CVE-2017-12134

HIGH

Description

The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.

References

http://www.debian.org/security/2017/dsa-3981

http://www.openwall.com/lists/oss-security/2017/08/15/4

http://www.securityfocus.com/bid/100343

http://www.securitytracker.com/id/1039176

http://xenbits.xen.org/xsa/advisory-229.html

https://bugzilla.redhat.com/show_bug.cgi?id=1477656

https://security.gentoo.org/glsa/201801-14

https://support.citrix.com/article/CTX225941

https://usn.ubuntu.com/3655-1/

https://usn.ubuntu.com/3655-2/

Details

Source: MITRE

Published: 2017-08-24

Updated: 2018-05-31

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 7.2

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

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3.0

Base Score: 8.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Impact Score: 6

Exploitability Score: 2

Severity: HIGH