUG at io_apic.c:129     26102-x86-IOAPIC-legacy-not-first.patch. (bnc#784087)

  - Upstream patches merged:
    26054-x86-AMD-perf-ctr-init.patch     26055-x86-oprof-hvm-mode.patch     26056-page-alloc-flush-filter.patch     26061-x86-oprof-counter-range.patch     26062-ACPI-ERST-move-data.patch     26063-x86-HPET-affinity-lock.patch     26093-HVM-PoD-grant-mem-type.patch     25931-x86-domctl-iomem-mapping-checks.patch     25952-x86-MMIO-remap-permissions.patch     25808-domain_create-return-value.patch     25814-x86_64-set-debugreg-guest.patch     25815-x86-PoD-no-bug-in-non-translated.patch     25816-x86-hvm-map-pirq-range-check.patch     25833-32on64-bogus-pt_base-adjust.patch     25834-x86-S3-MSI-resume.patch     25835-adjust-rcu-lock-domain.patch     25836-VT-d-S3-MSI-resume.patch 25850-tmem-xsa-15-1.patch     25851-tmem-xsa-15-2.patch 25852-tmem-xsa-15-3.patch     25853-tmem-xsa-15-4.patch 25854-tmem-xsa-15-5.patch     25855-tmem-xsa-15-6.patch 25856-tmem-xsa-15-7.patch     25857-tmem-xsa-15-8.patch 25858-tmem-xsa-15-9.patch     25859-tmem-missing-break.patch 25860-tmem-cleanup.patch     25883-pt-MSI-cleanup.patch     25927-x86-domctl-ioport-mapping-range.patch     25929-tmem-restore-pool-version.patch

  - first XEN-PV VM fails to spawn xend: Increase wait time     for disk to appear in host bootloader Modified existing     xen-domUloader.diff. (bnc#778105)

    25752-ACPI-pm-op-valid-cpu.patch     25754-x86-PoD-early-access.patch     25755-x86-PoD-types.patch     25756-x86-MMIO-max-mapped-pfn.patch

Updated kernel packages that fix multiple security issues, two bugs, and add two enhancements are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

These packages contain the Linux kernel.

Security fixes :

* A race condition in the way asynchronous I/O and fallocate() interacted when using ext4 could allow a local, unprivileged user to obtain random data from a deleted file. (CVE-2012-4508, Important)

* A flaw in the way the Xen hypervisor implementation range checked guest provided addresses in the XENMEM_exchange hypercall could allow a malicious, para-virtualized guest administrator to crash the hypervisor or, potentially, escalate their privileges, allowing them to execute arbitrary code at the hypervisor level. (CVE-2012-5513, Important)

* A flaw in the Reliable Datagram Sockets (RDS) protocol implementation could allow a local, unprivileged user to cause a denial of service. (CVE-2012-2372, Moderate)

* A race condition in the way access to inet->opt ip_options was synchronized in the Linux kernel's TCP/IP protocol suite implementation. Depending on the network facing applications running on the system, a remote attacker could possibly trigger this flaw to cause a denial of service. A local, unprivileged user could use this flaw to cause a denial of service regardless of the applications the system runs. (CVE-2012-3552, Moderate)

* The Xen hypervisor implementation did not properly restrict the period values used to initialize per VCPU periodic timers. A privileged guest user could cause an infinite loop on the physical CPU. If the watchdog were enabled, it would detect said loop and panic the host system. (CVE-2012-4535, Moderate)

* A flaw in the way the Xen hypervisor implementation handled set_p2m_entry() error conditions could allow a privileged, fully-virtualized guest user to crash the hypervisor. (CVE-2012-4537, Moderate)

Red Hat would like to thank Theodore Ts'o for reporting CVE-2012-4508;
the Xen project for reporting CVE-2012-5513, CVE-2012-4535, and CVE-2012-4537; and Hafid Lin for reporting CVE-2012-3552. Upstream acknowledges Dmitry Monakhov as the original reporter of CVE-2012-4508. CVE-2012-2372 was discovered by Li Honggang of Red Hat.

