NULL pointer dereference in Wireshark
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
EPSS: 0.021 (80.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.
Affected products
- Wireshark
- Wireshark Foundation — versions >=3.4.0, <3.4.10
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
References
- cve@gitlab.com (Vendor Advisory)
- cve@gitlab.com (Exploit, Third Party Advisory, Issue Tracking)
- cve@gitlab.com (Third Party Advisory)
- cve@gitlab.com (vendor-advisory)
- cve@gitlab.com (vendor-advisory)
- cve@gitlab.com (vendor-advisory)
- cve@gitlab.com (vendor-advisory)
- cve@gitlab.com (vendor-advisory, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-4186?
- CVE-2021-4186 is a medium-severity vulnerability in Wireshark, classified under NULL Pointer Dereference. CVSS score: 6.3/10. Published 2021-12-30.
- How severe is CVE-2021-4186?
- Medium severity. CVSS v3 base score is 6.3 out of 10.