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Red Hat Product Errata RHSA-2017:3466 - Security Advisory
Issued:
2017-12-14
Updated:
2017-12-14

RHSA-2017:3466 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Moderate: qemu-kvm-rhev security and bug fix update

Type/Severity

Security Advisory: Moderate

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for qemu-kvm-rhev is now available for Red Hat OpenStack Platform 11.0 (Ocata).

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.

Security Fix(es):

  • An assertion-failure flaw was found in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service. (CVE-2017-7539)
  • Quick Emulator (QEMU) built with the Network Block Device (NBD) Server support is vulnerable to a crash via a SIGPIPE signal. The crash can occur if a client aborts a connection due to any failure during negotiation or read operation. A remote user/process could use this flaw to crash the qemu-nbd server resulting in a Denial of Service (DoS). (CVE-2017-10664)
  • Quick Emulator (QEMU), compiled with qemu_map_ram_ptr to access guests' RAM block area, is vulnerable to an OOB r/w access issue. The crash can occur if a privileged user inside a guest conducts certain DMA operations, resulting in a DoS. (CVE-2017-11334)
  • Quick Emulator (QEMU), compiled with the PC System Emulator with multiboot feature support, is vulnerable to an OOB r/w memory access issue. The issue could occur due to an integer overflow while loading a kernel image during a guest boot. A user or process could use this flaw to potentially achieve arbitrary code execution on a host. (CVE-2017-14167)
  • Quick emulator (QEMU), compiled with the Cirrus CLGD 54xx VGA Emulator support, is vulnerable to an OOB write access issue. The issue could occur while writing to VGA memory via mode4and5 write functions. A privileged user inside guest could use this flaw to crash the QEMU process resulting in Denial of Serivce (DoS). (CVE-2017-15289)

Red Hat would like to thank Alex for reporting CVE-2017-11334; Thomas Garnier (Google.com) for reporting CVE-2017-14167; and Guoxiang Niu (Huawei.com) for reporting CVE-2017-15289.

Bug Fix(es):

  • Hot-unplugging Virtual Function I/O (VFIO) devices previously failed when performed after hot-unplugging a vhost network device. This update fixes the underlying code, and the VFIO device is unplugged correctly in the described circumstances. (BZ#1498135)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect.

Affected Products

  • Red Hat OpenStack 11 x86_64

Fixes

  • BZ - 1466190 - CVE-2017-10664 Qemu: qemu-nbd: server breaks with SIGPIPE upon client abort
  • BZ - 1471638 - CVE-2017-11334 Qemu: exec: oob access during dma operation
  • BZ - 1473622 - CVE-2017-7539 Qemu: qemu-nbd crashes due to undefined I/O coroutine
  • BZ - 1489375 - CVE-2017-14167 Qemu: i386: multiboot OOB access while loading kernel image
  • BZ - 1498135 - Hot-unplugging a vhost network device leaks references to VFIOPCIDevice's [OSP 11]
  • BZ - 1501290 - CVE-2017-15289 Qemu: cirrus: OOB access issue in mode4and5 write functions

CVEs

  • CVE-2017-7539
  • CVE-2017-10664
  • CVE-2017-11334
  • CVE-2017-14167
  • CVE-2017-15289

References

  • https://access.redhat.com/security/updates/classification/#moderate
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat OpenStack 11

SRPM
qemu-kvm-rhev-2.9.0-16.el7_4.11.src.rpm SHA-256: c8ba2bbd5801877e5c2ac8e4d79d5b86b6b1e081180b9378f862a82e9f03a50c
x86_64
qemu-img-rhev-2.9.0-16.el7_4.11.x86_64.rpm SHA-256: 5830af532493cbf110e63543c79e8a181ea554fa603d642dea8372eb415e7c15
qemu-kvm-common-rhev-2.9.0-16.el7_4.11.x86_64.rpm SHA-256: 6f91bc0aec19d7ca43086123876d4e4e8a94c031a638df3d19ef8d08a9843f75
qemu-kvm-rhev-2.9.0-16.el7_4.11.x86_64.rpm SHA-256: 64ed25aa85910898dd0eba272a85a20c0ded11022d40881614429c68ca751df9
qemu-kvm-rhev-debuginfo-2.9.0-16.el7_4.11.x86_64.rpm SHA-256: 4e48f620950ed695a1cc76be218e8a4ef27dc1de52689b3ee88b7557d6d3a503
qemu-kvm-tools-rhev-2.9.0-16.el7_4.11.x86_64.rpm SHA-256: 3626b390cd164a43f42bbd099262f90019c8326c5e82572e3bb7eaf29ad0043a

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.

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