Bug fixes :

* Previously, the interrupt handlers of the qla2xxx driver could clear pending interrupts right after the IRQ lines were attached during system start-up. Consequently, the kernel could miss the interrupt that reported completion of the link initialization, and the qla2xxx driver then failed to detect all attached LUNs. With this update, the qla2xxx driver has been modified to no longer clear interrupt bits after attaching the IRQ lines. The driver now correctly detects all attached LUNs as expected. (BZ#870118)

* The Ethernet channel bonding driver reported the MII (Media Independent Interface) status of the bond interface in 802.3ad mode as being up even though the MII status of all of the slave devices was down. This could pose a problem if the MII status of the bond interface was used to determine if failover should occur. With this update, the agg_device_up() function has been added to the bonding driver, which allows the driver to report the link status of the bond interface correctly, that is, down when all of its slaves are down, in the 802.3ad mode. (BZ#877943)

Enhancements :

* This update backports several changes from the latest upstream version of the bnx2x driver. The most important change, the remote-fault link detection feature, allows the driver to periodically scan the physical link layer for remote faults. If the physical link appears to be up and a fault is detected, the driver indicates that the link is down. When the fault is cleared, the driver indicates that the link is up again. (BZ#870120)

* The INET socket interface has been modified to send a warning message when the ip_options structure is allocated directly by a third-party module using the kmalloc() function. (BZ#874973)

Users should upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements.
The system must be rebooted for this update to take effect.

Security fixes :

  - A race condition in the way asynchronous I/O and     fallocate() interacted when using ext4 could allow a     local, unprivileged user to obtain random data from a     deleted file. (CVE-2012-4508, Important)

  - A flaw in the way the Xen hypervisor implementation     range checked guest provided addresses in the     XENMEM_exchange hypercall could allow a malicious,     para-virtualized guest administrator to crash the     hypervisor or, potentially, escalate their privileges,     allowing them to execute arbitrary code at the     hypervisor level. (CVE-2012-5513, Important)

  - A flaw in the Reliable Datagram Sockets (RDS) protocol     implementation could allow a local, unprivileged user to     cause a denial of service. (CVE-2012-2372, Moderate)

  - A race condition in the way access to inet->opt     ip_options was synchronized in the Linux kernel's TCP/IP     protocol suite implementation. Depending on the network     facing applications running on the system, a remote     attacker could possibly trigger this flaw to cause a     denial of service. A local, unprivileged user could use     this flaw to cause a denial of service regardless of the     applications the system runs. (CVE-2012-3552, Moderate)

  - The Xen hypervisor implementation did not properly     restrict the period values used to initialize per VCPU     periodic timers. A privileged guest user could cause an     infinite loop on the physical CPU. If the watchdog were     enabled, it would detect said loop and panic the host     system. (CVE-2012-4535, Moderate)

  - A flaw in the way the Xen hypervisor implementation     handled set_p2m_entry() error conditions could allow a     privileged, fully-virtualized guest user to crash the     hypervisor. (CVE-2012-4537, Moderate)

Bug fixes :

  - Previously, the interrupt handlers of the qla2xxx driver     could clear pending interrupts right after the IRQ lines     were attached during system start-up. Consequently, the     kernel could miss the interrupt that reported completion     of the link initialization, and the qla2xxx driver then     failed to detect all attached LUNs. With this update,     the qla2xxx driver has been modified to no longer clear     interrupt bits after attaching the IRQ lines. The driver     now correctly detects all attached LUNs as expected.

  - The Ethernet channel bonding driver reported the MII     (Media Independent Interface) status of the bond     interface in 802.3ad mode as being up even though the     MII status of all of the slave devices was down. This     could pose a problem if the MII status of the bond     interface was used to determine if failover should     occur. With this update, the agg_device_up() function     has been added to the bonding driver, which allows the     driver to report the link status of the bond interface     correctly, that is, down when all of its slaves are     down, in the 802.3ad mode.

Enhancements :

  - This update backports several changes from the latest     upstream version of the bnx2x driver. The most important     change, the remote-fault link detection feature, allows     the driver to periodically scan the physical link layer     for remote faults. If the physical link appears to be up     and a fault is detected, the driver indicates that the     link is down. When the fault is cleared, the driver     indicates that the link is up again.

  - The INET socket interface has been modified to send a     warning message when the ip_options structure is     allocated directly by a third-party module using the     kmalloc() function.

The system must be rebooted for this update to take effect.

This security update of XEN fixes various bugs and security issues.

