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Vulnerability DatabaseCVE-2021-39920
CVE-2021-39920:
Wireshark vulnerability analysis and mitigation
Overview
A NULL pointer exception vulnerability was discovered in the IPPUSB dissector component of Wireshark versions 3.4.0 to 3.4.9. This vulnerability is tracked as CVE-2021-39920 and was fixed in version 3.4.10 (Wireshark Advisory, NVD).
Technical details
The vulnerability is classified as a NULL Pointer Dereference (CWE-476) that occurs in the IPPUSB dissector component. It received a CVSS v3.1 Base Score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating network accessibility with no required privileges or user interaction (NVD).
Impact
When exploited, this vulnerability allows an attacker to cause a denial of service condition in Wireshark through either packet injection on a network or by convincing a user to open a specially crafted capture file (Wireshark Advisory).
Mitigation and workarounds
The vulnerability was fixed in Wireshark version 3.4.10. Users are advised to upgrade to this version or later to mitigate the issue. Multiple Linux distributions have released security updates including Debian (DSA-5019-1), Fedora, and Gentoo (Debian Advisory, Gentoo Advisory).
Additional resources
Source: This report was generated using AI
Related Wireshark vulnerabilities:
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