Description

The paravirt_ops_setup function in arch/x86/kernel/kvm.c in the Linux kernel through 3.18 uses an improper paravirt_enabled setting for KVM guest kernels, which makes it easier for guest OS users to bypass the ASLR protection mechanism via a crafted application that reads a 16-bit value.

References

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/msg00009.html

http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html

http://people.canonical.com/~ubuntu-security/cve/2014/CVE-2014-8134.html

http://rhn.redhat.com/errata/RHSA-2016-0855.html

http://secunia.com/advisories/62336

http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html

http://www.securityfocus.com/bid/71650

http://www.spinics.net/lists/kvm/msg111458.html

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1400314

https://bugzilla.novell.com/show_bug.cgi?id=909078

https://bugzilla.redhat.com/show_bug.cgi?id=1172765

https://support.f5.com/csp/article/K17120

https://support.f5.com/csp/article/K17120?utm_source=f5support&utm_medium=RSS

Details

Risk Information

CVSS v2

CVSS v3