Vulnerability Details : CVE-2018-5244
In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests. Unfortunately, one tracking structure isn't freed when a vcpu is destroyed. This allows guest OS administrators to cause a denial of service (host OS memory consumption) by rebooting many times.
Vulnerability category: OverflowDenial of service
Products affected by CVE-2018-5244
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-5244
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 23 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-5244
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
2.0
|
4.0
|
NIST |
CWE ids for CVE-2018-5244
-
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-2018-5244
-
http://www.securityfocus.com/bid/102433
Xen CVE-2018-5244 Memory Corruption VulnerabilityThird Party Advisory;VDB Entry
-
http://www.securitytracker.com/id/1040774
Xen MSR Emulation Memory Leak Lets Local Users on a Guest System Cause Denial of Service Conditions on the Host System - SecurityTracker
-
https://xenbits.xen.org/xsa/advisory-253.html
XSA-253 - Xen Security AdvisoriesIssue Tracking;Mitigation;Vendor Advisory
-
https://security.gentoo.org/glsa/201810-06
Xen: Multiple vulnerabilities (GLSA 201810-06) — Gentoo security
Jump to