CVE-2021-39920: Null Pointer Dereference
First published: Thu Nov 18 2021(Updated: )
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
Credit: cve@gitlab.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/wireshark | 2.6.20-0+deb10u4 2.6.20-0+deb10u7 3.4.10-0+deb11u1 4.0.6-1~deb12u1 4.0.10-1 | |
| Wireshark Wireshark | >=3.4.0<3.4.10 | |
| Fedoraproject Fedora | =34 | |
| Fedoraproject Fedora | =35 |
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Reference Links
- https://gitlab.com/wireshark/wireshark/-/issues/17705
- https://www.wireshark.org/security/wnpa-sec-2021-15.html
- https://security-tracker.debian.org/tracker/CVE-2021-39920
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39920.json
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/
- https://security.gentoo.org/glsa/202210-04
- https://www.debian.org/security/2021/dsa-5019
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/
Frequently Asked Questions
What is CVE-2021-39920?
CVE-2021-39920 is a vulnerability in the IPPUSB dissector in Wireshark 3.4.0 to 3.4.9 that allows denial of service through packet injection or crafted capture file.
How does CVE-2021-39920 affect Wireshark?
CVE-2021-39920 affects Wireshark versions 3.4.0 to 3.4.9, allowing denial of service via packet injection or crafted capture file.
What is the severity of CVE-2021-39920?
CVE-2021-39920 has a severity level of 7.5 (high).
How can I fix CVE-2021-39920 in Wireshark?
To fix CVE-2021-39920, update Wireshark to version 3.4.10 or later.
Are there any references for CVE-2021-39920?
Yes, you can find more information about CVE-2021-39920 at the following references: [Link 1], [Link 2], [Link 3].
- collector/security-tracker-debian
- collector/nvd-index
- agent/softwarecombine
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/severity
- agent/author
- agent/last-modified-date
- agent/references
- agent/description
- agent/first-publish-date
- agent/event
- agent/tags
- agent/source
- package-manager/debian
- vendor/wireshark
- canonical/wireshark wireshark
- version/wireshark wireshark/3.4.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/34
- version/fedoraproject fedora/35