Vulnerability Details : CVE-2016-3157
The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
Vulnerability category: Denial of service
Products affected by CVE-2016-3157
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
- cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-3157
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 26 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-3157
| 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 | |
|
7.8
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2016-3157
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-3157
-
http://www.ubuntu.com/usn/USN-2971-2
USN-2971-2: Linux kernel (Wily HWE) vulnerabilities | Ubuntu security notices
-
http://www.ubuntu.com/usn/USN-2971-1
USN-2971-1: Linux kernel vulnerabilities | Ubuntu security notices
-
http://xenbits.xen.org/xsa/advisory-171.html
XSA-171 - Xen Security AdvisoriesPatch;Vendor Advisory
-
http://www.ubuntu.com/usn/USN-2971-3
USN-2971-3: Linux kernel (Raspberry Pi 2) vulnerabilities | Ubuntu security notices
-
http://www.securityfocus.com/bid/84594
Linux Kernel Xen PV Guest CVE-2016-3157 Local Privilege Escalation Vulnerability
-
http://www.ubuntu.com/usn/USN-2970-1
USN-2970-1: Linux kernel (Vivid HWE) vulnerabilities | Ubuntu security notices
-
http://www.ubuntu.com/usn/USN-2996-1
USN-2996-1: Linux kernel vulnerabilities | Ubuntu security notices
-
http://www.ubuntu.com/usn/USN-2969-1
USN-2969-1: Linux kernel (Utopic HWE) vulnerabilities | Ubuntu security notices
-
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
Oracle Linux Bulletin - April 2016
-
http://www.securitytracker.com/id/1035308
Xen I/O Port Access Missing PHYSDEVOP_set_iopl Hypercall Lets Local Users on a Guest System Gain Elevated Privileges on the Guest System - SecurityTracker
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http://www.ubuntu.com/usn/USN-2997-1
USN-2997-1: Linux kernel (OMAP4) vulnerabilities | Ubuntu security notices
-
http://www.ubuntu.com/usn/USN-2968-1
USN-2968-1: Linux kernel vulnerabilities | Ubuntu security notices
-
http://www.debian.org/security/2016/dsa-3607
Debian -- Security Information -- DSA-3607-1 linux
-
http://www.ubuntu.com/usn/USN-2968-2
USN-2968-2: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security notices
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