Issued:
2018-05-21
Updated:
2018-05-21

RHSA-2018:1666 - Security Advisory

Synopsis

Important: libvirt security update

Type/Severity

Security Advisory: Important

Topic

An update for libvirt is now available for Red Hat Enterprise Linux 6.6 Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended Update Support.

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

The libvirt library contains a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems.

Security Fix(es):

  • An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639)

Note: This is the libvirt side of the CVE-2018-3639 mitigation.

Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue.

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 the updated packages, libvirtd will be restarted automatically.

Affected Products

  • Red Hat Enterprise Linux Server - AUS 6.6 x86_64
  • Red Hat Enterprise Linux Server - TUS 6.6 x86_64

Fixes

  • BZ - 1566890 - CVE-2018-3639 hw: cpu: speculative store bypass

CVEs

References

Red Hat Enterprise Linux Server - AUS 6.6

SRPM
libvirt-0.10.2-46.el6_6.8.src.rpm SHA-256: 1d0ebf284e243751695eb40b65707359fc099ced581891e70dd3bbda988ed0b3
x86_64
libvirt-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: bf62d46af33db1681d5bace2649467048b1d43386378dee403c32b588afa68c7
libvirt-client-0.10.2-46.el6_6.8.i686.rpm SHA-256: cdeb0b6aed228d3c6bde742bc44f6d6180e9010b5db6332caae7e284bd34773c
libvirt-client-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: 1d1237ed5bdf3cc18258ced4d73118538c217f53be4726dd1016db4dd8a646c7
libvirt-debuginfo-0.10.2-46.el6_6.8.i686.rpm SHA-256: 835c7a49b5f36ade3cdb5e18526f2710402fd84d6ccca56603c26019791c7b4b
libvirt-debuginfo-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: b4632425a9e4025c37e1aa24ec26e91d0f0efecc9024b00e87d7fc6a79b95ab3
libvirt-debuginfo-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: b4632425a9e4025c37e1aa24ec26e91d0f0efecc9024b00e87d7fc6a79b95ab3
libvirt-devel-0.10.2-46.el6_6.8.i686.rpm SHA-256: 5b1b8a5862238fe72ff648ba54d36a00f11876a968c2adead75358168acaeec5
libvirt-devel-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: c51602bbcefa90704ea3ab4ed6cfe4e6319616f743a036695c1720341f11b122
libvirt-lock-sanlock-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: 5092dd8abd14777817285fc2e0db0ed6cf548b490a166d3a8b35e917705774f4
libvirt-python-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: 19b466c217468092b55545f969bf1b30a3bbe83d5af40ee72470ec11a78a505a

Red Hat Enterprise Linux Server - TUS 6.6

SRPM
libvirt-0.10.2-46.el6_6.8.src.rpm SHA-256: 1d0ebf284e243751695eb40b65707359fc099ced581891e70dd3bbda988ed0b3
x86_64
libvirt-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: bf62d46af33db1681d5bace2649467048b1d43386378dee403c32b588afa68c7
libvirt-client-0.10.2-46.el6_6.8.i686.rpm SHA-256: cdeb0b6aed228d3c6bde742bc44f6d6180e9010b5db6332caae7e284bd34773c
libvirt-client-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: 1d1237ed5bdf3cc18258ced4d73118538c217f53be4726dd1016db4dd8a646c7
libvirt-debuginfo-0.10.2-46.el6_6.8.i686.rpm SHA-256: 835c7a49b5f36ade3cdb5e18526f2710402fd84d6ccca56603c26019791c7b4b
libvirt-debuginfo-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: b4632425a9e4025c37e1aa24ec26e91d0f0efecc9024b00e87d7fc6a79b95ab3
libvirt-debuginfo-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: b4632425a9e4025c37e1aa24ec26e91d0f0efecc9024b00e87d7fc6a79b95ab3
libvirt-devel-0.10.2-46.el6_6.8.i686.rpm SHA-256: 5b1b8a5862238fe72ff648ba54d36a00f11876a968c2adead75358168acaeec5
libvirt-devel-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: c51602bbcefa90704ea3ab4ed6cfe4e6319616f743a036695c1720341f11b122
libvirt-lock-sanlock-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: 5092dd8abd14777817285fc2e0db0ed6cf548b490a166d3a8b35e917705774f4
libvirt-python-0.10.2-46.el6_6.8.x86_64.rpm SHA-256: 19b466c217468092b55545f969bf1b30a3bbe83d5af40ee72470ec11a78a505a

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