Bug 1144897 (CVE-2014-3647) - CVE-2014-3647 kernel: kvm: noncanonical rip after emulation
Summary: CVE-2014-3647 kernel: kvm: noncanonical rip after emulation
Status: NEW
Alias: CVE-2014-3647
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20141021,repor...
Keywords: Reopened, Security
Depends On: 1152993 1152994 1152995 1152996 1152997
Blocks: 1144830
TreeView+ depends on / blocked
 
Reported: 2014-09-21 22:32 UTC by Petr Matousek
Modified: 2018-08-28 21:55 UTC (History)
20 users (show)

(edit)
A flaw was found in the way the Linux kernel's KVM subsystem handled non-canonical addresses when emulating instructions that change the RIP (for example, branches or calls). A guest user with access to an I/O or MMIO region could use this flaw to crash the guest.
Clone Of:
(edit)
Last Closed: 2015-04-22 11:05:57 UTC


Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:2152 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2015-11-20 00:56:02 UTC

Description Petr Matousek 2014-09-21 22:32:53 UTC
kvm currently mishandles noncanonical addresses when emulating instructions
that change rip (eg branches, calls), potentially causing a failed VM-entry.

A guest user with access to I/O or MMIO region can use this flaw to crash the
guest.

Acknowledgements:

Red Hat would like to thank Nadav Amit for reporting this issue.

Comment 4 Petr Matousek 2014-10-15 10:52:56 UTC
Statement:

This issue does affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7. Future kernel updates may address this issue.

This issue does affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6. The risks associated with fixing this bug are greater than its security impact. This issue is not currently planned to be addressed in future kernel updates for Red Hat Enterprise Linux 6.

This issue does affect the kvm packages as shipped with Red Hat Enterprise Linux 5.

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Comment 6 errata-xmlrpc 2015-11-19 20:20:26 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2152 https://rhn.redhat.com/errata/RHSA-2015-2152.html

Comment 7 errata-xmlrpc 2015-11-19 23:23:09 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2152 https://rhn.redhat.com/errata/RHSA-2015-2152.html


Note You need to log in before you can comment on or make changes to this bug.