Vulnerability Details : CVE-2017-7228
An issue (known as XSA-212) was discovered in Xen, with fixes available for 4.8.x, 4.7.x, 4.6.x, 4.5.x, and 4.4.x. The earlier XSA-29 fix introduced an insufficient check on XENMEM_exchange input, allowing the caller to drive hypervisor memory accesses outside of the guest provided input/output arrays.
Exploit prediction scoring system (EPSS) score for CVE-2017-7228
Probability of exploitation activity in the next 30 days: 0.10%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 41 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2017-7228
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST |
|
8.2
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
1.5
|
6.0
|
NIST |
CWE ids for CVE-2017-7228
-
The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-7228
-
http://www.debian.org/security/2017/dsa-3847
Debian -- Security Information -- DSA-3847-1 xen
-
http://xenbits.xen.org/xsa/advisory-212.html
XSA-212 - Xen Security AdvisoriesPatch;Vendor Advisory
-
https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-029-2017.txt
qubes-secpack/qsb-029-2017.txt at master · QubesOS/qubes-secpack · GitHub
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https://googleprojectzero.blogspot.com/2017/04/pandavirtualization-exploiting-xen.html
Project Zero: Pandavirtualization: Exploiting the Xen hypervisorTechnical Description;Third Party Advisory
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http://www.securitytracker.com/id/1038223
Xen XENMEM_exchange Validation Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System - SecurityTracker
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https://www.exploit-db.com/exploits/41870/
Xen - Broken Check in 'memory_exchange()' Permits PV Guest Breakout
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http://openwall.com/lists/oss-security/2017/04/04/3
oss-security - Xen Security Advisory 212 (CVE-2017-7228) - x86: broken check in memory_exchange() permits PV guest breakoutMailing List;Third Party Advisory
-
http://www.securityfocus.com/bid/97375
Xen 'memory_exchange()' Function Incomplete Fix Privilege Escalation VulnerabilityThird Party Advisory;VDB Entry
Products affected by CVE-2017-7228
- cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*