Vulnerability Details : CVE-2017-12134
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.
Vulnerability category: Denial of service
Products affected by CVE-2017-12134
- cpe:2.3:a:citrix:xenserver:6.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:6.5:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:7.1:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:7.2:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-12134
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 25 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-12134
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
8.8
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
2.0
|
6.0
|
NIST |
CWE ids for CVE-2017-12134
-
The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-12134
-
http://xenbits.xen.org/xsa/advisory-229.html
XSA-229 - Xen Security AdvisoriesMitigation;Patch;Vendor Advisory
-
http://www.debian.org/security/2017/dsa-3981
Debian -- Security Information -- DSA-3981-1 linux
-
https://bugzilla.redhat.com/show_bug.cgi?id=1477656
1477656 – (CVE-2017-12134, xsa229) CVE-2017-12134 xsa229 xen: linux: Fix Xen block IO merge-ability calculation (XSA-229)Issue Tracking;Mitigation;Patch;Third Party Advisory
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http://www.securitytracker.com/id/1039176
Xen IO Request Merging Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System - SecurityTrackerThird Party Advisory;VDB Entry
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https://support.citrix.com/article/CTX225941
Citrix XenServer Multiple Security UpdatesPatch;Third Party Advisory
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http://www.securityfocus.com/bid/100343
Xen CVE-2017-12134 Memory Corruption VulnerabilityThird Party Advisory;VDB Entry
-
http://www.openwall.com/lists/oss-security/2017/08/15/4
oss-security - Xen Security Advisory 229 (CVE-2017-12134) - linux: Fix Xen block IO merge-ability calculationMailing List;Mitigation;Third Party Advisory
-
https://usn.ubuntu.com/3655-2/
USN-3655-2: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security notices
-
https://security.gentoo.org/glsa/201801-14
Xen: Multiple vulnerabilities (GLSA 201801-14) — Gentoo security
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https://usn.ubuntu.com/3655-1/
USN-3655-1: Linux kernel vulnerabilities | Ubuntu security notices
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