PT-2021-23432 · Wireshark+4 · Wireshark+4

Published 2021-12-30 · Updated 2025-06-04 · CVE-2021-4186

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Wireshark versions 3.4.0 through 3.4.10

Description The issue is related to a crash in the Gryphon dissector, allowing denial of service via packet injection or crafted capture file.

Recommendations For Wireshark versions 3.4.0 through 3.4.10, update to a version outside of this range to resolve the issue. As a temporary workaround, consider disabling the Gryphon dissector until a patch is available.

Exploit

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2022-1005

ALT-PU-2022-1096

ALT-PU-2022-1599

AZL-7421

CVE-2021-4186

DLA-3906-1

MGASA-2022-0004

OPENSUSE-SU-2022_3309-1

OPENSUSE-SU-2024:12329-1

SUSE-SU-2022:3309-1

SUSE-SU-2022_3309-1

USN-7552-1

Affected Products

Alt Linux

Linuxmint

Suse

Ubuntu

Wireshark

References · 48

• 🔥 https://gitlab.com/wireshark/wireshark/-/issues/17737 · Exploit
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ · Vendor Advisory
• https://osv.dev/vulnerability/AZL-7421 · Vendor Advisory
• https://wireshark.org/security/wnpa-sec-2021-16.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-4186 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-4186 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-0582 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7552-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-3190 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7552-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-4186 · Vendor Advisory
• https://security.gentoo.org/glsa/202210-04 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-0585 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-4186 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-4186 · Security Note