CVE-2021-4186
published 2021-12-30CVE-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
PriorityP337high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
2.21%
80.6th percentile
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
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | wireshark | < wireshark 3.6.0-1 (bookworm) | wireshark 3.6.0-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| msrc | cbl2_wireshark_3.4.14-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| wireshark | wireshark | >= 0 < 3.4.16-0+deb11u1 | 3.4.16-0+deb11u1 |
| wireshark | wireshark | >= 0 < 3.6.0-1 | 3.6.0-1 |
| wireshark | wireshark | >= 0 < 3.6.0-1 | 3.6.0-1 |
| wireshark | wireshark | >= 0 < 3.6.0-1 | 3.6.0-1 |
| wireshark | wireshark | >= 0 < 2.6.10-1~ubuntu14.04.0~esm3 | 2.6.10-1~ubuntu14.04.0~esm3 |
| wireshark | wireshark | >= 0 < 2.6.10-1~ubuntu16.04.0+esm2 | 2.6.10-1~ubuntu16.04.0+esm2 |
| wireshark | wireshark | >= 0 < 2.6.10-1~ubuntu18.04.0+esm2 | 2.6.10-1~ubuntu18.04.0+esm2 |
| wireshark | wireshark | >= 0 < 3.2.3-1ubuntu0.1~esm2 | 3.2.3-1ubuntu0.1~esm2 |
| wireshark | wireshark | >= 0 < 3.6.2-2ubuntu0.1~esm1 | 3.6.2-2ubuntu0.1~esm1 |
| wireshark | wireshark | 3.4.0 – 3.4.10 | — |
| wireshark_foundation | wireshark | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_msrc7.5HIGH
vendor_ubuntu7.5HIGH
vendor_debian6.3MEDIUM
vendor_redhat6.3MEDIUM
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Ubuntu
Wireshark vulnerabilities
vendor_ubuntu·2025-06-04·CVSS 7.5
CVE-2021-4182 [HIGH] Wireshark vulnerabilities
Title: Wireshark vulnerabilities
Summary: Several security issues were fixed in Wireshark.
It was discovered that Wireshark did not correctly handle recursion. If a
user or system were tricked into opening a specially crafted file, an
attacker could possibly use this issue to cause a denial of service. This
issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS
and Ubuntu 20.04 LTS. (CVE-2021-39929)
Roman Donchenko discovered that Wireshark did not correctly handle
parsing certain files. If a user or system were tricked into opening a
specially crafted file, an attacker could possibly use this issue to
cause a denial of service. This issue only affected Ubuntu 20.04 LTS.
(CVE-2021-4182)
It was discovered that Wireshark did not correctly handle parsing
certain files. I
Red Hat
wireshark: Gryphon dissector crash
vendor_redhat·2021-12-29·CVSS 6.3
CVE-2021-4186 [MEDIUM] CWE-20 wireshark: Gryphon dissector crash
wireshark: Gryphon dissector crash
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
A segmentation issue was found in Wireshark. This flaw allows an attacker with local network access to pass specially crafted capture files, causing an application to halt or crash.
Package: wireshark (Red Hat Enterprise Linux 6) - Not affected
Package: wireshark (Red Hat Enterprise Linux 7) - Not affected
Package: wireshark (Red Hat Enterprise Linux 8) - Not affected
Package: wireshark (Red Hat Enterprise Linux 9) - Will not fix
Microsoft
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
vendor_msrc·2021-12-14·CVSS 7.5
CVE-2021-4186 [MEDIUM] CWE-476 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
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
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
GitLab: GitLab
Customer Actio
Debian
CVE-2021-4186: wireshark - Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of ser...
vendor_debian·2021·CVSS 6.3
CVE-2021-4186 [MEDIUM] CVE-2021-4186: wireshark - Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of ser...
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
Scope: local
bookworm: resolved (fixed in 3.6.0-1)
bullseye: resolved (fixed in 3.4.16-0+deb11u1)
forky: resolved (fixed in 3.6.0-1)
sid: resolved (fixed in 3.6.0-1)
trixie: resolved (fixed in 3.6.0-1)
OSV
wireshark vulnerabilities
osv·2025-06-04·CVSS 7.5
CVE-2021-39929 [HIGH] wireshark vulnerabilities
wireshark vulnerabilities
It was discovered that Wireshark did not correctly handle recursion. If a
user or system were tricked into opening a specially crafted file, an
attacker could possibly use this issue to cause a denial of service. This
issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS
and Ubuntu 20.04 LTS. (CVE-2021-39929)
Roman Donchenko discovered that Wireshark did not correctly handle
parsing certain files. If a user or system were tricked into opening a
specially crafted file, an attacker could possibly use this issue to
cause a denial of service. This issue only affected Ubuntu 20.04 LTS.
(CVE-2021-4182)
It was discovered that Wireshark did not correctly handle parsing
certain files. If a user or system were tricked into opening a specially
crafted f
GHSA
GHSA-7c4g-8373-rcp3: Crash in the Gryphon dissector in Wireshark 3
ghsa_unreviewed·2021-12-31
CVE-2021-4186 [HIGH] CWE-476 GHSA-7c4g-8373-rcp3: Crash in the Gryphon dissector in Wireshark 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
OSV
CVE-2021-4186: Crash in the Gryphon dissector in Wireshark 3
osv·2021-12-30·CVSS 7.5
CVE-2021-4186 [HIGH] CVE-2021-4186: Crash in the Gryphon dissector in Wireshark 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
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.jsonhttps://gitlab.com/wireshark/wireshark/-/issues/17737https://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/202210-04https://www.wireshark.org/security/wnpa-sec-2021-16.htmlhttps://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.jsonhttps://gitlab.com/wireshark/wireshark/-/issues/17737https://lists.debian.org/debian-lts-announce/2024/09/msg00049.htmlhttps://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/202210-04https://www.wireshark.org/security/wnpa-sec-2021-16.html
2021-12-30
Published