Is CVE-2020-14399 in the CISA KEV catalog?

No. CVE-2020-14399 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-14399?

CVE-2020-14399 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-14399?

CVE-2020-14399 has an EPSS score of 2.80% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-14399?

Upgrade libvncserver on debian 11 to 0.9.13+dfsg-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2020-14399

HIGHEPSS 85th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.

How to fix

Remediation Available

libvncserverDebian

Fixed in:0.9.13+dfsg-1CVE-2020-14399

libvncclient1Ubuntu

Fixed in:0.9.10+dfsg-3ubuntu0.16.04.5USN-4434-1

Fixed in:0.9.11+dfsg-1ubuntu1.3USN-4434-1

Fixed in:0.9.12+dfsg-9ubuntu0.2USN-4434-1

libvncserverUbuntu

Fixed in:0.9.10+dfsg-3ubuntu0.16.04.5USN-4434-1

Fixed in:0.9.11+dfsg-1ubuntu1.3USN-4434-1

Fixed in:0.9.12+dfsg-9ubuntu0.2USN-4434-1

libvncserver1Ubuntu

Fixed in:0.9.10+dfsg-3ubuntu0.16.04.5USN-4434-1

Fixed in:0.9.11+dfsg-1ubuntu1.3USN-4434-1

Fixed in:0.9.12+dfsg-9ubuntu0.2USN-4434-1

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 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

2.80%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch2

Third-Party Advisory6

Release Notes1

github.com

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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.