CVE-2014-3690 Information

Description

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d974baa398f34393db76be45f7d4d04fbdbb4a0a http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00035.html http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html http://rhn.redhat.com/errata/RHSA-2015-0290.html http://rhn.redhat.com/errata/RHSA-2015-0782.html http://rhn.redhat.com/errata/RHSA-2015-0864.html http://secunia.com/advisories/60174 http://www.debian.org/security/2014/dsa-3060 http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.2 http://www.mandriva.com/security/advisories?name=MDVSA-2015:058 http://www.openwall.com/lists/oss-security/2014/10/21/4 http://www.openwall.com/lists/oss-security/2014/10/29/7 http://www.securityfocus.com/bid/70691 http://www.ubuntu.com/usn/USN-2417-1 http://www.ubuntu.com/usn/USN-2418-1 http://www.ubuntu.com/usn/USN-2419-1 http://www.ubuntu.com/usn/USN-2420-1 http://www.ubuntu.com/usn/USN-2421-1 https://bugzilla.redhat.com/show_bug.cgi?id=1153322 https://github.com/torvalds/linux/commit/d974baa398f34393db76be45f7d4d04fbdbb4a0a

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5