  - Upstream patch 26088-xend-xml-filesize-check.patch

  - bnc#787163 - CVE-2012-4544: xen: Domain builder Out-of-     memory due to malicious kernel/ramdisk (XSA 25)     CVE-2012-4544-xsa25.patch

  - bnc#779212 - CVE-2012-4411: XEN / qemu: guest     administrator can access qemu monitor console (XSA-19)     CVE-2012-4411-xsa19.patch

  - bnc#786516 - CVE-2012-4535: xen: Timer overflow DoS     vulnerability CVE-2012-4535-xsa20.patch

  - bnc#786518 - CVE-2012-4536: xen: pirq range check DoS     vulnerability CVE-2012-4536-xsa21.patch

  - bnc#786517 - CVE-2012-4537: xen: Memory mapping failure     DoS vulnerability CVE-2012-4537-xsa22.patch

  - bnc#786519 - CVE-2012-4538: xen: Unhooking empty PAE     entries DoS vulnerability CVE-2012-4538-xsa23.patch

  - bnc#786520 - CVE-2012-4539: xen: Grant table hypercall     infinite loop DoS vulnerability     CVE-2012-4539-xsa24.patch

  - bnc#784087 - L3: Xen BUG at io_apic.c:129     26102-x86-IOAPIC-legacy-not-first.patch

  - Upstream patches from Jan     26054-x86-AMD-perf-ctr-init.patch     26055-x86-oprof-hvm-mode.patch     26056-page-alloc-flush-filter.patch     26061-x86-oprof-counter-range.patch     26062-ACPI-ERST-move-data.patch     26063-x86-HPET-affinity-lock.patch     26093-HVM-PoD-grant-mem-type.patch

  - Upstream patches from Jan     25931-x86-domctl-iomem-mapping-checks.patch     25952-x86-MMIO-remap-permissions.patch

------------------------------------------------------------------- Mon Sep 24 16:41:58 CEST 2012 - ohering@suse.de

  - use BuildRequires: gcc46 only in sles11sp2 or 12.1 to     fix build in 11.4

------------------------------------------------------------------- Thu Sep 20 10:03:40 MDT 2012 - carnold@novell.com

  - Upstream patches from Jan     25808-domain_create-return-value.patch     25814-x86_64-set-debugreg-guest.patch     25815-x86-PoD-no-bug-in-non-translated.patch     25816-x86-hvm-map-pirq-range-check.patch     25833-32on64-bogus-pt_base-adjust.patch     25834-x86-S3-MSI-resume.patch     25835-adjust-rcu-lock-domain.patch     25836-VT-d-S3-MSI-resume.patch 25850-tmem-xsa-15-1.patch     25851-tmem-xsa-15-2.patch 25852-tmem-xsa-15-3.patch     25853-tmem-xsa-15-4.patch 25854-tmem-xsa-15-5.patch     25855-tmem-xsa-15-6.patch 25856-tmem-xsa-15-7.patch     25857-tmem-xsa-15-8.patch 25858-tmem-xsa-15-9.patch     25859-tmem-missing-break.patch 25860-tmem-cleanup.patch     25883-pt-MSI-cleanup.patch     25927-x86-domctl-ioport-mapping-range.patch     25929-tmem-restore-pool-version.patch

  - bnc#778105 - first XEN-PV VM fails to spawn xend:
    Increase wait time for disk to appear in host bootloader     Modified existing xen-domUloader.diff

  - Upstream patches from Jan     25752-ACPI-pm-op-valid-cpu.patch     25754-x86-PoD-early-access.patch     25755-x86-PoD-types.patch     25756-x86-MMIO-max-mapped-pfn.patch     25757-x86-EPT-PoD-1Gb-assert.patch     25764-x86-unknown-cpu-no-sysenter.patch     25765-x86_64-allow-unsafe-adjust.patch     25771-grant-copy-status-paged-out.patch     25773-x86-honor-no-real-mode.patch     25786-x86-prefer-multiboot-meminfo-over-e801.patch

  - bnc#777890 - CVE-2012-3497: xen: multiple TMEM hypercall     vulnerabilities (XSA-15)     CVE-2012-3497-tmem-xsa-15-1.patch     CVE-2012-3497-tmem-xsa-15-2.patch     CVE-2012-3497-tmem-xsa-15-3.patch     CVE-2012-3497-tmem-xsa-15-4.patch     CVE-2012-3497-tmem-xsa-15-5.patch     CVE-2012-3497-tmem-xsa-15-6.patch     CVE-2012-3497-tmem-xsa-15-7.patch     CVE-2012-3497-tmem-xsa-15-8.patch     CVE-2012-3497-tmem-xsa-15-9.patch     tmem-missing-break.patch

A guest can block a cpu by setting a bad VCPU deadline [XSA 20, CVE-2012-4535] (#876198) HVM guest can exhaust p2m table crashing xen [XSA 22, CVE-2012-4537] (#876203) PAE HVM guest can crash hypervisor [XSA-23, CVE-2012-4538] (#876205) 32-bit PV guest on 64-bit hypervisor can cause an hypervisor infinite loop [XSA-24, CVE-2012-4539] (#876207)

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.

