Is CVE-2018-7421 in the CISA KEV catalog?

No. CVE-2018-7421 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-7421?

CVE-2018-7421 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-7421?

CVE-2018-7421 has an EPSS score of 1.71% (75th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-7421?

Upgrade wireshark on debian 11 to 2.4.5-1 or later.

CVE & CISA-KEV Catalog

CVE-2018-7421

HIGHEPSS 75th pctl

7.5

CVSS v3

NVD

Description

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

CWE-835

How to fix

Remediation Available

wiresharkDebian

Fixed in:2.4.5-1CVE-2018-7421

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

1.71%probability of exploitation in 30 days

75thpercentile

Elevated risk: more likely to be exploited than 75% of all known CVEs.

References

Exploit1

bugs.wireshark.org

Vendor Advisory1

wireshark.org

Other references2

Related Vulnerabilities

Other CWE-835 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13935	High	7.5	88%	-	Fix
CVE-2020-36227	High	7.5	78%	-	Fix
CVE-2022-0778	High	7.5	71%	-	Fix
CVE-2019-14241	High	7.5	70%	-	-
CVE-2017-16944	High	7.5	63%	-	Fix
CVE-2024-20353	High	8.6	63%	KEV	-

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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.