The SPNEGO dissector in Ethereal 0.9.8 to 0.10.3 allows remote attackers to cause a denial of service (crash) via unknown attack vectors that cause a null pointer dereference.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A987
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9695
https://exchange.xforce.ibmcloud.com/vulnerabilities/16151
http://www.securityfocus.com/bid/10347
http://www.redhat.com/support/errata/RHSA-2004-234.html
http://www.ethereal.com/appnotes/enpa-sa-00014.html
http://www.ciac.org/ciac/bulletins/o-150.shtml
http://securitytracker.com/id?1010158
http://security.gentoo.org/glsa/glsa-200406-01.xml
http://secunia.com/advisories/11836
http://secunia.com/advisories/11776
http://secunia.com/advisories/11608
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000916