Vulnerability Details : CVE-2017-10920
The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unmapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 1.
Vulnerability category: OverflowMemory CorruptionDenial of service
Products affected by CVE-2017-10920
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-10920
0.64%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 76 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-10920
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
10.0
|
HIGH | AV:N/AC:L/Au:N/C:C/I:C/A:C |
10.0
|
10.0
|
NIST | |
|
10.0
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
3.9
|
6.0
|
NIST |
CWE ids for CVE-2017-10920
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-10920
-
https://security.gentoo.org/glsa/201710-17
Xen: Multiple vulnerabilities (GLSA 201710-17) — Gentoo security
-
http://www.debian.org/security/2017/dsa-3969
Debian -- Security Information -- DSA-3969-1 xen
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https://security.gentoo.org/glsa/201708-03
Gentoo Linux — Error 404 (Not Found)
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https://xenbits.xen.org/xsa/advisory-224.html
XSA-224 - Xen Security AdvisoriesPatch;Vendor Advisory
-
http://www.securitytracker.com/id/1038734
Xen Grant Table Mapping Bugs Let Local Users on a Guest System Gain Elevated Privileges on the Host System - SecurityTracker
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