CVE-2021-39920

    Dashboard / Vulnerabilities / CVE-2021-39920

    CVE-2021-39920

    Published: 18 Nov 2021Last Modified: 8 Jul 2026

    Summary:

    Details: 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

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/, https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39920.json, https://security.gentoo.org/glsa/202210-04, https://www.debian.org/security/2021/dsa-5019, https://www.wireshark.org/security/wnpa-sec-2021-15.html, https://gitlab.com/wireshark/wireshark/-/issues/17705

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 9733f173ea5e6255e8da208ef183210aa264d948
    Fixed -733b3a137c2ba8c8e517e5fb37bcc3030a43d603

    Affected versions

    v3.4.10rc0
    v3.4.9
    v3.4.9rc0
    v3.4.8
    v3.4.8rc0
    v3.4.7
    v3.4.7rc0
    v3.4.6
    v3.4.6rc0
    v3.4.5
    v3.4.5rc0
    v3.4.4
    v3.4.4rc0
    v3.4.3
    v3.4.3rc0
    v3.4.2
    v3.4.2rc0
    v3.4.1
    v3.4.1rc0
    v3.4.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-39920 | CVE-DB