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Vulnerability DatabaseCVE-2025-9817
CVE-2025-9817:
Wireshark vulnerability analysis and mitigation
Overview
The vulnerability (CVE-2025-9817) affects Wireshark versions 4.4.0 to 4.4.8, involving a crash in the SSH dissector component. The issue was discovered and disclosed on August 27, 2025, and affects the core packet analysis functionality of Wireshark (Wireshark Advisory).
Technical details
The vulnerability is classified as a NULL Pointer Dereference (CWE-476) that occurs within the SSH dissector component of Wireshark. It has been assigned a CVSS v3.1 base score of 7.8 (High), with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating local attack vector, low attack complexity, no privileges required, and user interaction required (NVD).
Impact
When exploited, this vulnerability leads to a denial of service condition through a crash of Wireshark or TShark applications. The impact occurs when processing malformed packet trace files or malicious network traffic (Wireshark Advisory).
Mitigation and workarounds
The vulnerability has been fixed in Wireshark version 4.4.9. Users are advised to upgrade to this version or later to mitigate the risk (Wireshark Advisory).
Additional resources
Source: This report was generated using AI
Related Wireshark vulnerabilities:
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