CVE-2017-5715

Impact:
Important
Public Date:
2018-01-03
Bugzilla:
1519780: CVE-2017-5715 hw: cpu: speculative execution branch target injection
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation 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 cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks.

Find out more about CVE-2017-5715 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

Red Hat Product Security is aware of this issue. Updates will be released as they become available. For additional information, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/security/vulnerabilities/speculativeexecution

CVSS v3 metrics

CVSS3 Base Score 5.6
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity Impact None
Availability Impact None

Affected Packages State

Platform Package State
Red Hat OpenStack Platform 9.0 qemu-kvm-rhev Affected
Red Hat OpenStack Platform 8.0 (Liberty) qemu-kvm-rhev Affected
Red Hat OpenStack Platform 12.0 qemu-kvm-rhev Affected
Red Hat OpenStack Platform 11 qemu-kvm-rhev Affected
Red Hat OpenStack Platform 10 qemu-kvm-rhev Affected
Red Hat Enterprise MRG 2 kernel-rt Affected
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 qemu-kvm-rhev Affected
Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 qemu-kvm-rhev Affected
Red Hat Enterprise Linux 7 qemu-kvm Affected
Red Hat Enterprise Linux 7 linux-firmware Affected
Red Hat Enterprise Linux 7 qemu-kvm-rhev Affected
Red Hat Enterprise Linux 7 kernel-rt Affected
Red Hat Enterprise Linux 7 libvirt Affected
Red Hat Enterprise Linux 7 kernel Affected
Red Hat Enterprise Linux 7 kernel-alt Affected
Red Hat Enterprise Linux 7 dracut Affected
Red Hat Enterprise Linux 7 microcode_ctl Affected
Red Hat Enterprise Linux 7 qemu-kvm-ma Affected
Red Hat Enterprise Linux 6 libvirt Affected
Red Hat Enterprise Linux 6 qemu-kvm-rhev Affected
Red Hat Enterprise Linux 6 qemu-kvm Affected
Red Hat Enterprise Linux 6 kernel Affected
Red Hat Enterprise Linux 6 microcode_ctl Affected
Red Hat Enterprise Linux 5 kernel Affected
Red Hat Enterprise Linux 5 microcode_ctl Affected
RHEV-M for Servers rhev-hypervisor-ng Affected
RHEV-M for Servers vdsm Affected
RHEV-M for Servers rhev-hypervisor Affected
RHEV-M for Servers rhevm-setup-plugins Affected
RHEV-M 4.0 rhevm-appliance Affected
RHEV-M 4.0 ovirt-guest-agent-docker Affected
RHEV-M 4.0 rhevm-setup-plugins Affected
RHEV-M 4.0 vdsm Affected
RHEV-M 4.0 rhev-hypervisor Affected

Acknowledgements

Red Hat would like to thank Google Project Zero for reporting this issue.

External References

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