Is CVE-2019-19583 in the CISA KEV catalog?

No. CVE-2019-19583 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-19583?

CVE-2019-19583 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-19583?

CVE-2019-19583 has an EPSS score of 2.15% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-19583?

Upgrade xen on debian 11 to 4.11.3+24-g14b62ab3e5-1 or later.

CVE & CISA-KEV Catalog

CVE-2019-19583

HIGHEPSS 80th pctl

7.5

CVSS v3

NVD

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 legitimate state to be in. The resulting VMEntry failure is fatal to the guest. HVM/PVH guest userspace code may be able to crash the guest, resulting in a guest Denial of Service. All versions of Xen are affected. Only systems supporting VMX hardware virtual extensions (Intel, Cyrix, or Zhaoxin CPUs) are affected. Arm and AMD systems are unaffected. Only HVM/PVH guests are affected. PV guests cannot leverage the vulnerability.

How to fix

Remediation Available

xenDebian

Fixed in:4.11.3+24-g14b62ab3e5-1CVE-2019-19583

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

2.15%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Patch1

xenbits.xen.org

Third-Party Advisory4

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.