What’s Vulnerable › Vulnerabilities
CVE-2021-4181
- 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-125
Description
Crash in the Sysdig Event 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 before 3.4.11; 3.6.0 — fixed in 3.4.11
How to fix
Upgrade to a fixed version: Wireshark Foundation Wireshark 3.4.11. Check the vendor advisory for mitigations.
References
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4181.json
- https://gitlab.com/wireshark/wireshark/-/merge_requests/5429
- 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-2021-21.html
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4181.json
- https://gitlab.com/wireshark/wireshark/-/merge_requests/5429
- 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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