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CVE-2021-39921

Good to know:

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Date: November 18, 2021

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

Language: C

Severity Score

Related Resources (15)

https://www.debian.org/security/2021/dsa-5019
https://security.alpinelinux.org/vuln/CVE-2021-39921
https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html
https://nvd.nist.gov/vuln/detail/CVE-2021-39921
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39921.json
https://security-tracker.debian.org/tracker/CVE-2021-39921
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-39921
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/
https://www.wireshark.org/security/wnpa-sec-2021-14.html
https://gitlab.com/wireshark/wireshark/-/issues/17703
https://security.gentoo.org/glsa/202210-04
https://www.mend.io/vulnerability-database/CVE-2021-39921

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

Top Fix

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Upgrade Version

Upgrade to version v3.4.10,v3.2.18,wireshark-3.4.10,wireshark-3.2.18

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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