Multiple ethernet Network Interface Card (NIC) device drivers do not pad frames with null bytes, which allows remote attackers to obtain information from previous packets or kernel memory by using malformed packets, as demonstrated by Etherleak.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2665
http://www.securitytracker.com/id/1040185
http://www.securitytracker.com/id/1031583
http://www.securityfocus.com/archive/1/307564/30/26270/threaded
http://www.securityfocus.com/archive/1/305335/30/26420/threaded
http://www.redhat.com/support/errata/RHSA-2003-088.html
http://www.redhat.com/support/errata/RHSA-2003-025.html
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
http://www.kb.cert.org/vuls/id/412115
http://www.atstake.com/research/advisories/2003/atstake_etherleak_report.pdf
http://www.atstake.com/research/advisories/2003/a010603-1.txt
http://secunia.com/advisories/7996
http://marc.info/?l=bugtraq&m=104222046632243&w=2
http://archives.neohapsis.com/archives/vulnwatch/2003-q1/0016.html