CVE-2020-29570

published 2020-12-15

CVE-2020-29570: An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is…

Priority P4 20 medium 6.2 CVSS 3.1

AV L AC L PR N UI N S U C N I N A H

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
debian	debian_linux	—	—
debian	xen	< xen 4.14.0+88-g1d1d1f5391-1 (bookworm)	xen 4.14.0+88-g1d1d1f5391-1 (bookworm)
fedoraproject	fedora	—	—
fedoraproject	fedora	—	—
xen	xen	>= 0 < 4.14.0+88-g1d1d1f5391-1	4.14.0+88-g1d1d1f5391-1
xen	xen	>= 0 < 4.14.0+88-g1d1d1f5391-1	4.14.0+88-g1d1d1f5391-1
xen	xen	>= 0 < 4.14.0+88-g1d1d1f5391-1	4.14.0+88-g1d1d1f5391-1
xen	xen	>= 0 < 4.14.0+88-g1d1d1f5391-1	4.14.0+88-g1d1d1f5391-1
xen	xen	4.4.0 – 4.14.0	—

CVSS provenance

nvd v3.1 6.2 MEDIUM CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd v2.0 4.9 MEDIUM AV:L/AC:L/Au:N/C:N/I:N/A:C

osv 6.2 MEDIUM

vendor_debian 6.2 MEDIUM

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