CVE-2009-4377: Wireshark

Medium severity, CVSS 4.3. EPSS: 2.7% chance of exploitation in the next 30 days.

The (1) SMB and (2) SMB2 dissectors in Wireshark 0.9.0 through 1.2.4 allow remote attackers to cause a denial of service (crash) via a crafted packet that triggers a NULL pointer dereference, as demonstrated by fuzz-2009-12-07-11141.pcap.

Affected products

• Wireshark Wireshark: version 0.9.2 only; version 0.9.5 only; version 0.9.6 only; version 0.9.7 only; version 0.9.8 only; version 0.9.10 only; …

Published 2009-12-21. Last modified 2026-06-16.