The MITRE CVE dictionary describes this issue as:
The isis_print function, as called by isoclns_print, in tcpdump 3.9.1 and earlier allows remote attackers to cause a denial of service (infinite loop) via a zero length, as demonstrated using a GRE packet.
Red Hat security errata
|Red Hat Enterprise Linux version 3 (tcpdump)||RHSA-2005:421||May 11, 2005|
|Red Hat Enterprise Linux version 4 (tcpdump)||RHSA-2005:417||May 11, 2005|
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