Guest effectable page reference leak in MMU_MACHPHYS_UPDATE handling Insufficient restrictions on certain MMU update hypercalls, Missing privilege level checks in x86 emulation of far branches, Add fix for CVE-2014-0150 to qemu-dm, though it probably isn't exploitable from xen

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.

Excessive checking in compatibility mode hypercall argument translation, Insufficient bounding of 'REP MOVS' to MMIO emulated inside the hypervisor, fix segfaults and failures in xl migrate
--debug Guest effectable page reference leak in MMU_MACHPHYS_UPDATE handling Insufficient restrictions on certain MMU update hypercalls, Missing privilege level checks in x86 emulation of far branches, Add fix for CVE-2014-0150 to qemu-dm, though it probably isn't exploitable from xen

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.

The XEN virtualization was updated to fix bugs and security issues :

Security issues fixed: CVE-2015-0361: XSA-116: xen: xen crash due to use after free on hvm guest teardown 

CVE-2014-9065, CVE-2014-9066: XSA-114: xen: p2m lock starvation

CVE-2014-9030: XSA-113: Guest effectable page reference leak in MMU_MACHPHYS_UPDATE handling

CVE-2014-8867: XSA-112: xen: Insufficient bounding of 'REP MOVS' to MMIO emulated inside the hypervisor

CVE-2014-8866: XSA-111: xen: Excessive checking in compatibility mode hypercall argument translation

CVE-2014-8595: XSA-110: xen: Missing privilege level checks in x86 emulation of far branches

CVE-2014-8594: XSA-109: xen: Insufficient restrictions on certain MMU update hypercalls

CVE-2013-3495: XSA-59: xen: Intel VT-d Interrupt Remapping engines can be evaded by native NMI interrupts

CVE-2014-5146, CVE-2014-5149: xen: XSA-97 Long latency virtual-mmu operations are not preemptible

Bugs fixed :

  - Restore missing fixes from block-dmmd script

  - bnc#904255 - XEN boot hangs in early boot on UEFI system

  - Fix missing banner by restoring figlet program

  - bnc#903357 - Corrupted save/restore test leaves orphaned     data in xenstore

  - bnc#903359 - Temporary migration name is not cleaned up     after migration

  - bnc#903850 - Xen: guest user mode triggerable VM exits     not handled by hypervisor

  - bnc#866902 - Xen save/restore of HVM guests cuts off     disk and networking 

  - bnc#901317 - increase limit domUloader to 32MB

  - bnc#898772 - SLES 12 RC3 - XEN Host crashes when     assigning non-VF device (SR-IOV) to guest

  - bnc#882089 - Windows 2012 R2 fails to boot up with     greater than 60 vcpus

  - bsc#900292 - xl: change default dump directory

  - Update xen2libvirt.py to better detect and handle file     formats

  - bnc#882089 - Windows 2012 R2 fails to boot up with     greater than 60 vcpus

  - bnc#897906 - libxc: check return values on mmap() and     madvise() on xc_alloc_hypercall_buffer()

  - bnc#896023 - Adjust xentop column layout

Xen has been updated to version 4.2.5 with additional patches to fix six 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)

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

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

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

  - Insufficient restrictions on certain MMU update     hypercalls (CVE-2014-8594). These non-security issues     have been fixed :

  - Xen save/restore of HVM guests cuts off disk and     networking. (bnc#866902)

  - Windows 2012 R2 fails to boot up with greater than 60     vcpus. (bnc#882089)

  - Increase limit domUloader to 32MB. (bnc#901317)

  - Adjust xentop column layout. (bnc#896023)

ID	名稱	產品	系列	已發布	已更新	嚴重性
79652	Fedora 20 : xen-4.3.3-5.fc20 (2014-15521)	Nessus	Fedora Local Security Checks	2014/12/2	2021/1/11	high
79902	Fedora 21 : xen-4.4.1-9.fc21 (2014-15951)	Nessus	Fedora Local Security Checks	2014/12/15	2021/1/11	high
81305	openSUSE Security Update : xen (openSUSE-2015-129)	Nessus	SuSE Local Security Checks	2015/2/12	2021/1/19	high
80254	SuSE 11.3 Security Update : Xen (SAT Patch Number 10018)	Nessus	SuSE Local Security Checks	2014/12/26	2021/1/19	high

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