What is CVE-2021-4186?

CVE-2021-4186 is a medium-severity software vulnerability (CWE-476) with a CVSS score of 6.3. Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

Is CVE-2021-4186 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 2%.

What products does CVE-2021-4186 affect?

Tracked products affected include Wireshark. Check the version you run to see whether it is affected.

How do I fix CVE-2021-4186?

Apply the vendor fix in your normal patch cycle. Upgrade affected products to a fixed version.

← All products

CVE-2021-4186

MEDIUM severity · CVSS 6.3 · CWE-476

6.3CVSS MEDIUM

Summary

Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionRequired

Confidentiality impactLow

Integrity impactLow

Availability impactLow

Exploit probability (EPSS)2%

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

Affected products we track (1)

Wireshark

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Additional information

NVD record
https://www.wireshark.org/security/wnpa-sec-2021-16.htmlAdvisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.jsonAdvisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2EY2VFBU3YGGWI5BW4XKT3F37MYGEQUD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q6XGBKWSQFCVYUN4ZK3O3NJIFP3OAFVT/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5AEK3XTOIOGCGUILUFISMGX54YJXWGJ/
https://security.gentoo.org/glsa/202210-04Advisory
https://gitlab.com/wireshark/wireshark/-/issues/17737Advisory