CVE-2021-4186: 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

High severity · published Dec 30, 2021

CVE-2021-4186

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

7.5

CVSS

2.3%

EPSS

On KEV

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)2.3% · higher than 83% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Wireshark · Wireshark Foundation

>=3.4.0, <3.4.10 · source: vendor, NVD

Fedora · Fedoraproject

34; 35 · source: NVD

Affected product

Wireshark

Wireshark Foundation

All Wireshark CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-4186

CVE.org

https://www.cve.org/CVERecord?id=CVE-2021-4186

Third Party Advisory

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.json

Exploit

https://gitlab.com/wireshark/wireshark/-/issues/17737

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2EY2VFBU3YGGWI5BW4XKT3F37MYGEQUD/

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ/

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q6XGBKWSQFCVYUN4ZK3O3NJIFP3OAFVT/

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5AEK3XTOIOGCGUILUFISMGX54YJXWGJ/