Is CVE-2020-25637 in the CISA KEV catalog?

No. CVE-2020-25637 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-25637?

CVE-2020-25637 has a CVSS v3 base score of 6.7 (MEDIUM).

What is the EPSS score for CVE-2020-25637?

CVE-2020-25637 has an EPSS score of 0.53% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-25637?

Upgrade libvirt on debian 11 to 6.8.0-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2020-25637

MEDIUM

6.7

CVSS v3

NVD

Description

A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CWE-415

How to fix

Remediation Available

libvirtDebian

Fixed in:6.8.0-1CVE-2020-25637

libvirtUbuntu

Fixed in:4.0.0-1ubuntu8.21USN-5399-1

Fixed in:6.0.0-0ubuntu8.16USN-5399-1

libvirt-daemonUbuntu

Fixed in:4.0.0-1ubuntu8.21USN-5399-1

Fixed in:6.0.0-0ubuntu8.16USN-5399-1

libvirt-daemon-systemUbuntu

Fixed in:4.0.0-1ubuntu8.21USN-5399-1

Fixed in:6.0.0-0ubuntu8.16USN-5399-1

libvirt0Ubuntu

Fixed in:4.0.0-1ubuntu8.21USN-5399-1

Fixed in:6.0.0-0ubuntu8.16USN-5399-1

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 VectorLocal

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.53%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Third-Party Advisory3

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-415 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-25136	Medium	6.5	90%	-	Fix
CVE-2018-0101	Critical	10.0	87%	-	Fix
CVE-2003-0545	Critical	9.8	85%	-	Fix
CVE-2019-3829	Medium	5.3	59%	-	Fix
CVE-2026-33824	Critical	9.8	56%	-	Fix
CVE-2021-3407	Medium	5.5	50%	-	Fix

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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.