CVE-2020-29570 — Allocation of Resources Without Limits or Throttling in XEN

CWE-770 — Allocation of Resources Without Limits or Throttling4 documents4 sources
Severity
6.2MEDIUMNVD
EPSS
0.1%
top 81.42%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
XENDebian XENDebian Linux+1 more
Timeline
PublishedDec 15
Latest updateMay 24

Description

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 2.5 | Impact: 3.6

Affected Packages3 packages

▶debiandebian/xen< xen 4.14.0+88-g1d1d1f5391-1 (bookworm)
▶Debianxen/xen< 4.14.0+88-g1d1d1f5391-1+3
▶NVDxen/xen4.4.0 — 4.14.0

Also affects: Debian Linux 10.0, Fedora 32, 33

Patches

Patch: xenbits.xenproject.org ↗Patch: xenbits.xenproject.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-rqmv-893j-49p8: An issue was discovered in Xen through 4↗2022-05-24
▶
OSV
CVE-2020-29570: An issue was discovered in Xen through 4↗2020-12-15
▶

📋Vendor Advisories

1
Debian
CVE-2020-29570: xen - An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control...↗2020
▶