Is CVE-2020-12100 in the CISA KEV catalog?

No. CVE-2020-12100 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-12100?

CVE-2020-12100 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-12100?

CVE-2020-12100 has an EPSS score of 5.21% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-12100?

Upgrade dovecot on debian 11 to 1:2.3.11.3+dfsg1-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-12100

HIGHEPSS 91th pctl

7.5

CVSS v3

NVD

Description

In Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts.

CWE-674

How to fix

Remediation Available

dovecotDebian

Fixed in:1:2.3.11.3+dfsg1-1CVE-2020-12100

dovecotUbuntu

Fixed in:1:2.2.9-1ubuntu2.6+esm3USN-4456-2

Fixed in:1:2.2.22-1ubuntu2.13USN-4456-1

Fixed in:1:2.2.33.2-1ubuntu4.6USN-4456-1

Fixed in:1:2.3.7.2-1ubuntu3.2USN-4456-1

dovecot-coreUbuntu

Fixed in:1:2.2.9-1ubuntu2.6+esm3USN-4456-2

Fixed in:1:2.2.22-1ubuntu2.13USN-4456-1

Fixed in:1:2.2.33.2-1ubuntu4.6USN-4456-1

Fixed in:1:2.3.7.2-1ubuntu3.2USN-4456-1

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

5.21%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Exploit1

openwall.com

Vendor Advisory1

dovecot.org

Third-Party Advisory7

Other references3

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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.