CVE-2014-3633

Updated libvirt packages fix security vulnerabilities:

An out-of-bounds read flaw was found in the way libvirt's qemuDomainGetBlockIoTune() function looked up the disk index in a non-persistent (live) disk configuration while a persistent disk configuration was being indexed. A remote attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd or, potentially, leak memory from the libvirtd process (CVE-2014-3633).

A denial of service flaw was found in the way libvirt's virConnectListAllDomains() function computed the number of used domains. A remote attacker able to establish a read-only connection to libvirtd could use this flaw to make any domain operations within libvirt unresponsive (CVE-2014-3657).

These are all security issues fixed in the libvirt-2.5.0-1.1 package on the GA media of openSUSE Tumbleweed.

This collective update for KVM and libvirt provides fixes for security and non-security issues.

kvm:

* Fix NULL pointer dereference because of uninitialized UDP socket.
  (bsc#897654, CVE-2014-3640)
* Fix performance degradation after migration. (bsc#878350)
* Fix potential image corruption due to missing FIEMAP_FLAG_SYNC flag
  in FS_IOC_FIEMAP ioctl. (bsc#908381)
* Add validate hex properties for qdev. (bsc#852397)
* Add boot option to do strict boot (bsc#900084)
* Add query-command-line-options QMP command. (bsc#899144)
* Fix incorrect return value of migrate_cancel. (bsc#843074)
* Fix insufficient parameter validation during ram load. (bsc#905097,
  CVE-2014-7840)
* Fix insufficient blit region checks in qemu/cirrus. (bsc#907805,
  CVE-2014-8106)

libvirt:

* Fix security hole with migratable flag in dumpxml. (bsc#904176,
  CVE-2014-7823)
* Fix domain deadlock. (bsc#899484, CVE-2014-3657)
* Use correct definition when looking up disk in qemu blkiotune.
  (bsc#897783, CVE-2014-3633)
* Fix undefined symbol when starting virtlockd. (bsc#910145)
* Add '-boot strict' to qemu's commandline whenever possible.
  (bsc#900084)
* Add support for 'reboot-timeout' in qemu. (bsc#899144)
* Increase QEMU's monitor timeout to 30sec. (bsc#911742)
* Allow setting QEMU's migration max downtime any time. (bsc#879665)

Security Issues:

* CVE-2014-7823
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7823>
* CVE-2014-3657
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3657>
* CVE-2014-3633
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3633>
* CVE-2014-3640
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3640>
* CVE-2014-7840
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7840>
* CVE-2014-8106
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8106>

The qemuDomainGetBlockIoTune function in qemu/qemu_driver.c in libvirt before 1.2.9, when a disk has been hot-plugged or removed from the live image, allows remote attackers to cause a denial of service (crash) or read sensitive heap information via a crafted blkiotune query, which triggers an out-of-bounds read.

Daniel P. Berrange and Richard Jones discovered that libvirt incorrectly handled XML documents containing XML external entity declarations. An attacker could use this issue to cause libvirtd to crash, resulting in a denial of service on all affected releases, or possibly read arbitrary files if fine grained access control was enabled on Ubuntu 14.04 LTS. (CVE-2014-0179, CVE-2014-5177)

Luyao Huang discovered that libvirt incorrectly handled certain blkiotune queries. An attacker could use this issue to cause libvirtd to crash, resulting in a denial of service. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-3633)