Issued:

2018-08-16

Updated:

2018-08-16

RHSA-2018:2462 - Important: qemu-kvm security and bug fix update

Synopsis

Important: qemu-kvm security and bug fix update

Type/Severity

Security Advisory Important

Topic

An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. 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

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

Security Fix(es):

• QEMU: slirp: heap buffer overflow while reassembling fragmented datagrams (CVE-2018-11806)

• QEMU: i386: multiboot OOB access while loading kernel image (CVE-2018-7550)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat would like to thank Jskz - Zero Day Initiative (trendmicro.com) for reporting CVE-2018-11806 and Cyrille Chatras (Orange.com) and CERT-CC (Orange.com) for reporting CVE-2018-7550.

Bug Fix(es):

• Previously, live migrating a Windows guest in some cases caused the guest to become unresponsive. This update ensures that Real-time Clock (RTC) interrupts are not missed, which prevents the problem from occurring. (BZ#1596302)

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

Updated Packages

• qemu-img-1.5.3-156.el7_5.5.x86_64.rpm
• qemu-kvm-1.5.3-156.el7_5.5.src.rpm
• qemu-kvm-1.5.3-156.el7_5.5.x86_64.rpm
• qemu-kvm-debuginfo-1.5.3-156.el7_5.5.x86_64.rpm
• qemu-kvm-tools-1.5.3-156.el7_5.5.x86_64.rpm
• qemu-kvm-common-1.5.3-156.el7_5.5.x86_64.rpm

Fixes

• This content is not included.BZ - 1549798
• This content is not included.BZ - 1586245

CVEs

• CVE-2018-7550
• CVE-2018-11806

References

• https://access.redhat.com/security/updates/classification/#important

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.