NULL pointer dereference in Wireshark
CVE-2021-39920
NULL pointer exception in the IPPUSB dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.033 (88.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.033 · change: +0.001
Affected products
- Wireshark
- Wireshark Foundation — versions >=3.4.0, <3.4.10
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.wireshark.org/security/wnpa-sec-2021-15.html (Vendor Advisory)
- gitlab.com/wireshark/wireshark/-/issues/17705 (Exploit, Third Party Advisory, Issue Tracking)
- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39920.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)
- www.debian.org/security/2021/dsa-5019 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202210-04 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39920?
- CVE-2021-39920 is a high-severity vulnerability in Wireshark, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-11-18.
- How severe is CVE-2021-39920?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-39920 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.