The Live DVD for Edubuntu 9.10, 10.04 LTS, and 10.10 does not correctly regenerate iTALC private keys after installation, which causes each installation to have the same fixed key, which allows remote attackers to gain privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/65389
http://www.vupen.com/english/advisories/2011/0378