CVE-2021-3308
published 2021-01-26CVE-2021-3308: 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…
PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.42%
33.8th percentile
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.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | xen | < xen 4.14.1+11-gb0b734a8b3-1 (bookworm) | xen 4.14.1+11-gb0b734a8b3-1 (bookworm) |
| fedoraproject | fedora | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | >= 0 < 4.14.1+11-gb0b734a8b3-1 | 4.14.1+11-gb0b734a8b3-1 |
| xen | xen | >= 0 < 4.14.1+11-gb0b734a8b3-1 | 4.14.1+11-gb0b734a8b3-1 |
| xen | xen | >= 0 < 4.14.1+11-gb0b734a8b3-1 | 4.14.1+11-gb0b734a8b3-1 |
| xen | xen | >= 0 < 4.14.1+11-gb0b734a8b3-1 | 4.14.1+11-gb0b734a8b3-1 |
| xen | xen | 4.13.1 – 4.14.1 | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv2.04.9MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C
osv5.5MEDIUM
vendor_debian5.5MEDIUM
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GHSA
GHSA-4gx5-7c23-79mh: An issue was discovered in Xen 4
ghsa_unreviewed·2022-05-24
CVE-2021-3308 [MEDIUM] GHSA-4gx5-7c23-79mh: An issue was discovered in Xen 4
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.
OSV
CVE-2021-3308: An issue was discovered in Xen 4
osv·2021-01-26·CVSS 5.5
CVE-2021-3308 [MEDIUM] CVE-2021-3308: An issue was discovered in Xen 4
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.
Debian
CVE-2021-3308: xen - An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. ...
vendor_debian·2021·CVSS 5.5
CVE-2021-3308 [MEDIUM] CVE-2021-3308: xen - An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. ...
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.
Scope: local
bookworm: resolved (fixed in 4.14.1+11-gb0b734a8b3-1)
bullseye: resolved (fixed in 4.1
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
http://www.openwall.com/lists/oss-security/2021/01/26/4http://xenbits.xen.org/xsa/advisory-360.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S5C42TMQYB6SDVT2MPFEWY65A6RSUVBN/https://security.gentoo.org/glsa/202107-30http://www.openwall.com/lists/oss-security/2021/01/26/4http://xenbits.xen.org/xsa/advisory-360.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S5C42TMQYB6SDVT2MPFEWY65A6RSUVBN/https://security.gentoo.org/glsa/202107-30
2021-01-26
Published