CVE-2015-5307

medium

Description

It was found that the x86 ISA (Instruction Set Architecture) is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way (sequential) delivering of benign exceptions such as #AC (alignment check exception) is handled. A privileged user inside a guest could use this flaw to create denial of service conditions on the host kernel.

References

http://www.openwall.com/lists/oss-security/2015/11/10/6

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54a20552e1eae07aa240fa370a0293e006b5faed

https://bugzilla.redhat.com/show_bug.cgi?id=1277172

https://github.com/torvalds/linux/commit/54a20552e1eae07aa240fa370a0293e006b5faed

http://xenbits.xen.org/xsa/advisory-156.html

http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html

http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html

http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html

http://www.securityfocus.com/bid/77528

http://rhn.redhat.com/errata/RHSA-2016-0046.html

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00013.html

http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172435.html

http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00035.html

http://www.ubuntu.com/usn/USN-2805-1

http://www.debian.org/security/2015/dsa-3396

http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00005.html

http://www.ubuntu.com/usn/USN-2802-1

http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00026.html

http://www.securitytracker.com/id/1034105

http://www.debian.org/security/2016/dsa-3454

http://rhn.redhat.com/errata/RHSA-2015-2636.html

http://support.citrix.com/article/CTX202583

http://lists.opensuse.org/opensuse-updates/2015-12/msg00039.html

http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172300.html

http://www.debian.org/security/2015/dsa-3414

http://www.ubuntu.com/usn/USN-2801-1

http://www.ubuntu.com/usn/USN-2804-1

http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172187.html

http://www.ubuntu.com/usn/USN-2807-1

http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00031.html

http://www.ubuntu.com/usn/USN-2806-1

http://www.ubuntu.com/usn/USN-2800-1

http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html

http://rhn.redhat.com/errata/RHSA-2015-2645.html

http://www.ubuntu.com/usn/USN-2803-1

https://kb.juniper.net/JSA10783

https://access.redhat.com/errata/RHSA-2015:2636

https://access.redhat.com/errata/RHSA-2015:2552

https://access.redhat.com/security/cve/CVE-2015-5307

https://access.redhat.com/errata/RHSA-2015:2645

https://access.redhat.com/errata/RHSA-2015:2587

https://access.redhat.com/errata/RHSA-2016:0004

https://access.redhat.com/errata/RHSA-2016:0024

https://access.redhat.com/errata/RHSA-2016:0046

Details

Source: MITRE

Published: 2015-11-16

Updated: 2023-02-02

Type: CWE-399

Risk Information

CVSS v2

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM