certfr_avis - certfr-2021-avi-086

CERTFR-2021-AVI-086

Vulnerability from certfr_avis

Une vulnérabilité a été découverte dans Citrix Hypervisor. Elle permet à un attaquant de provoquer un déni de service à distance.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Citrix	Citrix Hypervisor	Citrix Hypervisor versions 8.2 LTSR sans le correctif de sécurité XS82E016

References

Title

Publication Time

CVE-2021-3308 (GCVE-0-2021-3308)

Vulnerability from cvelistv5

Published

2021-01-26 19:58

Modified

2024-08-03 16:53

Severity ?

CWE

Summary

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.

References

URL

Tags

	http://xenbits.xen.org/xsa/advisory-360.html	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2021/01/26/4	mailing-list, x_refsource_MLIST
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S5C42TMQYB6SDVT2MPFEWY65A6RSUVBN/	vendor-advisory, x_refsource_FEDORA
	https://security.gentoo.org/glsa/202107-30	vendor-advisory, x_refsource_GENTOO

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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