From Red Hat Security Advisory 2012:1540 :

Updated kernel packages that fix multiple security issues, two bugs, and add two enhancements are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

These packages contain the Linux kernel.

Security fixes :

* A race condition in the way asynchronous I/O and fallocate() interacted when using ext4 could allow a local, unprivileged user to obtain random data from a deleted file. (CVE-2012-4508, Important)

* A flaw in the way the Xen hypervisor implementation range checked guest provided addresses in the XENMEM_exchange hypercall could allow a malicious, para-virtualized guest administrator to crash the hypervisor or, potentially, escalate their privileges, allowing them to execute arbitrary code at the hypervisor level. (CVE-2012-5513, Important)

* A flaw in the Reliable Datagram Sockets (RDS) protocol implementation could allow a local, unprivileged user to cause a denial of service. (CVE-2012-2372, Moderate)

* A race condition in the way access to inet->opt ip_options was synchronized in the Linux kernel's TCP/IP protocol suite implementation. Depending on the network facing applications running on the system, a remote attacker could possibly trigger this flaw to cause a denial of service. A local, unprivileged user could use this flaw to cause a denial of service regardless of the applications the system runs. (CVE-2012-3552, Moderate)

* The Xen hypervisor implementation did not properly restrict the period values used to initialize per VCPU periodic timers. A privileged guest user could cause an infinite loop on the physical CPU. If the watchdog were enabled, it would detect said loop and panic the host system. (CVE-2012-4535, Moderate)

* A flaw in the way the Xen hypervisor implementation handled set_p2m_entry() error conditions could allow a privileged, fully-virtualized guest user to crash the hypervisor. (CVE-2012-4537, Moderate)

Red Hat would like to thank Theodore Ts'o for reporting CVE-2012-4508;
the Xen project for reporting CVE-2012-5513, CVE-2012-4535, and CVE-2012-4537; and Hafid Lin for reporting CVE-2012-3552. Upstream acknowledges Dmitry Monakhov as the original reporter of CVE-2012-4508. CVE-2012-2372 was discovered by Li Honggang of Red Hat.

Bug fixes :

* Previously, the interrupt handlers of the qla2xxx driver could clear pending interrupts right after the IRQ lines were attached during system start-up. Consequently, the kernel could miss the interrupt that reported completion of the link initialization, and the qla2xxx driver then failed to detect all attached LUNs. With this update, the qla2xxx driver has been modified to no longer clear interrupt bits after attaching the IRQ lines. The driver now correctly detects all attached LUNs as expected. (BZ#870118)

* The Ethernet channel bonding driver reported the MII (Media Independent Interface) status of the bond interface in 802.3ad mode as being up even though the MII status of all of the slave devices was down. This could pose a problem if the MII status of the bond interface was used to determine if failover should occur. With this update, the agg_device_up() function has been added to the bonding driver, which allows the driver to report the link status of the bond interface correctly, that is, down when all of its slaves are down, in the 802.3ad mode. (BZ#877943)

Enhancements :

* This update backports several changes from the latest upstream version of the bnx2x driver. The most important change, the remote-fault link detection feature, allows the driver to periodically scan the physical link layer for remote faults. If the physical link appears to be up and a fault is detected, the driver indicates that the link is down. When the fault is cleared, the driver indicates that the link is up again. (BZ#870120)

* The INET socket interface has been modified to send a warning message when the ip_options structure is allocated directly by a third-party module using the kmalloc() function. (BZ#874973)

Users should upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements.
The system must be rebooted for this update to take effect.

The remote OracleVM system is missing necessary patches to address critical security updates :

  - libxc: builder: limit maximum size of kernel/ramdisk.
    Allowing user supplied kernels of arbitrary sizes,     especially during decompression, can swallow up dom0     memory leading to either virtual address space     exhaustion in the builder process or allocation     failures/OOM killing of both toolstack and unrelated     processes. We disable these checks when building in a     stub domain for pvgrub since this uses the guest's own     memory and is isolated. Decompression of gzip compressed     kernels and ramdisks has been safe since     14954:58205257517d (Xen 3.1.0 onwards). This is XSA-25 /     CVE-2012-4544. Also make explicit checks for buffer     overflows in various decompression routines. These were     already ruled out due to other properties of the code     but check them as a belt-and-braces measure.

