High severity · published Jan 23, 2017
CVE-2016-9382
Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash)…
7.8
CVSS
0.4%
EPSS
No
On KEV
Description
Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XE
Xen · Xen
4.0.0; 4.0.1; 4.0.2; 4.0.3; 4.0.4; 4.1.0; +33 more · source: NVD
XE
Xenserver · Citrix
6.0.2; 6.2.0; 6.5; 7.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-9382
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-9382
Third Party Advisory
http://www.securityfocus.com/bid/94470
Third Party Advisory
http://www.securitytracker.com/id/1037341
Patch
http://xenbits.xen.org/xsa/advisory-192.html
security.gentoo.org
https://security.gentoo.org/glsa/201612-56
Patch
https://support.citrix.com/article/CTX218775
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