CVEvulnerability
CVE-2021-39921
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-11-19
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-476
Description
NULL pointer exception in the Modbus dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file
Affected configurations
• wireshark wireshark (>= 3.2.0 <= 3.2.17)
• wireshark wireshark (>= 3.4.0 <= 3.4.9)
• fedoraproject fedora 34
• fedoraproject fedora 35
• debian debian linux 9.0
Related
Weakness · CWE (1)
- CWE-476 NULL Pointer Dereference weakness
References
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39921.json Third Party Advisory
- https://gitlab.com/wireshark/wireshark/-/issues/17703 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202210-04 Third Party Advisory
- https://www.debian.org/security/2021/dsa-5019 Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2021-14.html Vendor Advisory
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39921.json Third Party Advisory
- https://gitlab.com/wireshark/wireshark/-/issues/17703 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202210-04 Third Party Advisory
- https://www.debian.org/security/2021/dsa-5019 Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2021-14.html Vendor Advisory