Vulnerability Details : CVE-2017-10917
Xen through 4.8.x does not validate the port numbers of polled event channel ports, which allows guest OS users to cause a denial of service (NULL pointer dereference and host OS crash) or possibly obtain sensitive information, aka XSA-221.
Vulnerability category: Memory CorruptionDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2017-10917
Probability of exploitation activity in the next 30 days: 0.47%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 72 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2017-10917
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
9.4
|
HIGH | AV:N/AC:L/Au:N/C:C/I:N/A:C |
10.0
|
9.2
|
NIST |
9.1
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
3.9
|
5.2
|
NIST |
CWE ids for CVE-2017-10917
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A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-10917
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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-221.html
XSA-221 - Xen Security AdvisoriesMailing List;Mitigation;Third Party Advisory
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http://www.securityfocus.com/bid/99157
Xen 'xen/arch/x86/irq.c' NULL pointer Dereference Remote Denial of Service Vulnerability
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http://www.securitytracker.com/id/1038731
Xen Event Channel Polling Bug Lets Local Users on a Guest System Cause Denial of Service Conditions on the Host System - SecurityTracker
Products affected by CVE-2017-10917
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*