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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.021 (81.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
- Wireshark
- Wireshark Foundation — versions >=3.4.0, <3.4.10
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
References
- www.wireshark.org/security/wnpa-sec-2021-16.html (Vendor Advisory)
- gitlab.com/wireshark/wireshark/-/issues/17737 (Exploit, Third Party Advisory, Issue Tracking)
- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.json (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202210-04 (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.