Executive Summary

Informations
Name CVE-2021-3308 First vendor Publication 2021-01-26
Vendor Cve Last vendor Modification 2023-11-07

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 5.5
Base Score 5.5 Environmental Score 5.5
impact SubScore 3.6 Temporal Score 5.5
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:N/I:N/A:C)
Cvss Base Score 4.9 Attack Range Local
Cvss Impact Score 6.9 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3308

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 17
Os 1
Os 159

Sources (Detail)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora...
Source Url
GENTOO https://security.gentoo.org/glsa/202107-30
MISC http://xenbits.xen.org/xsa/advisory-360.html
MLIST http://www.openwall.com/lists/oss-security/2021/01/26/4

Alert History

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Date Informations
2023-11-07 21:35:57
  • Multiple Updates
2023-08-02 02:05:38
  • Multiple Updates
2022-04-26 21:23:31
  • Multiple Updates
2021-09-02 01:44:22
  • Multiple Updates
2021-08-05 01:43:05
  • Multiple Updates
2021-07-12 12:41:15
  • Multiple Updates
2021-05-04 14:09:21
  • Multiple Updates
2021-04-22 03:14:47
  • Multiple Updates
2021-03-26 12:38:46
  • Multiple Updates
2021-02-04 17:23:01
  • Multiple Updates
2021-01-31 09:23:01
  • Multiple Updates
2021-01-27 09:23:23
  • Multiple Updates
2021-01-27 00:23:07
  • First insertion