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CVE
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CVE-2016-3157Date: (C)2016-04-28   (M)2024-03-21


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.8CVSS Score : 7.2
Exploit Score: 1.8Exploit Score: 3.9
Impact Score: 5.9Impact Score: 10.0
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: COMPLETE
Scope: UNCHANGEDIntegrity: COMPLETE
Confidentiality: HIGHAvailability: COMPLETE
Integrity: HIGH 
Availability: HIGH 
  
Reference:
SECTRACK-1035308
BID-84594
DSA-3607
USN-2968-1
USN-2968-2
USN-2969-1
USN-2970-1
USN-2971-1
USN-2971-2
USN-2971-3
USN-2996-1
USN-2997-1
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://xenbits.xen.org/xsa/advisory-171.html

CPE    2
cpe:/o:xen:xen:4.0.0
cpe:/o:canonical:ubuntu_linux:12.04::~~lts~~~
CWE    1
CWE-264
OVAL    32
oval:org.secpod.oval:def:703096
oval:org.secpod.oval:def:110381
oval:org.secpod.oval:def:1600366
oval:org.secpod.oval:def:1800268
...

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