CVE-2003-1029: Lbl Tcpdump

Medium severity, CVSS 5.0. EPSS: 9.9% chance of exploitation in the next 30 days.

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.

Affected products

• Lbl Tcpdump: version 3.4 only; version 3.5 only; version 3.5.2 only; version 3.6.2 only; version 3.6.3 only; version 3.7 only

Published 2004-02-17. Last modified 2026-06-16.