NULL Pointer Dereference Affecting wireshark package, versions [,4.4.9)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published18 Sept 2025
- disclosed3 Sept 2025
- creditUnknown
Introduced: 3 Sep 2025
NewCVE-2025-9817 (opens in a new tab)How to fix?
Upgrade wireshark to version 4.4.9 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference in the SSH dissector process. An attacker can cause the application to crash by convincing a user to open a specially crafted capture file or by injecting malformed SSH packets into network traffic that is being analyzed. This is only exploitable if the user opens a malicious capture file or analyzes traffic containing malformed SSH packets.
Workaround
This vulnerability can be mitigated by avoiding opening packet captures from untrusted sources, restricting analysis to known, reliable traffic, and running the application with non-privileged accounts or in a sandboxed environment.