Ubuntu.comUB:CVE-2016-4020CVE-2016-4020
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
6.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
0.001 Low
EPSS
Percentile
25.3%
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).
Bugs
References
www.openwall.com/lists/oss-security/2016/04/13/6
launchpad.net/bugs/cve/CVE-2016-4020
lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.html
nvd.nist.gov/vuln/detail/CVE-2016-4020
security-tracker.debian.org/tracker/CVE-2016-4020
ubuntu.com/security/notices/USN-2974-1
www.cve.org/CVERecord?id=CVE-2016-4020
Related
2.1 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
6.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
0.001 Low
EPSS
Percentile
25.3%