CVE-2019-19583 — Uncontrolled Resource Consumption in XEN

CWE-400 — Uncontrolled Resource ConsumptionCWE-20 — Improper Input Validation7 documents6 sources
Severity
7.5HIGHNVD
EPSS
2.1%
top 16.03%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
XENDebian XENDebian Linux+2 more
Timeline
PublishedDec 11
Latest updateMay 24

Description

An issue was discovered in Xen through 4.12.x allowing x86 HVM/PVH guest OS users to cause a denial of service (guest OS crash) because VMX VMEntry checks mishandle a certain case. Please see XSA-260 for background on the MovSS shadow. Please see XSA-156 for background on the need for #DB interception. The VMX VMEntry checks do not like the exact combination of state which occurs when #DB in intercepted, Single Stepping is active, and blocked by STI/MovSS is active, despite this being a legitima…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶debiandebian/xen< xen 4.11.3+24-g14b62ab3e5-1 (bookworm)
▶Debianxen/xen< 4.11.3+24-g14b62ab3e5-1+3
▶NVDxen/xen4.8.0 — 4.12.1
▶NVDopensuse/leap15.1

Also affects: Debian Linux 10.0, 9.0, Fedora 30, 31

Patches

Patch: xenbits.xen.org ↗Patch: xenbits.xen.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-5g75-j346-c9xj: An issue was discovered in Xen through 4↗2022-05-24
▶
OSV
CVE-2019-19583: An issue was discovered in Xen through 4↗2019-12-11
▶

📋Vendor Advisories

2
Red Hat
xen: denial of service in HVM/PVH guest userspace code (XSA-308)↗2019-12-11
▶
Debian
CVE-2019-19583: xen - An issue was discovered in Xen through 4.12.x allowing x86 HVM/PVH guest OS user...↗2019
▶

💬Community

2
Bugzilla
CVE-2019-19583 xen: denial of service in HVM/PVH guest userspace code (XSA-308) [fedora-all]↗2019-12-11
▶
Bugzilla
CVE-2019-19583 xen: denial of service in HVM/PVH guest userspace code (XSA-308)↗2019-11-29
▶