Attacker Value
Unknown
0
CVE-2016-4020
0
CVE ID
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CVE-2016-4020
(Last updated October 05, 2023) ▾
MITRE ATT&CK
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Collection
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Command and Control
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Credential Access
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Defense Evasion
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Discovery
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Execution
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Exfiltration
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Impact
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Initial Access
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Lateral Movement
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Persistence
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Privilege Escalation
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Description
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
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CVSS V3 Severity and Metrics
Data provided by the National Vulnerability Database (NVD)
Base Score:
6.5 Medium
Impact Score:
4
Exploitability Score:
2
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Changed
Confidentiality (C):
High
Integrity (I):
None
Availability (A):
None
General Information
Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown
Vendors
- canonical,
- debian,
- qemu,
- redhat
Products
- debian linux 8.0,
- enterprise linux desktop 7.0,
- enterprise linux eus 7.4,
- enterprise linux eus 7.5,
- enterprise linux eus 7.6,
- enterprise linux eus 7.7,
- enterprise linux server 7.0,
- enterprise linux server aus 7.4,
- enterprise linux server aus 7.6,
- enterprise linux server aus 7.7,
- enterprise linux server tus 7.6,
- enterprise linux server tus 7.7,
- enterprise linux workstation 7.0,
- openstack 10,
- openstack 11,
- openstack 6.0,
- openstack 7.0,
- openstack 8,
- openstack 9,
- qemu,
- ubuntu linux 12.04,
- ubuntu linux 14.04,
- ubuntu linux 15.10,
- ubuntu linux 16.04,
- virtualization 4.0
References
Advisory
Additional Info
Authenticated
Unknown
Exploitable
Unknown
Reliability
Unknown
Stability
Unknown
Available Mitigations
Unknown
Shelf Life
Unknown
Userbase/Installbase
Unknown
Patch Effectiveness
Unknown
Rapid7
Technical Analysis
Report as Exploited in the Wild
CVE ID
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