CVE-2021-4184

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-12-30 · updated 2026-06-17
Weakness: CWE-835

Description

Infinite loop in the BitTorrent DHT dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

Affected products

Debian Linux: 9.0
Fedoraproject Fedora: 34, 35
Oracle Corporation Oracle HTTP Server: 12.2.1.3.0, 12.2.1.4.0
Oracle Corporation Oracle ZFS Storage Appliance Kit: 8.8
Wireshark Foundation Wireshark: from 3.4.0 through 3.4.10; 3.6.0

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4184.json
https://gitlab.com/wireshark/wireshark/-/issues/17754
https://lists.debian.org/debian-lts-announce/2022/03/msg00041.html
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/202210-04
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.wireshark.org/security/wnpa-sec-2021-18.html
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4184.json
https://gitlab.com/wireshark/wireshark/-/issues/17754
https://lists.debian.org/debian-lts-announce/2022/03/msg00041.html
https://lists.debian.org/debian-lts-announce/2024/09/msg00049.html

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