    [ Includes 25589:60f09d1ab1fe for CVE-2012-2625]     (CVE-2012-4544)

  - compat/gnttab: Prevent infinite loop in compat code c/s     20281:95ea2052b41b, which introduces Grant Table version     2 hypercalls introduces a vulnerability whereby the     compat hypercall handler can fall into an infinite loop.
    If the watchdog is enabled, Xen will die after the     timeout. This is a security problem, XSA-24 /     CVE-2012-4539. (CVE-2012-4539)

  - xen/mm/shadow: check toplevel pagetables are present     before unhooking them. If the guest has not fully     populated its top-level PAE entries when it calls     HVMOP_pagetable_dying, the shadow code could try to     unhook entries from MFN 0. Add a check to avoid that     case. This issue was introduced by c/s     21239:b9d2db109cf5. This is a security problem, XSA-23 /     CVE-2012-4538. (CVE-2012-4538)

  - x86/physmap: Prevent incorrect updates of m2p mappings     In certain conditions, such as low memory, set_p2m_entry     can fail. Currently, the p2m and m2p tables will get out     of sync because we still update the m2p table after the     p2m update has failed. If that happens, subsequent     guest-invoked memory operations can cause BUGs and     ASSERTs to kill Xen. This is fixed by only updating the     m2p table iff the p2m was successfully updated. This is     a security problem, XSA-22 / CVE-2012-4537.
    (CVE-2012-4537)

  - x86/physdev: Range check pirq parameter from guests     Otherwise Xen will read beyond either end of the struct     domain.arch.pirq_emuirq array, usually resulting in a     fatal page fault. This vulnerability was introduced by     c/s 23241:d21100f1d00e, which adds a call to     domain_pirq_to_emuirq which uses the guest provided pirq     value before range checking it, and was fixed by c/s     23573:584c2e5e03d9 which changed the behaviour of the     domain_pirq_to_emuirq macro to use radix trees instead     of a flat array. This is XSA-21 / CVE-2012-4536.
    (CVE-2012-4536)

  - VCPU/timers: Prevent overflow in calculations, leading     to DoS vulnerability The timer action for a vcpu     periodic timer is to calculate the next expiry time, and     to reinsert itself into the timer queue. If the deadline     ends up in the past, Xen never leaves __do_softirq. The     affected PCPU will stay in an infinite loop until Xen is     killed by the watchdog (if enabled). This is a security     problem, XSA-20 / CVE-2012-4535. (CVE-2012-4535)

  - Correct RTC time offset update error for HVM guest     changeset 24947:b198ada9689d

  - always release vm running lock on VM shutdown Before     this patch, when xend restarted, the VM running lock     will not be released on shutdown, so the VM could never     start again. Talked with Junjie, we recommend always     releasing the lock on VM shutdown. So even when xend     restarted, there should be no stale lock leaving there.

ID	名稱	產品	系列	已發布	已更新	嚴重性
74852	openSUSE Security Update : xen (openSUSE-SU-2012:1685-1)	Nessus	SuSE Local Security Checks	2014/6/13	2021/1/19	medium
84140	OracleVM 3.2 : xen (OVMSA-2015-0068) (POODLE) (Venom)	Nessus	OracleVM Local Security Checks	2015/6/12	2021/1/4	low
74820	openSUSE Security Update : XEN (openSUSE-SU-2012:1572-1)	Nessus	SuSE Local Security Checks	2014/6/13	2021/1/19	high
64238	SuSE 11.2 Security Update : Xen (SAT Patch Number 7018)	Nessus	SuSE Local Security Checks	2013/1/25	2021/1/19	medium
63171	CentOS 5 : kernel (CESA-2012:1540)	Nessus	CentOS Local Security Checks	2012/12/7	2021/1/4	medium
63183	Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20121204)	Nessus	Scientific Linux Local Security Checks	2012/12/7	2021/1/14	medium
74821	openSUSE Security Update : XEN (openSUSE-SU-2012:1573-1)	Nessus	SuSE Local Security Checks	2014/6/13	2021/1/19	high
63032	Fedora 18 : xen-4.2.0-4.fc18 (2012-18146)	Nessus	Fedora Local Security Checks	2012/11/26	2021/1/11	medium
68662	Oracle Linux 5 : kernel (ELSA-2012-1540-1)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2021/1/14	medium
79489	OracleVM 3.1 : xen (OVMSA-2012-0051)	Nessus	OracleVM Local Security Checks	2014/11/26	2021/1/4	medium

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