Is CVE-2018-12551 in the CISA KEV catalog?

No. CVE-2018-12551 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-12551?

CVE-2018-12551 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2018-12551?

CVE-2018-12551 has an EPSS score of 1.47% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-12551?

Upgrade mosquitto on debian 11 to 1.5.6-1 or later.

CVE & CISA-KEV Catalog

CVE-2018-12551

HIGHEPSS 71th pctl

8.1

CVSS v3

NVD

Description

When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use a password file for authentication, any malformed data in the password file will be treated as valid. This typically means that the malformed data becomes a username and no password. If this occurs, clients can circumvent authentication and get access to the broker by using the malformed username. In particular, a blank line will be treated as a valid empty username. Other security measures are unaffected. Users who have only used the mosquitto_passwd utility to create and modify their password files are unaffected by this vulnerability.

CWE-703 CWE-287Improper Authentication

How to fix

Remediation Available

mosquittoDebian

Fixed in:1.5.6-1CVE-2018-12551

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.47%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Exploit1

bugs.eclipse.org

Other references1

lists.debian.org

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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.