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The L2TP protocol parser in tcpdump 3.8.1 and earlier allows remote attackers to cause a denial of service (infinite loop and memory consumption) via a packet with invalid data to UDP port 1701, which causes l2tp_avp_print to use a bad length value when calling print_octets.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade tcpdump | Jul 30, 2024 | Feb 17, 2004 |
| Freebsd | — | Upgrade FreeBSDUpgrade tcpdump | Dec 10, 2025 | Jan 19, 2004 |
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